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Competence in , solids and level measurement Cost-saving solutions for control, monitoring and quality assurance Liquid analysis solutions

Endress+Hauser is a global provider of Endress+Hauser has been a specialist in degree of automation in almost every pro- solutions for process automation. analysis measuring technology for the duction area, Endress+Hauser has achieved For production and logistics, the com- environment and process for over a great vertical range of production. As a pany develops sensors and systems which 30 years. The extraordinarily high number result, the client receives high and constant retrieve, transmit and process informa- of research and development product quality as as excellent delivery tion from the processes. Future-oriented guarantees the efficiency, performance and reliability for all standard products and for services, and products excelling both in high quality of the products. The latest individual products tailored to suit special terms of price and performance, support technology for safe processes can be made applications. Measuring technology from the competitiveness of clients thanks to permanently available to the user. Endress+Hauser stands for reliable meas- the highest degree of quality, safety and By mastering all technically demanding ured values, a high degree of availability efficiency. processing steps, in conjunction with a high and long operating times.

Competence in turbidity, solids and sludge level measurement

The focus is on solutions for the and 90° scattered light measurement method in measurement. As an alternative, ultrasonic sectors. Here, it does not matter conformity with DIN/ISO, Endress+Hauser methods can also be used here to determine whether the turbidity is being measured in is offering you a universal sensor system the height of the in a basin or the waterworks downstream of a filter suitable for the most common applications. tank by measuring the time-of-flight of the in the limit range of the optical measuring The product portfolio is extended with ultrasonic signal. technology or whether the solids content sensors based on the 4-beam alternating is being measured in thickened light method, working with absorption, sludge which can almost no longer be 90° scattered light or backscattered light, pumped – Endress+Hauser's sensors cover depending on the measuring range. These a wide range of applications. So with the optical sensors are also used for sludge level

2 3 Research and development pay off

Numerous awards for are CUS1, CUS3 and CUS4 sensors which proof of the tradition of research and are continued and developed further in development at Endress+Hauser. This the 2nd generation as CUS31 and CUS41. R&D goes back a long time in turbidity But the sensