1513-Kestrel PDF Datasheet.Pdf

Wind Meter

Model NO. 1000 2000 2500 3000 3500 3500DT Current Wind Speed 3 3 3 3 3 3 Max. Wind Gust 3 3 3 3 3 3 Avg. Wind Gust 3 3 3 3 3 3 Volume Air Flow Temperature 3 3 3 3 3 Wind Chill 3 3 3 3 Relative Humidity 3 3 3 Heat Stress Index 3 3 Dewpoint Temp. 3 3 3 Wet Bulb Temp. 3 3 Humidity Ratio Evaporation Rate Delta T 3 Barometric Pressure 3 3 3 Absolute Pressure Altitude 3 3 3 Air Density Density Altitude Digital Compass Wind Direction Crosswind Headwind/Tailwind Backlit Display 3 3 3 3 3 Pressure Trend 3 3 Data Storage Clock 3 3 3 order no. 0810 0820 0825 0830 0835 0835DT night vision order no. 0825NV 0835NV Wind Meter

Model NO. 4000 4200 4250 4300 4500 4500H Current Wind Speed 3 3 3 3 3 3 Max. Wind Gust 3 3 3 3 3 3 Avg. Wind Gust 3 3 3 3 3 3 Volume Air Flow 3 Temperature 3 3 3 3 3 3 Wind Chill 3 3 3 3 3 Relative Humidity 3 3 3 3 3 3 Heat Stress Index 3 3 3 3 3 Dewpoint Temp. 3 3 3 3 3 3 Wet Bulb Temp. 3 3 3 3 3 Humidity Ratio 3 3 Evaporation Rate 3 Delta T Barometric Pressure 3 3 3 3 3 Absolute Pressure 3 Altitude 3 3 3 3 3 Air Density 3 Density Altitude 3 3 3 3 3 3 Digital Compass 3 3 Wind Direction 3 3 Crosswind 3 3 Headwind/Tailwind 3 3 Backlit Display 3 3 3 3 3 3 Pressure Trend 3 3 3 3 Data Storage 2000 3600 3200 3600 2900 2900 Clock 3 3 3 3 3 3 Horus ATrag Ballistics 3 Colour Options TAN/OLV TAN/OLV TAN/OLV order no. 0840 0842 0842R 0843 0845 night vision order no. 0840NV 0845NV 0845H bluetooth order no. 0840b 0842b 0842Rb 0843b 0845B bluetooth/night vision order no. 0840bNV 0845BNV 0845HB SENSORS SENSORS 3500 4500 3500 4500 SENSOR 1000 2000 2500 3000 3500 4000 4200 4250 4300 4400 4500SENSOR 1000ACCURACY2000 2500(+/-)* 3000RESOLUTION3500 4000SPECIFICATION4200 4250 RANGE4300 4400 OPERATIONAL4500 RANGEACCURACY (+/-)*NOTES RESOLUTION SPECIFICATION RANGE OPERATIONAL RANGE NOTES DT HOR DT HOR

0.1 m/s 0.6 to 40.0 m/s 0.6 to 60.0 m/s 1 inch|25 mm diameter0.1 m/s impeller with precision0.6 to 40.0 axle m/s and low-friction Zytel®0.6 bearings. to 60.0 m/s Startup speed 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed Larger of 3% of 1 ft/min 118 to 7,874 ft/min 118 to 11,811 ft/minLarger of 3% ofstated as lower1 limit,ft/min readings may 118be taken to 7,874 down ft/min to 0.4 m/s | 79 ft/min118 | 1.5 to 11,811km/h | .9 ft/min mph | .8 kt stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt reading, least 0.1 km/h 2.2 to 144.0 km/h 2.2 to 216.0 km/hreading, leastafter impeller 0.1startup. km/h Off-axis accuracy2.2 to -1% 144.0 @ 5ºkm/h off-axis; -2% @ 10º;2.2 -3% to 216.0@ 15º. km/h Calibration after impeller startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration Wind Speed | Air Flow l l l l l l l l l l Windl Speedl | Air Flowl l l l l l l l l l l l l l significant digit or 20 0.1 mph 1.3 to 89.5 mph 1.3 to 134.2 significantmph digit ordrift 20 < 1% after0.1 100 mph hours use at 16 1.3MPH to |89.5 7 m/s. mph Replacement impeller1.3 (NK to 134.2PN-0801) mph field drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (NK PN-0801) field ft/min 0.1 knots 1.2 to 77.8 knots 1.2 to 116.6 knots ft/min installs without0.1 tools knots (US Patent 5,783,753).1.2 to 77.8 Wind knots speed calibration and1.2 testing to 116.6 should knots be done installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done 1 B 0 to 12 B 0 to 12 B with triangle on impeller1 B located at the top0 tofront 12 faceB of the Kestrel. 0 to 12 B with triangle on impeller located at the top front face of the Kestrel.

Temperature inside 1in|25 mm black powder coated copper globe converted to Tg equivalent for Temperature inside 1in|25 mm black powder coated copper globe converted to Tg equivalent for °F 0.1 °F -20.0 to 140.0 °F 14.0 to 131.0 °F °F 0.1 °F -20.0 to 140.0 °F 14.0 to 131.0 °F Globe Temperature - Tg Globe Temperaturel - Tg l standard 6 in|150 mm globe. Closest equivalence obtained with airflow greater than 2.2 mph|1 standard 6 in|150 mm globe. Closest equivalence obtained with airflow greater than 2.2 mph|1 1.4 °C 0.1 °C -29.0 to 60.0 °C -10.0 to 55.0 °C 1.4 °C 0.1 °C -29.0 to 60.0 °C -10.0 to 55.0 °C m/s. m/s.

Polymer capacitive humidity sensor mounted in thin-walled chamber external to case for rapid, Polymer capacitive humidity sensor mounted in thin-walled chamber external to case for rapid, accurate response (US Patent 6,257,074). To achieve stated accuracy, unit must be permitted to accurate response (US Patent 6,257,074). To achieve stated accuracy, unit must be permitted to 5 to 95% 5 to 95% Relative Humidity l l l l l l l Relativel l Humidityl 3.0 %RH l 0.1l %RH l l l l l l l 0 tol 100% 3.0 %RH equilibrate to 0.1external %RH temperature when exposed to large, rapid temperature0 to changes 100% and be kept equilibrate to external temperature when exposed to large, rapid temperature changes and be kept non-condensing non-condensing out of direct sunlight. Calibration drift +/- 2% over 24 months. Humidity sensor may be recalibrated out of direct sunlight. Calibration drift +/- 2% over 24 months. Humidity sensor may be recalibrated at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802). at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802).

Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. 8.86 to 32.49 inHg 0.30 to 48.87 inHg 8.86 to 32.49 inHg 0.30 to 48.87 inHg 0.03 Pressure 0.03 sensor may be recalibrated at factory or in field. Adjustable reference altitude allows Pressure sensor may be recalibrated at factory or in field. Adjustable reference altitude allows 300.0 to 1100.0 hPa|mbar 10.0 to 1654.7 hPa|mbar 300.0 to 1100.0 hPa|mbar 10.0 to 1654.7 hPa|mbar inHg 0.01 inHg inHg display of station0.01 pressureinHg or barometric pressure corrected to MSL. Kestrel 4200 displays display of station pressure or barometric pressure corrected to MSL. Kestrel 4200 displays 4.35 to 15.95 PSI 0.14 to 24.00 PSI 4.35 to 15.95 PSI 0.14 to 24.00 PSI Pressure l l l l l l l l lPressurel 1.0 hPa|mbarl 0.1 hPa|mbarl l l l l l l l l 1.0 hPa|mbarstation pressure0.1 hPa|mbar on a dedicated screen. Kestrel 2500 and 3500 display continuously updating station pressure on a dedicated screen. Kestrel 2500 and 3500 display continuously updating and and and and 0.01 PSI 0.01 PSI 0.01 PSI three-hour barometric0.01 PSI pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly. three-hour barometric pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly. 32.0 to 185.0 °F 14.0 to 131.0 °F 32.0 to 185.0 °F 14.0 to 131.0 °F Kestrel 4000 series displays pressure trend through graphing function. PSI display on Kestrel Kestrel 4000 series displays pressure trend through graphing function. PSI display on Kestrel 0.0 to 85.0 °C -10.0 to 55.0 °C 0.0 to 85.0 °C -10.0 to 55.0 °C 4000 series only. 4000 series only.

2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of 2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of sensor dependent upon unit's vertical position. Self-calibration routine eliminates magnetic error sensor dependent upon unit's vertical position. Self-calibration routine eliminates magnetic error 1° Specifications1° Chart Compass lCompassl 5° 0 to 360° l 0 tol 360° 5° from batteries or unit and must be run after0 to every360° full power-down (battery 0removal to 360° or change). from batteries or unit and must be run after every full power-down (battery removal or change). 1/16th Cardinal Scale 1/16th Cardinal Scale Readout indicates direction to which the back of the unit is pointed when held in a vertical Readout indicates direction to which the back of the unit is pointed when held in a vertical orientation. Declination/variation adjustable for True North readout. orientation. Declination/variation adjustable for True North readout. CalculatedCALCULATED Measurements MEASUREMENTS CALCULATED MEASUREMENTS 3500 4500 3500 4500 MEASUREMENT 1000 2000 2500 3000 3500 4000 4200 4250 4300 4400MEASUREMENT4500 1000ACCURACY2000 2500(+/-)* 3000RESOLUTION3500 4000SPECIFICATION4200 4250 RANGE4300 4400 SENSORS4500 EMPLOYEDACCURACY (+/-)*NOTES RESOLUTION SPECIFICATION RANGE SENSORS EMPLOYED NOTES DT HOR DT HOR Temperature Temperature 0.0002 lb/ft3 0.001 lbs/ft3 Refer to Ranges for 0.0002 lb/ft3 0.001 lbs/ft3 Refer to Ranges for Air Density l l Air Density l l Relative Humidity Mass of air per unit volume Relative Humidity Mass of air per unit volume 3 3 Sensors Employed 3 3 Sensors Employed 0.0033 kg/m 0.001 kg/m Pressure 0.0033 kg/m 0.001 kg/m Pressure 1 cfm 1 cfm 1 m3/hr Volume of air flowing1 m3/hr through an opening. Automatically calculated from Air Velocity measurement Volume of air flowing through an opening. Automatically calculated from Air Velocity measurement Refer to Ranges for Air Flow Refer to Ranges for Air Flow Air Flow l Air Flow 6.71% 1 m3/m l 6.71% and user-specified1 m3 /mduct shape (circle or rectangle) and dimensions (units: in, ft, cm or m). and user-specified duct shape (circle or rectangle) and dimensions (units: in, ft, cm or m). Sensors Employed User Input (Duct Shape & Size) Sensors Employed User Input (Duct Shape & Size) 0.1m3/s Maximum duct0.1m dimension3/s input: 258.0 in | 21.5 ft | 655.3 cm | 6.55 m. Maximum duct dimension input: 258.0 in | 21.5 ft | 655.3 cm | 6.55 m. 1 L/s 1 L/s typical: 23.6 ft typical: 23.6 Heightft above Mean Sea Level ("MSL"). Temperature compensated pressure (barometric) Height above Mean Sea Level ("MSL"). Temperature compensated pressure (barometric) typical: 750 to 1100 mBar typical: 750 to 1100 mBar 7.2 m 1 ft Pressure 7.2 m altimeter requires1 ftaccurate reference barometric pressure to produce maximumPressure absolute altimeter requires accurate reference barometric pressure to produce maximum absolute Altitude l l l l l l l l l Altitudel l l l l l l l l l l max: 48.2 ft 1 m User Input (Reference Pressure)max: 48.2 ftaccuracy. Both accuracy1 m specs corresponds to a reference pressureUser Input anywhere (Reference from Pressure) 850 to 1100 accuracy. Both accuracy specs corresponds to a reference pressure anywhere from 850 to 1100 max: 300 to 750 mBar max: 300 to 750 mBar 14.7 m 14.7 m mBar. mBar. 0.07 inHg 0.01 inHg 0.07 inHg Air pressure 0.01that would inHg be present in identical conditions at MSL. Station pressure compensated Air pressure that would be present in identical conditions at MSL. Station pressure compensated Refer to Ranges for Pressure Refer to Ranges for Pressure Barometric Pressure l l l l l l l Barometricl l Pressurel 2.4 hPa|mbarl 0.1 hPa|mbarl l l l l l l l l 2.4 hPa|mbarfor local elevation0.1 hPa|mbar provided by reference altitude. Requires accurate reference altitude to produce for local elevation provided by reference altitude. Requires accurate reference altitude to produce Sensors Employed User Input (Reference Altitude) Sensors Employed User Input (Reference Altitude) 0.03 PSI 0.01 PSI 0.03 PSI maximum absolute0.01 PSI accuracy. maximum absolute accuracy. 1 mph 1 mph 1 ft/min 1 ft/min Crosswind & Crosswind & Refer to Ranges for Wind Speed Refer to Ranges for Wind Speed l l 7.1% 0.1 km/h l l 7.1% Effective wind0.1 relative km/h to a target or travel direction. Auto-switching headwind/tailwind indication. Effective wind relative to a target or travel direction. Auto-switching headwind/tailwind indication. Headwind/Tailwind Headwind/Tailwind Sensors Employed Compass Sensors Employed Compass 0.1 m/s 0.1 m/s 0.1 knots 0.1 knots Temperature Temperature 3.2 °F 0.1 °F Refer to Ranges for 3.2 °F Difference between0.1 °F dry bulb temperatureRefer to and Ranges wet bulb for temperature. When spraying, indicates Difference between dry bulb temperature and wet bulb temperature. When spraying, indicates Delta T l Delta T l Relative Humidity Relative Humidity 1.8 °C 0.1 °C Sensors Employed 1.8 °C evaporation rate0.1 and °C droplet lifetime.Sensors Safe range Employed for pesticide spraying is 4 to 16 °F / 2 to 9 °C. evaporation rate and droplet lifetime. Safe range for pesticide spraying is 4 to 16 °F / 2 to 9 °C. Pressure Pressure Temperature Temperature 226 ft 1 ft Refer to Ranges for 226 ft Local air density1 converted ft to equivalent Refer toelevation Ranges above for sea level in a uniform layer consisting of Local air density converted to equivalent elevation above sea level in a uniform layer consisting of Density Altitude l l l l lDensityl Altitudel l l l l l lRelativel Humidity Relative Humidity 69 m 1 m Sensors Employed 69 m the International1 Standard m Atmosphere.Sensors Employed the International Standard Atmosphere. Pressure Pressure 15 to 95 % RH Temperature that a volume of air must15 be to cooled95 % RH to at constant pressure for the water vapor Temperature that a volume of air must be cooled to at constant pressure for the water vapor 3.4 °F 0.1 °F Temperature 3.4 °F 0.1 °F Temperature Dewpoint l l l l l l l l lDewpointl l l l l Referl to Rangel forl l l l present to condense into dew and formRefer on to a Range solid surface. for Can also be considered to be the present to condense into dew and form on a solid surface. Can also be considered to be the 1.9 °C 0.1 °C Relative Humidity 1.9 °C 0.1 °C Relative Humidity Temperature Sensor water-to-air saturation temperature.Temperature Sensor water-to-air saturation temperature.

Wind Speed Wind Speed The rate at which moisture is lost from the surface of curing concrete. Requires user The rate at which moisture is lost from the surface of curing concrete. Requires user 2 Temperature 2 Temperature 0.01 lb/ft2/hr 0.01 b/ft /hr Refer to Ranges for 0.01 lb/ft2/hrmeasurement0.01 and b/ft entry/hr of concreteRefer temperature to Ranges obtained for with an accurate IR or probe measurement and entry of concrete temperature obtained with an accurate IR or probe Evaporation Rate l Evaporation Rate l Relative Humidity Relative Humidity 0.06 kg/m2/hr 2 Sensors Employed 0.06 kg/m2/hrthermometer (°F or °C,2 not included).Sensors Readings Employed should be taken 20 inches above pour surface thermometer (°F or °C, not included). Readings should be taken 20 inches above pour surface 0.01 kg/m /hr Pressure 0.01 kg/m /hr Pressure with the thermistor shaded, and averaged for 6-10 seconds using built-in averaging function. with the thermistor shaded, and averaged for 6-10 seconds using built-in averaging function. User Input (Concrete Temperature) User Input (Concrete Temperature)

Perceived temperature resulting from the combined effect of temperature and relative humidity. Perceived temperature resulting from the combined effect of temperature and relative humidity. 7.1 °F 0.1 °F Refer to Ranges for Temperature 7.1 °F 0.1 °F Refer to Ranges for Temperature Heat Index l l l l l l l l Heatl Indexl l l l l l l l l l l Calculated based on NWS Heat Index (HI) tables. Measurement range limited by extent of Calculated based on NWS Heat Index (HI) tables. Measurement range limited by extent of 4.0 °C 0.1 °C Sensors Employed Relative Humidity 4.0 °C 0.1 °C Sensors Employed Relative Humidity published tables. published tables. Temperature Temperature Moisture Content | Moisture Content | .3 gpp .04 0.1 gpp Refer to Ranges for .3 gpp .04 0.1 gpp Refer to Ranges for l l l l Relative Humidity Mass of water vapor in a mass of air. Relative Humidity Mass of water vapor in a mass of air. Humidity Ratio ("Grains") Humidity Ratio ("Grains") g/kg 0.01 g/kg Sensors Employed g/kg 0.01 g/kg Sensors Employed Pressure Pressure Temperature Temperature Refer to Ranges for The ratio, expressed as a percentage,Refer of to measured Ranges for air density to the air density of a standard The ratio, expressed as a percentage, of measured air density to the air density of a standard Relative Air Density l Relative Air Density 0.3% 0.1% l Relative Humidity 0.3% 0.1% Relative Humidity Sensors Employed atmosphere as defined by the ICAO.Sensors Employed atmosphere as defined by the ICAO. Pressure Pressure Wind Speed Wind Speed Temperature Estimated safe maximum continuously sustainable human metabolic rateTemperature (W/m2) for the Estimated safe maximum continuously sustainable human metabolic rate (W/m2) for the Refer to Ranges for Refer to Ranges for Thermal Work Limit (TWL) Thermal Workl Limit (TWL) 10.9 W/m2 0.1 W/m2 l Globe Temperature10.9 W/m2 conditions and0.1 clothing W/m2 factors. Based off of estimated metabolic outputGlobe of typical Temperature human. On- conditions and clothing factors. Based off of estimated metabolic output of typical human. On- Sensors Employed Sensors Employed Relative Humidity screen zone warnings. Relative Humidity screen zone warnings. Pressure Pressure Wind Speed Wind Speed Outdoor Wet Bulb Globe Outdoor Wet Bulb Globe Temperature Measure of human heat stress defined as the combination of effects dueTemperature to radiation, convection, Measure of human heat stress defined as the combination of effects due to radiation, convection, 1.3 °F 0.1 °F Refer to Ranges for 1.3 °F 0.1 °F Refer to Ranges for Temperature l Temperature l Globe Temperature and conduction. Outdoor WBGT is calculated from a weighted sum ofGlobe natural Temperature wet bulb (Tnwb), and conduction. Outdoor WBGT is calculated from a weighted sum of natural wet bulb (Tnwb), 0.7 °C 0.1 °C Sensors Employed 0.7 °C 0.1 °C Sensors Employed (WBGT) (WBGT) Relative Humidity globe temperature (Tg), and dry bulb temperature (Td). User settable on-screenRelative Humidity warning zones. globe temperature (Tg), and dry bulb temperature (Td). User settable on-screen warning zones. Pressure Pressure Wind Speed Wind Speed Similar to psychrometric wet-bulb temperature (see below). However, Tnwb only undergoes forced Similar to psychrometric wet-bulb temperature (see below). However, Tnwb only undergoes forced Temperature Temperature Wet Bulb Temperature - Wet Bulb Temperature - 1.4 °F 0.1 °F Refer to Ranges for 1.4 °F convection from0.1 the °F ambient air velocity.Refer toTnwb Ranges is a measurefor of the evaporative cooling that the air convection from the ambient air velocity. Tnwb is a measure of the evaporative cooling that the air l l Globe Temperature Globe Temperature Naturally Aspirated (Tnwb) Naturally Aspirated (Tnwb) 0.8 °C 0.1 °C Sensors Employed 0.8 °C will allow. This is0.1 accounted °C for by combiningSensors Employed the effects of, mainly, relative humidity and will allow. This is accounted for by combining the effects of, mainly, relative humidity and Relative Humidity Relative Humidity windspeed. windspeed. Pressure Pressure Temperature indicated by a sling psychrometer. Due to nature of the psychrometric ratio for a Temperature indicated by a sling psychrometer. Due to nature of the psychrometric ratio for a Temperature Temperature Wet Bulb Temperature - Wet Bulb Temperature - 3.2 °F 0.1 °F Refer to Ranges for 3.2 °F water-air system,0.1 this °F approximatesRefer the thermodynamicto Ranges for wet-bulb temperature. The thermodynamic water-air system, this approximates the thermodynamic wet-bulb temperature. The thermodynamic l l l l l l l l l l l l l l l l lRelativel Humidity Relative Humidity Psychrometric Psychrometric 1.8 °C 0.1 °C Sensors Employed 1.8 °C wet-bulb temperature0.1 °C is the temperatureSensors a parcel Employed of air would have if cooled adiabatically to wet-bulb temperature is the temperature a parcel of air would have if cooled adiabatically to Pressure Pressure saturation temperature via water evaporating into it. saturation temperature via water evaporating into it.

Perceived temperature resulting from combined effect of wind speed and temperature. Calculated Perceived temperature resulting from combined effect of wind speed and temperature. Calculated 1.6 °F 0.1 °F Refer to Ranges for Wind Speed 1.6 °F based on the NWS0.1 °F Wind Chill TemperatureRefer to Ranges (WCT) forIndex, revised 2001, Windwith wind Speed speed adjusted based on the NWS Wind Chill Temperature (WCT) Index, revised 2001, with wind speed adjusted Wind Chill l l l l l l l l l Windl Chilll l l l l l l l l l l l 0.9 °C 0.1 °C Sensors Employed Temperature 0.9 °C by a factor of 1.50.1 to °C yield equivalentSensors results toEmployed wind speed measured at 10Temperature m above ground. by a factor of 1.5 to yield equivalent results to wind speed measured at 10 m above ground. Measurement range limited by extent of published tables. Measurement range limited by extent of published tables. ADDITIONAL SPECIFICATIONS ADDITIONAL SPECIFICATIONS l l l Reflectivel l3 1/2 digit LCD.l Digit height 0.36 in / 9 mm. Aviation green electroluminescent backlight. ManualReflective activation 3 1/2 digit with LCD. auto-off. Digit height 0.36 in / 9 mm. Aviation green electroluminescent backlight. Manual activation with auto-off. Display & Backlight l l l Display & Backlight Reflective 5 digit LCD.l Digit heightl 0.36 inl / 9 mm. Choice of aviation green or visible red (NV modelsReflective only) electroluminescent 5 digit LCD. Digit backlight. height 0.36 Manual in / 9 activationmm. Choice with of auto-off. aviation green or visible red (NV models only) electroluminescent backlight. Manual activation with auto-off. l l l l l l l Multifunction, multi-digit monochrome dot-matrix display.l l Choicel of aviationl greenl or visiblel redl (NVMultifunction, models only) multi-digitelectroluminescent monochrome backlight. dot-matrix Automatic display. or Choicemanual ofactivation. aviation green or visible red (NV models only) electroluminescent backlight. Automatic or manual activation. All measurements except those based on relative humidity respond accurately within 1 second. RelativeAll measurements humidity and all except measurements those based which on relativeinclude humidityRH in their respond calculation accurately may require within 1as second. long as Relative 1 minute humidity to fully and all measurements which include RH in their calculation may require as long as 1 minute to fully Response Time l l l l l l l l l l lResponsel Timel l l l l l l l l l l l l l & Display Update & Display Update equilibrate to a large change in the measurement environment. Display updates every 1 second. equilibrate to a large change in the measurement environment. Display updatesContinued every 1 second. ... l l l l l l One-buttonl l clear andl restartl of Maxl Windl Gust and Average Wind measurement. One-button clear and restart of Max Wind Gust and Average Wind measurement. Max/Avg Wind Max/Avg Wind Max and average wind calculation may be started and stopped independently of data logging of otherMax values, and averagealong with wind all othercalculation wind-related may be functions: started and air stopped velocity, independently crosswind, headwind/tailwind, of data logging of wind other chill, values, WBGT, along with all other wind-related functions: air velocity, crosswind, headwind/tailwind, wind chill, WBGT, l l l l l l l l l l l l l l TWL, evaporation rate. TWL, evaporation rate. l l l l l l l l l l l l l l Data Storage & Graphical Data Storage & Graphical Minimum, maximum, average and logged history stored and displayed for every measured value. LargeMinimum, capacity maximum, data logger average with graphicaland logged display. history Manual stored andand autodisplayed data storage.for every Min/Max/Avg measured value. history Large may capacity be reset data logger with graphical display. Manual and auto data storage. Min/Max/Avg history may be reset Display, Min/Max/Avg 4000 3200 3200 3600Display,2300 Min/Max/Avg2900 2500 independently. Auto-store interval settable from4000 2 seconds3200 to 123200 hours,3600 overwrite2300 on or2900 off. Logs2500 evenindependently. when display Auto-store off except interval for 2 and settable 5 second from intervals 2 seconds (code to 12version hours, 4.18 overwrite and later). on or Data off. Logscapacity even shown. when display off except for 2 and 5 second intervals (code version 4.18 and later). Data capacity shown. History points points points points points pointsHistorypoints points points points points points points points Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Data Upload & Bluetooth® Data Upload & Bluetooth® l l l l l l l Bluetooth Data Transfer Option: Adjustable powerl consumptionl l andl radio rangel froml up tol 30 ftBluetooth | 9 meters. Data Individual Transfer unit ID Option: and 4-digit Adjustable PIN code power preprogrammed consumption for and easy radio identification range from andup to data 30 ftsecurity | 9 meters. when Individual unit ID and 4-digit PIN code preprogrammed for easy identification and data security when Data Connect Option Data Connect Option pairing and transmitting. Employs Bluetooth Serial Port Protocol for data transmission. pairing and transmitting. Employs Bluetooth Serial Port Protocol for data transmission. l l l l l l Requiresl optionall lPC interfacel (USBl or RS-232)l or Bluetooth data transfer option and provided software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Clock / Calendar Clock / Calendar l l l l l l l Requires optional PC interface (USB or RS-232)l or Bluetoothl datal transferl optionl andl providedl software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. l l l l l l Requiresl optionall lPC interfacel (USBl or RS-232)l or Bluetooth data transfer option and provided software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Auto Shutdown Auto Shutdown l l l l l l l Requires optional PC interface (USB or RS-232)l or Bluetoothl datal transferl optionl andl providedl software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Languages l l l l l Languagesl l English, French, German, Italian, Spanish. l l l l l l l English, French, German, Italian, Spanish. Certifications l l l l l l l l l l l Certificationsl l CEl certified,l RoHSl and WEEEl compliant.l l Individuallyl testedl to NIST-traceablel l lstandardsl (writtenl certificateCE certified, of tests RoHS available and WEEE at additional compliant. charge). Individually tested to NIST-traceable standards (written certificate of tests available at additional charge). Origin l l l l l l l l l l l l Originl Designedl land manufacturedl l in thel USA froml USl and importedl components.l l Compliesl lwith Regionall Designed Value Content and manufactured and Tariff Code in the Transformation USA from US requirements and imported forcomponents. NAFTA Preference Complies Criterionwith Regional B. Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B. l l l l l l CR2032,l one,l included.l Averagel llife, 300l hours. Battery life reduced by backlight use in 2000 to 3500CR2032, models. one, included. Average life, 300 hours. Battery life reduced by backlight use in 2000 to 3500 models. Battery Life Battery Life l l l l l l l Standard Models: AAA Alkaline, two, included. lAveragel life, 400l hoursl of use,l reducedl by backlightl Standard or Bluetooth Models: radio transmissionAAA Alkaline, use. two, included. Average life, 400 hours of use, reduced by backlight or Bluetooth radio transmission use. Shock Resistance l l l l l l l l l l Shockl Resistancel l MIL-STD-810g,l l Transitl Shock,l Methodl 516.5l Procedurel l IV; unitl only; impactl mayl damagel replaceablel MIL-STD-810g, impeller. Transit Shock, Method 516.5 Procedure IV; unit only; impact may damage replaceable impeller. Sealing l l l l l l l l l l l l Sealingl Waterproofl l (IP67 land NEMA-6).l l l l l l l l l l Waterproof (IP67 and NEMA-6). 14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature14° F to 131° range F | -10 of °Cthe to display 55 °C and Measurements batteries by maintainingmay be taken the beyond unit within the limits the operational of the operational range and temperature exposing rangeit of the display and batteries by maintaining the unit within the operational range and exposing it Operational Temperature l l l l l l l l l Operationall l Temperaturel l l l l l l l l l l l l l l Limits Limits to the more extreme environment for the minimum time necessary to take reading. to the more extreme environment for the minimum time necessary to take reading. Storage Temperature l l l l l l l l l l Storagel Temperaturel l -22.0l °F tol 140.0 °Fl | -30.0l °C to l60.0 °Cl l l l l l l l -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C l l l l l l 4.8l x 1.9 xl 1.1 in / l12.2 x 4.8l x 2.8l cm, 3.6l oz / 102 g (including slip-on cover). 4.8 x 1.9 x 1.1 in / 12.2 x 4.8 x 2.8 cm, 3.6 oz / 102 g (including slip-on cover). Size & Weight l l l l Sizel & Weightl 5.0 x 1.8 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 3.6 oz / 102l g. l l l l l 5.0 x 1.8 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 3.6 oz / 102 g. l 6.5 x 2.3 x 1.1 in / 16.5 x 5.9 x 2.8 cm, 4.4 oz / 125 g. l 6.5 x 2.3 x 1.1 in / 16.5 x 5.9 x 2.8 cm, 4.4 oz / 125 g. * NOTE: Accuracy calculated as uncertainty of the measurement derived from statistical* NOTE: analysis Accuracy considering calculated the as comineduncertainty effects of the from measurement primary sensor derived specifications, from statistical circuit analysis conversions, considering and allthe other comined sources effects of error from using primary a coverage sensor specifications, factor of k=2, circuitor two conversions,standard deviations and all (2Σ).other sources of error using a coverage factor of k=2, or two standard deviations (2Σ).

Please note, these specifications are valid for all Kestrel 4400 products andPlease all other note, Kestrel these 4000specifications series with are a validserial for number all Kestrel higher 4400 than products 659340. andIf your all otherproduct Kestrel has a 4000 lower series serial with number, a serial please number reference higher thanthe previous 659340. Ifversion your product of the specifications has a lower serial. number, please reference the previous version of the specifications .

© 2013 Nielsen-Kellerman | 21 Creek Circle Boothwyn PA 19061 USA | www.NKhome.com © 2013 Nielsen-Kellerman | 21 Creek Circle Boothwyn PA 19061 USA | www.NKhome.com SENSORS SENSORS 3500 4500 3500 4500 SENSOR 1000 2000 2500 3000 3500 4000 4200 4250 4300 4400 4500SENSOR 1000ACCURACY2000 2500(+/-)* 3000RESOLUTION3500 4000SPECIFICATION4200 4250 RANGE4300 4400 OPERATIONAL4500 RANGEACCURACY (+/-)*NOTES RESOLUTION SPECIFICATION RANGE OPERATIONAL RANGE NOTES DT HOR DT HOR

0.1 m/s 0.6 to 40.0 m/s 0.6 to 60.0 m/s 1 inch|25 mm 0.1diameter m/s impeller with precision0.6 to 40.0 axle m/s and low-friction Zytel®0.6 bearings. to 60.0 m/s Startup speed 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed Larger of 3% of 1 ft/min 118 to 7,874 ft/min 118 to 11,811 ft/minLarger of 3% ofstated as lower1 limit,ft/min readings may 118be taken to 7,874 down ft/min to 0.4 m/s | 79 ft/min118 | 1.5 to 11,811km/h | .9 ft/min mph | .8 kt stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt reading, least 0.1 km/h 2.2 to 144.0 km/h 2.2 to 216.0 km/hreading, leastafter impeller 0.1startup. km/h Off-axis accuracy2.2 to -1% 144.0 @ 5ºkm/h off-axis; -2% @ 10º;2.2 -3% to 216.0@ 15º. km/h Calibration after impeller startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration Wind Speed | Air Flow l l l l l l l l l l Windl Speedl | Air Flowl l l l l l l l l l l l l l significant digit or 20 0.1 mph 1.3 to 89.5 mph 1.3 to 134.2 significantmph digit ordrift 20 < 1% after0.1 100 mph hours use at 16 1.3MPH to |89.5 7 m/s. mph Replacement impeller1.3 (NK to 134.2PN-0801) mph field drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (NK PN-0801) field ft/min 0.1 knots 1.2 to 77.8 knots 1.2 to 116.6 knots ft/min installs without0.1 tools knots (US Patent 5,783,753).1.2 to 77.8 Wind knots speed calibration and1.2 testing to 116.6 should knots be done installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done 1 B 0 to 12 B 0 to 12 B with triangle on impeller1 B located at the top0 tofront 12 faceB of the Kestrel. 0 to 12 B with triangle on impeller located at the top front face of the Kestrel.

Hermetically-sealed, precision thermistor mounted externally and thermally isolated (US Patent Hermetically-sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and 0.9 °F 0.1 °F -20.0 to 158.0 °F 14.0.0 to 131.0 °F 0.9 °F reduction of insolation0.1 °F effect. Calibration-20.0 driftto 158.0 negligible. °F Thermistor may14.0.0 also to be 131.0 used °Fto measure reduction of insolation effect. Calibration drift negligible. Thermistor may also be used to measure Ambient Temperature l l l l l l l l l Ambientl Temperaturel l l l l l l l l l l l l l 0.5 °C 0.1 °C -29.0 to 70.0 °C -10.0 to 55.0 °C 0.5 °C temperature of0.1 water °C or snow by submerging-29.0 to 70.0 thermistor °C portion into material-10.0 --to remove55.0 °C impeller temperature of water or snow by submerging thermistor portion into material -- remove impeller prior to taking submerged measurements and ensure humidity sensor membrane is free of liquid prior to taking submerged measurements and ensure humidity sensor membrane is free of liquid SENSORSwater prior to taking humidity based measurements after submersion. water prior to taking humidity based measurements after submersion. SENSORS 3500 4500 Temperature inside 1in|25 mm black powder coated copper globe converted to Tg equivalent for Temperature inside 1in|25 mm black powder coated copper globe converted to Tg equivalent for SENSOR 1000 2000 2500°F 3000 3500 0.1 °F4000 4200 4250-20.04300 to 140.04400 °F 4500 ACCURACY14.0 to 131.0 (+/-)* °F RESOLUTION °F SPECIFICATION0.1 °F RANGE -20.0 OPERATIONALto 140.0 °F RANGE 14.0NOTES to 131.0 °F 3500 4500 Globe Temperature - Tg Globe Temperaturel - Tg DT HORl standard 6 in|150 mm globe. Closest equivalence obtained with airflow greater than 2.2 mph|1 standard 6 in|150 mm globe. Closest equivalence obtained with airflow greater than 2.2 mph|1 SENSOR 1000 2000 2500 3000 3500 4000 4200 4250 4300 4400 4500 ACCURACY (+/-)* RESOLUTION SPECIFICATION RANGE OPERATIONAL RANGE NOTES 1.4 °C 0.1 °C -29.0 to 60.0 °C -10.0 to 55.0 °C 1.4 °C 0.1 °C -29.0 to 60.0 °C -10.0 to 55.0 °C DT HOR m/s. m/s. 0.1 m/s 0.6 to 40.0 m/s 0.6 to 60.0 m/s 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed 0.1 m/s 0.6 to 40.0 m/s 0.6 to 60.0 m/s 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed Larger of 3% of 1 ft/min 118 to 7,874 ft/min 118 to 11,811 ft/min stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt reading, least 0.1 km/hPolymer capacitive2.2 to humidity144.0 km/h sensor mounted 2.2in thin-walled to 216.0 km/h chamber externalafter impeller to case startup. for rapid, Off-axis accuracyPolymer -1% capacitive @ 5º off-axis; humidity -2% sensor @ 10º; -3%mounted @ 15º. in Calibration thin-walled chamber external to case for rapid, Larger of 3% of 1 ft/min 118 to 7,874 ft/min 118 to 11,811 ft/min stated as lower limit,Wind readings Speed may | Air be Flowtaken downl to 0.4l m/s | 79l ft/minl | 1.5 km/hl | .9 mphl | .8 lkt l l l l l l reading, least 0.1 km/h 2.2 to 144.0 km/h 2.2 to 216.0 km/h after impeller startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration Wind Speed | Air Flow significant digit or 20 0.1 mphaccurate response1.3 to (US 89.5 Patent mph 6,257,074). To1.3 achieve to 134.2 stated mph accuracy,drift unit < 1%must after be 100 permitted hours use to ataccurate 16 MPH |response 7 m/s. Replacement (US Patent impeller 6,257,074). (NK PN-0801) To achieve field stated accuracy, unit must be permitted to l l l l l l l l l l l l l reading, least 0.1 km/h 2.2 to 144.0 km/h 2.2 to 216.0 km/h after impeller startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration 5 to 95% significant digit or 20 0.1 mph 1.3 to 89.5 mph 5 to 95%1.3 to 134.2 mph drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (NK PN-0801) field Wind Speed | Air Flow Relative Humidity l l l l l l l Relativel l Humidityl 3.0 %RH l 0.1l %RH l l l l l l l 0ft/min tol 100% 3.0 %RH0.1 knotsequilibrate to 0.1external1.2 %RH to 77.8 temperature knots when exposed1.2 to to116.6 large, knots rapid temperatureinstalls0 to changes without100% tools and (US be Patentkept equilibrate5,783,753). toWind external speed temperature calibration and when testing exposed should be to done large, rapid temperature changes and be kept significant digit or 20 0.1 mph 1.3 to 89.5 mph 1.3 to 134.2 mph drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (NK PN-0801) field non-condensing ft/min 0.1 knots 1.2 to 77.8 knots non-condensing1.2 to 116.6 knots installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done ft/min 0.1 knots 1.2 to 77.8 knots 1.2 to 116.6 knots installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done 1 Bout of direct sunlight.0 to Calibration 12 B drift +/- 2% over0 24 to months.12 B Humidity sensorwith triangle may on be impeller recalibrated located outat the of top direct front sunlight. face of the Calibration Kestrel. drift +/- 2% over 24 months. Humidity sensor may be recalibrated 1 B 0 to 12 B 0 to 12 B with triangle on impeller located at the top front face of the Kestrel. at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802). at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802). Hermetically-sealed, precision thermistor mounted externally and thermally isolated (US Patent Monolithic silicon piezoresistive pressure sensor with second-order temperature5,939,645) correction. for rapid response. AirflowMonolithic of 2.2 silicon mph|1 piezoresistivem/s or greater provides pressure fastest sensor response with second-order and temperature correction. Hermetically-sealed, precision thermistor mounted externally and thermally isolated (US Patent 8.86 to 32.49 inHg 0.30 to 48.87 inHg 8.86 to 32.49 inHg 0.305,939,645) to 48.87 for inHg rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s l or greater l provides 0.03l fastestl responsel land l l l l l l 0.9 °F 0.1 °FPressure 0.03 sensor-20.0 may to 158.0be recalibrated °F at factory14.0.0 or into field.131.0 Adjustable°F referencereduction ofaltitude insolation allows effect. CalibrationPressure drift sensor negligible. may Thermistor be recalibrated may also at befactory used toor measurein field. Adjustable reference altitude allows Ambient Temperature l l l l l l l 300.0l to 1100.0l hPa|mbarl l l 10.0 to 1654.7 hPa|mbar 300.0 to 1100.0 hPa|mbar 10.0 to 1654.7 hPa|mbar 0.9 °F 0.1 °F -20.0 to 158.0 °F 14.0.0 to 131.0 °F reduction of insolation effect. Calibration drift negligible. ThermistorinHg may also be used0.01 to measure inHg 0.5 °C inHg0.1 °Cdisplay of station0.01-29.0 pressureinHg to 70.0 °Cor barometric pressure-10.0 correctedto 55.0 °C to MSL. Kestreltemperature 4200 of displays water or snow bydisplay submerging of station thermistor pressure portion or into barometric material -- pressureremove impeller corrected to MSL. Kestrel 4200 displays Ambient Temperature l l l l l l l l l l l l 4.35 to 15.95 PSI 0.14 to 24.00 PSI 4.35 to 15.95 PSI 0.14 to 24.00 PSI 0.5 °C 0.1 °C Pressure -29.0 to 70.0 °C l -10.0l to 55.0l °C l temperaturel l of waterl or snowl by submerginglPressurel thermistor1.0 portion hPa|mbar into materiall -- remove0.1 hPa|mbar limpeller l l l l l l l l 1.0 hPa|mbarstation pressure0.1 hPa|mbar on a dedicated screen. Kestrel 2500 and 3500 displayprior continuously to taking submerged updating measurementsstation pressure and ensure on humiditya dedicated sensor screen. membrane Kestrel is free 2500 of liquid and 3500 display continuously updating and and and water andprior to taking humidity based measurements after submersion. prior to taking submerged measurements and ensure humidity0.01 sensorPSI membrane is free0.01 of PSI liquid 0.01 PSI three-hour barometric0.01 PSI pressure trend indicator: rising rapidly, rising, steady,water priorfalling, to takingfalling humidity rapidly. based three-hour measurements barometric after submersion.pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly. 32.0 to 185.0 °F 14.0 to 131.0 °F 32.0 to 185.0 °F 14.0 to 131.0 °F water prior to taking humidity based measurements after submersion. Kestrel 4000 series displays pressure trend through graphing function. PSI display on Kestrel Kestrel 4000 series displays pressure trend through graphing function. PSI display on Kestrel 0.0 to 85.0 °C -10.0 to 55.0 °C 0.0 to 85.0 °C -10.0Temperature to 55.0 inside °C 1in|25 mm black powder coated copper globe converted to Tg equivalent for l °F 0.1 °F -20.0 to 140.0 °F 14.0 to 131.0 °F Temperature insideGlobe 1in|25 Temperature mm black powder - Tg coated copper globe converted to Tg equivalent for l 4000 series only. standard 6 in|150 mm globe. Closest4000 equivalence series only. obtained with airflow greater than 2.2 mph|1 °F 0.1 °F -20.0 to 140.0 °F 14.0 to 131.0 °F 1.4 °C 0.1 °C -29.0 to 60.0 °C -10.0 to 55.0 °C Globe Temperature - Tg l standard 6 in|150 mm globe. Closest equivalence obtained with airflow greater than 2.2 mph|1 m/s. 1.4 °C 0.1 °C -29.0 to 60.0 °C -10.0 to 55.0 °C m/s. 2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of 2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of sensor dependent upon unit's vertical position. Self-calibration routine eliminatesPolymer capacitive magnetic humidity error sensorsensor mounted dependent in thin-walled upon chamberunit's vertical external position. to case Self-calibrationfor rapid, routine eliminates magnetic error Polymer capacitive humidity sensorl mountedl in thin-walled chamber external to case for 1°rapid, l l 1° accurate response (US Patent 6,257,074). To achieve stated accuracy, unit must be permitted to Compass Compass 5° l l l l l l 0 tol 360°l l l 0 to 360° 5° from batteries or unit5 to and 95% must be run after0 to every360° full power-down (battery 0removal to 360° or change). from batteries or unit and must be run after every full power-down (battery removal or change). accurate response (US RelativePatent 6,257,074). Humidity To achieve stated accuracy,l unit 1/16thmustl be Cardinal lpermittedl Scale to l l l l l l 3.0 %RH 0.1 %RH 1/16th Cardinal Scale 0 to 100% equilibrate to external temperature when exposed to large, rapid temperature changes and be kept 5 to 95% Readout indicatesnon-condensing direction to which the back of the unit is pointed when held in a vertical Readout indicates direction to which the back of the unit is pointed when held in a vertical Relative Humidity l l l l l l l l l l 3.0 %RH 0.1 %RH 0 to 100% equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift +/- 2% over 24 months. Humidity sensor may be recalibrated non-condensing orientation. Declination/variation adjustable for True North readout. orientation. Declination/variation adjustable for True North readout. out of direct sunlight. Calibration drift +/- 2% over 24 months. Humidity sensor may be recalibrated at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802). at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802). Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. 8.86 to 32.49 inHg 0.30 to 48.87 inHg Monolithic silicon piezoresistive pressure sensor with second-orderCALCULATED temperature correction. MEASUREMENTS 0.03 CALCULATED MEASUREMENTS Pressure sensor may be recalibrated at factory or in field. Adjustable reference altitude allows 8.86 to 32.49 inHg 0.30 to 48.87 inHg 300.0 to 1100.0 hPa|mbar 10.0 to 1654.7 hPa|mbar 0.03 3500 Pressure sensor may be recalibrated at factory4500 or in field. Adjustable reference altitude allows3500 4500inHg 0.01 inHg display of station pressure or barometric pressure corrected to MSL. Kestrel 4200 displays MEASUREMENT300.0 1000to 1100.02000 hPa|mbar2500 300010.0 to3500 1654.7 hPa|mbar4000 4200 4250 4300 4400MEASUREMENT4500 1000ACCURACY2000l 2500(+/-)* 3000l RESOLUTION3500l l l4000SPECIFICATIONl4200l 4250 lRANGE4300l 4400l SENSORS4500 EMPLOYEDACCURACY (+/-)*NOTES RESOLUTION4.35 to 15.95 PSI SPECIFICATION0.14 RANGE to 24.00 PSI SENSORS EMPLOYED NOTES inHg 0.01 inHg DT display of station pressure or barometricPressure HORpressure corrected tol MSL. Kestrel 4200l displaysl lDT l l l l l l 1.0 hPa|mbarHOR 0.1 hPa|mbar station pressure on a dedicated screen. Kestrel 2500 and 3500 display continuously updating 4.35 to 15.95 PSI 0.14 to 24.00 PSI and and Pressure l l l l l l l l l l 1.0 hPa|mbar 0.1 hPa|mbar station pressure on a dedicated screen. Kestrel 2500 and 3500 display continuously updating 0.01 PSI 0.01 PSI three-hour barometric pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly. and and 3 3 Temperature 3 32.0 to 185.03 °F 14.0 to 131.0 °F Temperature 0.01 PSI 0.01 PSI three-hour barometric pressure trend indicator: rising rapidly,0.0002 rising, lb/ft steady, falling,0.001 falling lbs/ftrapidly. Refer to Ranges for 0.0002 lb/ft 0.001 lbs/ft Refer to Ranges for Kestrel 4000 series displays pressure trend through graphing function. PSI display on Kestrel Air Density 32.0 to 185.0 °F 14.0 to 131.0 °F l l Air Density l l Relative Humidity Mass of air per unit0.0 to volume 85.0 °C -10.0 to 55.0 °C Relative Humidity Mass of air per unit volume Kestrel 4000 series displays pressure trend through graphing function.3 PSI display on Kestrel 3 Sensors Employed 3 3 Sensors Employed 4000 series only. 0.0 to 85.0 °C -10.0 to 55.0 °C 0.0033 kg/m 0.001 kg/m 0.0033 kg/m 0.001 kg/m 4000 series only. Pressure Pressure 1 cfm 1 cfm 2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of 2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy3 of 3 sensor dependent upon unit's vertical position. Self-calibration routine eliminates magnetic error 1 m /hr l l 1°Volume of air flowing1 m /hr through an opening. Automatically calculated from Air Velocity measurement Volume of air flowing through an opening. Automatically calculated from Air Velocity measurement sensor dependent upon unit's verticalCompass position. Self-calibration routine eliminates magnetic3 error Refer to Ranges for l l Air5° Flow 30 to 360° Refer to Ranges0 to for 360° fromAir batteries Flow or unit and must be run after every full power-down (battery removal or change). 1° Air Flow l Air Flow 6.71% 1 m /m l 1/16th6.71% Cardinaland Scale user-specified1 m /mduct shape (circle or rectangle) and dimensions (units: in, ft, cm or m). and user-specified duct shape (circle or rectangle) and dimensions (units: in, ft, cm or m). Compass l l 5° 0 to 360° 0 to 360° from batteries or unit and must be run after every full power-down (battery removal or change). Sensors Employed User Input (Duct Shape & Size) Sensors Employed User InputReadout (Duct indicates Shape & direction Size) to which the back of the unit is pointed when held in a vertical 1/16th Cardinal Scale 3 Maximum duct dimension3 input: 258.0 in | 21.5 ft | 655.3 cm | 6.55 m. Maximum duct dimension input: 258.0 in | 21.5 ft | 655.3 cm | 6.55 m. Readout indicates direction to which the back of the unit is pointed when held in a vertical0.1m /s 0.1m /s orientation. Declination/variation adjustable for True North readout. orientation. Declination/variation adjustable for True North readout. 1 L/s 1 L/s typical: 23.6 ft typical: 23.6 Heightft above Mean Sea Level ("MSL"). Temperature compensated pressure (barometric) Height above Mean Sea Level ("MSL"). Temperature compensated pressure (barometric) typical: 750 to 1100 mBar CALCULATED MEASUREMENTStypical: 750 to 1100 mBar 7.2 m 1 ft Pressure 7.2 m altimeter requires1 ftaccurate reference barometric pressure to produce maximumPressure absolute altimeter requires accurate reference barometric pressure to produce maximum absolute CALCULATED MEASUREMENTSAltitude l l l l l l l l l Altitudel l 3500l l l l l l 4500l l l MEASUREMENT 1000 2000max:2500 48.2 ft3000 3500 1 m4000 4200 4250 4300 4400 4500 User InputACCURACY (Reference (+/-)* Pressure)max:RESOLUTION 48.2 ftaccuracy. SPECIFICATIONBoth accuracy1 m specs RANGE correspondsSENSORS to a reference EMPLOYED pressureUser Input anywhereNOTES (Reference from Pressure) 850 to 1100 accuracy. Both accuracy specs corresponds to a reference pressure anywhere from 850 to 1100 3500 4500 DT max: 300 to 750 mBar HOR max: 300 to 750 mBar MEASUREMENT 1000 2000 2500 3000 3500 4000 4200 4250 4300 4400 4500 ACCURACY (+/-)* RESOLUTION SPECIFICATION RANGE SENSORS EMPLOYED NOTES 14.7 m 14.7 m mBar. mBar. DT HOR 3 3 Temperature 0.0002 lb/ft3 0.001 lbs/ft3 Refer to Ranges for Temperature l l 0.0002 lb/ft 0.001 lbs/ft Refer to Ranges for Relative Humidity Mass of air per unit volume 3 3 Temperature Air Density 0.07 inHg 0.01 inHg l l 3 0.07 inHg Air 3pressure 0.01that wouldinHg be present in identicalRelative conditions Humidity at MSL. StationMass pressure of air per compensated unit volume Air pressure that would be present in identical conditions at MSL. Station pressure compensated 0.0002 lb/ft 0.001 lbs/ft Refer to Ranges for Refer to Ranges for 0.0033Pressure kg/m3 0.001 kg/m3 Sensors Employed Refer to Ranges for Pressure Air Density l l l Relativel Humidityl l Massl of airl per unitl volumel l l l l l l l l l l l l Pressure 0.0033 kg/m3 Barometric0.001 kg/m3 PressureSensors Employed Barometric Pressure 2.4 hPa|mbar 0.1 hPa|mbar 2.4 hPa|mbarfor local elevation0.1 hPa|mbar provided by reference altitude. Requires accurate reference altitude to produce for local elevation provided by reference altitude. Requires accurate reference altitude to produce Pressure Sensors Employed User Input (Reference Altitude) 1 cfm Sensors Employed User Input (Reference Altitude) 0.03 PSI 0.01 PSI 0.03 PSI 3 maximum absolute0.01 PSI accuracy. maximum absolute accuracy. 1 cfm 1 m3/hr Volume of air flowing through an opening. Automatically calculated from Air Velocity measurement 1 m /hr Refer to Ranges for Air Flow Volume of air flowing through an opening. Automatically calculated from Air Velocity measurement 3 1 mph l 3 Refer1 mph to Ranges for Air Flow 1 m /hr Volume of air flowing through an opening.Air Flow Automatically calculated from Air Velocity measurement l 6.71% 1 m /m and user-specified duct shape (circle or rectangle) and dimensions (units: in, ft, cm or m). Refer to Ranges for Air Flow 3 Sensors Employed User Input (Duct Shape & Size) Air Flow l 6.71% 1 m3/m and user-specified duct shape (circle or rectangle) and dimensions (units: in, ft, cm or1 m).ft/min 0.1m3/s 1 ft/min Maximum duct dimension input: 258.0 in | 21.5 ft | 655.3 cm | 6.55 m. Crosswind &Sensors Employed User Input (Duct Shape & Size) Crosswind & Refer to Ranges for Wind Speed 0.1m /s Refer to Ranges for Wind Speed 3 Maximum duct dimension input: 258.0l in | 21.5l ft | 655.3 cm7.1% | 6.55 m. 0.1 km/h l l 7.1%1 L/sEffective wind0.1 relative km/h to a target or travel direction. Auto-switching headwind/tailwind indication. Effective wind relative to a target or travel direction. Auto-switching headwind/tailwind indication. Headwind/Tailwind0.1m /s Headwind/Tailwind Sensors Employed Compass 1 L/s Sensors Employed Compass 1 L/s 0.1 m/s typical: 23.6 ft 0.1 m/s Height above Mean Sea Level ("MSL"). Temperature compensated pressure (barometric) typical: 750 to 1100 mBar typical: 23.6 ft Height above Mean Sea Level ("MSL"). Temperature compensatedl pressure (barometric)l 0.1l knots l l l l l l l 7.2 m 1 ft 0.1 knots Pressure altimeter requires accurate reference barometric pressure to produce maximum absolute typical: 750 to 1100 mBar Altitude l l l l l l l l l l 7.2 m 1 ft Pressure altimeter requires accurate reference barometric pressure to produce maximum absolute max: 48.2 ft 1 m User Input (Reference Pressure) accuracy. Both accuracy specs corresponds to a reference pressure anywhere from 850 to 1100 Altitude l l l l l l l l l l Temperature max: 300 to 750 mBar Temperature max: 48.2 ft 1 m User Input (Reference Pressure) accuracy. Both accuracy specs corresponds to a reference3.2 pressure °F anywhere from 0.1850 °Fto 1100 Refer to Ranges for 14.7 m 3.2 °F Difference between0.1 °F dry bulb temperatureRefer to and Ranges wet bulb for temperature. WhenmBar. spraying, indicates Difference between dry bulb temperature and wet bulb temperature. When spraying, indicates Delta max:T 300 to 750 mBar l Delta T l Relative Humidity Relative Humidity 14.7 m mBar. 1.8 °C 0.1 °C Sensors Employed 0.07 inHg 1.8 0.01°C inHgevaporation rate0.1 and °C droplet lifetime.Sensors Safe range Employed for pesticide spraying Airis 4 pressure to 16 °F that / 2 would to 9 °C.be presentevaporation in identical rateconditions and droplet at MSL. lifetime. Station pressureSafe range compensated for pesticide spraying is 4 to 16 °F / 2 to 9 °C. 0.07Pressure inHg 0.01 inHg Refer to Ranges for Pressure Air Pressurepressure that would be present in identical conditions at MSL. Station pressure compensated Barometric Pressure l l l l l l l l l l 2.4 hPa|mbar 0.1 hPa|mbar Refer to Ranges for Pressure for local elevation provided by reference altitude. Requires accurate reference altitude to produce 0.07 inHg 0.01 inHg Air pressure that wouldBarometric be present Pressure in identical conditions at MSL. Station pressure compensated Specifications2.4 hPa|mbar 0.1 hPa|mbar Sensors Employed User Input (Reference Altitude)Chartfor local elevation provided by reference altitude. Requires accurate reference altitude to produce Refer to Ranges for Pressure Temperature Sensors Employed User Input (Reference Altitude) Temperature Barometric Pressure l l l l l l l l l l 2.4 hPa|mbar 0.1 hPa|mbar for local elevation provided by reference altitude. Requires accurate reference altitude to produce 0.03 PSI 0.01 PSI maximum absolute accuracy. Sensors Employed User Input (Reference Altitude)l l l l l l l 226 ft 1 ft l Referl to Rangesl forl l l l 226 ft Local air density1 converted ft to equivalent Refer toelevation Ranges above for sea level in a uniform layer consisting of Local air density converted to equivalent elevation above sea level in a uniform layer consisting of 0.03 PSI 0.01Density PSI Altitude maximum absolute accuracy.Density Altitude Relative Humidity Relative Humidity 69 m 1 m Sensors Employed 69 m1 mphthe International1 Standard m Atmosphere.Sensors Employed the International Standard Atmosphere. Pressure 1 ft/min Pressure 1 mph Sensors 1 ft/min Refer to Ranges for Wind Speed Crosswind & Refer to Ranges for Wind Speed 1 ft/min SENSORS 15 to 95 % RH l l 7.1% 0.1 km/hTemperatureSENSORS that a volume of air must15 be to cooled95 % RH to at constant pressure Effective for the wind water relative vapor to a targetTemperature or travel direction. that aAuto-switching volume of air headwind/tailwind must be cooled indication. to at constant pressure for the water vapor Crosswind & Refer to Ranges for Wind Speed Headwind/Tailwind 3.4 °F 0.1 °F Temperature 3.4 °F Sensors0.1 °F Employed Compass Temperature l l 7.1% 0.1 km/h Dewpoint l l 3500l l Effectivel lwind relativel to al target orl Dewpointtravel4500 direction.l Auto-switching headwind/tailwindl indication.l 3500l l Referl to Rangel forl l l 4500l 0.1 m/spresent to condense into dew and formRefer on to a Range solid surface. for Can also be considered to be the present to condense into dew and form on a solid surface. Can also be considered to be the Headwind/Tailwind SENSORSensors1000 Employed2000 2500 3000 3500Compass 4000 4200 4250 4300 4400 4500SENSOR 1000ACCURACY20001.9 °C 2500(+/-)* 3000RESOLUTION35000.1 °C 4000SPECIFICATION4200 4250 RANGE4300 4400 OPERATIONAL4500Relative Humidity RANGEACCURACY1.9 °C0.1 knots(+/-)*NOTES RESOLUTION0.1 °C SPECIFICATION RANGE OPERATIONALRelative Humidity RANGE NOTES 0.1 m/s DT HOR DT Temperature Sensor HOR 0.1 knotswater-to-air saturation temperature.Temperature Sensor water-to-air saturation temperature. 0.1 knots Temperature l 3.2 °F 0.1 °F Refer to Ranges for Difference between dry bulb temperature and wet bulb temperature. When spraying, indicates Temperature Delta T 0.1l m/s 0.6 to 40.0 m/s 0.6Wind to 60.0 Speed m/s 1 inch|25 mm diameter0.1 m/s impeller with precision0.6 to 40.0Relative axle m/s and Humidity low-friction Zytel®0.6Wind bearings. to 60.0 Speed m/s Startup speed 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed 3.2 °F 0.1 °F Refer to Ranges for Difference between dry bulb temperature and wet bulb temperature. When spraying, indicates 1.8 °C 0.1 °CThe rate at whichSensors moisture Employed is lost from the surface of curing concrete. Requiresevaporation user rate and droplet lifetime.The rateSafe at range which for moisture pesticide sprayingis lost from is 4 theto 16 surface °F / 2 to of 9 °C.curing concrete. Requires user l 2 Temperature 2 Pressure Temperature Delta T Relative Humidity Larger0.01 lb/ftof 3%2/hr of 0.011 ft/min b/ft /hr Refer118 to to 7,874 Ranges ft/min for 118 to 11,811 ft/minLarger0.01 lb/ftof 3%2/hr ofstatedmeasurement as lower0.01 1and limit,ft/min b/ft entry readings/hr of concrete mayRefer 118be temperature taken to to 7,874 Ranges down ft/minPressure obtained to for 0.4 m/s with | 79 an ft/min accurate118 | 1.5 to 11,811IRkm/h or probe| .9 ft/min mph | .8 kt measurementstated as lower and limit, entry readings of concrete may be temperature taken down obtained to 0.4 m/s with | 79 an ft/min accurate | 1.5 IRkm/h or probe| .9 mph | .8 kt 1.8 °C Evaporation0.1 °C RateSensors Employed evaporation rate andl dropletEvaporation lifetime. Safe Rate range for pesticide spraying is 4 to 16 °F / 2 to 9 °C. l Relative Humidity Relative Humidity Pressure reading, least 0.1 km/h2 Sensors2.2 to 144.0 Employed km/h 2.2 to 216.0 km/hreading, leastafterthermometer impeller (°F0.1startup. orkm/h °C,2 Off-axis not included). accuracySensors2.2 Readings to -1% 144.0 Employed @Temperature should5ºkm/h off-axis; be taken -2% 20@ 10º;inches2.2 -3% to above 216.0@ 15º. pour km/h Calibration surface thermometerafter impeller (°Fstartup. or °C, Off-axis not included). accuracy Readings -1% @ should5º off-axis; be taken -2% 20@ 10º;inches -3% above @ 15º. pour Calibration surface Wind Speed | Air Flow l l l l l l l l l l Windl Speedl | Air Flowl l 0.06 kg/m2/hrl l l 0.01l kg/m l/hrl l l l l l l l ll ll l 226l ft 0.06 kg/m2/hr1 ft 0.01 Refer kg/m to Ranges/hr for Local air density converted to equivalent elevation above sea level in a uniform layer consisting of Temperature Density Altitude l l l l l l l Pressure Relative Humidity Pressure 226 ft 1 ft Refer to Ranges for Local air density converted to equivalent elevation significantabove sea level digit in or a 20uniform layer 0.1consisting mph of 1.3 to 89.5 mph 1.3 to69 134.2 m significantmph digit1 mordriftwith 20

Perceived temperature resulting from combined effect of wind speed and temperature. Calculated Perceived temperature resulting from combined effect of wind speed and temperature. Calculated 1.6 °F 0.1 °F Refer to Ranges for Wind Speed 1.6 °F based on the NWS0.1 °F Wind Chill TemperatureRefer to Ranges (WCT) forIndex, revised 2001, Windwith wind Speed speed adjusted based on the NWS Wind Chill Temperature (WCT) Index, revised 2001, with wind speed adjusted Wind Chill l l l l l l l l l Windl Chilll l l l l l l l l l l l 0.9 °C 0.1 °C Sensors Employed Temperature 0.9 °C by a factor of 1.50.1 to °C yield equivalentSensors results toEmployed wind speed measured at 10Temperature m above ground. by a factor of 1.5 to yield equivalent results to wind speed measured at 10 m above ground. Measurement range limited by extent of published tables. Measurement range limited by extent of published tables. ADDITIONAL SPECIFICATIONS ADDITIONAL SPECIFICATIONS l l l Reflectivel l3 1/2 digit LCD.l Digit height 0.36 in / 9 mm. Aviation green electroluminescent backlight. ManualReflective activation 3 1/2 digit with LCD. auto-off. Digit height 0.36 in / 9 mm. Aviation green electroluminescent backlight. Manual activation with auto-off. Display & Backlight l l l Display & Backlight Reflective 5 digit LCD.l Digit heightl 0.36 inl / 9 mm. Choice of aviation green or visible red (NV modelsReflective only) electroluminescent 5 digit LCD. Digit backlight. height 0.36 Manual in / 9 activationmm. Choice with of auto-off. aviation green or visible red (NV models only) electroluminescent backlight. Manual activation with auto-off. l l l l l l l Multifunction, multi-digit monochrome dot-matrix display.l l Choicel of aviationl greenl or visiblel redl (NVMultifunction, models only) multi-digitelectroluminescent monochrome backlight. dot-matrix Automatic display. or Choicemanual ofactivation. aviation green or visible red (NV models only) electroluminescent backlight. Automatic or manual activation. All measurements except those based on relative humidity respond accurately within 1 second. RelativeAll measurements humidity and all except measurements those based which on relativeinclude humidityRH in their respond calculation accurately may require within 1as second. long as Relative 1 minute humidity to fully and all measurements which include RH in their calculation may require as long as 1 minute to fully Response Time l l l l l l l l l l lResponsel Timel l l l l l l l l l l l l l & Display Update & Display Update equilibrate to a large change in the measurement environment. Display updates every 1 second. equilibrate to a large change in the measurement environment. Display updates every 1 second. l l l l l l One-buttonl l clear andl restartl of Maxl Windl Gust and Average Wind measurement. One-button clear and restart of Max Wind Gust and Average Wind measurement. Max/Avg Wind Max/Avg Wind Max and average wind calculation may be started and stopped independently of data logging of otherMax values, and averagealong with wind all other calculation wind-related may be functions: started and air stopped velocity, independently crosswind, headwind/tailwind, of data logging of wind other chill, values, WBGT, along with all other wind-related functions: air velocity, crosswind, headwind/tailwind, wind chill, WBGT, l l l l l l l l l l l l l l TWL, evaporation rate. TWL, evaporation rate. l l l l l l l l l l l l l l Data Storage & Graphical Data Storage & Graphical Minimum, maximum, average and logged history stored and displayed for every measured value. LargeMinimum, capacity maximum, data logger average with graphicaland logged display. history Manual stored andand autodisplayed data storage.for every Min/Max/Avg measured value. history Large may capacity be reset data logger with graphical display. Manual and auto data storage. Min/Max/Avg history may be reset Display, Min/Max/Avg 4000 3200 3200 3600Display,2300 Min/Max/Avg2900 2500 independently. Auto-store interval settable from4000 2 seconds3200 to 123200 hours,3600 overwrite2300 on or2900 off. Logs2500 evenindependently. when display Auto-store off except interval for 2 and settable 5 second from intervals 2 seconds (code to 12version hours, 4.18 overwrite and later). on or Data off. Logscapacity even shown. when display off except for 2 and 5 second intervals (code version 4.18 and later). Data capacity shown. History points points points points points pointsHistorypoints points points points points points points points Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Data Upload & Bluetooth® Data Upload & Bluetooth® l l l l l l l Bluetooth Data Transfer Option: Adjustable powerl consumptionl l andl radio rangel froml up tol 30 ftBluetooth | 9 meters. Data Individual Transfer unit ID Option: and 4-digit Adjustable PIN code power preprogrammed consumption for and easy radio identification range from andup to data 30 ftsecurity | 9 meters. when Individual unit ID and 4-digit PIN code preprogrammed for easy identification and data security when Data Connect Option Data Connect Option pairing and transmitting. Employs Bluetooth Serial Port Protocol for data transmission. pairing and transmitting. Employs Bluetooth Serial Port Protocol for data transmission. l l l l l l Requiresl optionall lPC interfacel (USBl or RS-232)l or Bluetooth data transfer option and provided software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Clock / Calendar Clock / Calendar l l l l l l l Requires optional PC interface (USB or RS-232)l or Bluetoothl datal transferl optionl andl providedl software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. l l l l l l Requiresl optionall lPC interfacel (USBl or RS-232)l or Bluetooth data transfer option and provided software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Auto Shutdown Auto Shutdown l l l l l l l Requires optional PC interface (USB or RS-232)l or Bluetoothl datal transferl optionl andl providedl software.Requires optional PC interface (USB or RS-232) or Bluetooth data transfer option and provided software. Languages l l l l l Languagesl l English, French, German, Italian, Spanish. l l l l l l l English, French, German, Italian, Spanish. Certifications l l l l l l l l l l l Certificationsl l CEl certified,l RoHSl and WEEEl compliant.l l Individuallyl testedl to NIST-traceablel l lstandardsl (writtenl certificateCE certified, of tests RoHS available and WEEE at additional compliant. charge). Individually tested to NIST-traceable standards (written certificate of tests available at additional charge). Origin l l l l l l l l l l l l Originl Designedl land manufacturedl l in thel USA froml USl and importedl components.l l Compliesl lwith Regionall Designed Value Content and manufactured and Tariff Code in the Transformation USA from US requirements and imported forcomponents. NAFTA Preference Complies Criterionwith Regional B. Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B. l l l l l l CR2032,l one,l included.l Averagel llife, 300l hours. Battery life reduced by backlight use in 2000 to 3500CR2032, models. one, included. Average life, 300 hours. Battery life reduced by backlight use in 2000 to 3500 models. Battery Life Battery Life l l l l l l l Standard Models: AAA Alkaline, two, included. lAveragel life, 400l hoursl of use,l reducedl by backlightl Standard or Bluetooth Models: radio transmissionAAA Alkaline, use. two, included. Average life, 400 hours of use, reduced by backlight or Bluetooth radio transmission use. Shock Resistance l l l l l l l l l l Shockl Resistancel l MIL-STD-810g,l l Transitl Shock,l Methodl 516.5l Procedurel l IV; unitl only; impactl mayl damagel replaceablel MIL-STD-810g, impeller. Transit Shock, Method 516.5 Procedure IV; unit only; impact may damage replaceable impeller. Sealing l l l l l l l l l l l l Sealingl Waterproofl l (IP67 land NEMA-6).l l l l l l l l l l Waterproof (IP67 and NEMA-6). 14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature14° F to 131° range F | -10 of °Cthe to display 55 °C and Measurements batteries by maintainingmay be taken the beyond unit within the limits the operational of the operational range and temperature exposing rangeit of the display and batteries by maintaining the unit within the operational range and exposing it Operational Temperature l l l l l l l l l Operationall l Temperaturel l l l l l l l l l l l l l l Limits Limits to the more extreme environment for the minimum time necessary to take reading. to the more extreme environment for the minimum time necessary to take reading. Storage Temperature l l l l l l l l l l Storagel Temperaturel l -22.0l °F tol 140.0 °Fl | -30.0l °C to l60.0 °Cl l l l l l l l -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C l l l l l l 4.8l x 1.9 xl 1.1 in / l12.2 x 4.8l x 2.8l cm, 3.6l oz / 102 g (including slip-on cover). 4.8 x 1.9 x 1.1 in / 12.2 x 4.8 x 2.8 cm, 3.6 oz / 102 g (including slip-on cover). Size & Weight l l l l Sizel & Weightl 5.0 x 1.8 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 3.6 oz / 102l g. l l l l l 5.0 x 1.8 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 3.6 oz / 102 g. l 6.5 x 2.3 x 1.1 in / 16.5 x 5.9 x 2.8 cm, 4.4 oz / 125 g. l 6.5 x 2.3 x 1.1 in / 16.5 x 5.9 x 2.8 cm, 4.4 oz / 125 g. * NOTE: Accuracy calculated as uncertainty of the measurement derived from statistical* NOTE: analysis Accuracy considering calculated the as comineduncertainty effects of the from measurement primary sensor derived specifications, from statistical circuit analysis conversions, considering and allthe other comined sources effects of error from using primary a coverage sensor specifications, factor of k=2, circuitor two conversions,standard deviations and all (2Σ).other sources of error using a coverage factor of k=2, or two standard deviations (2Σ).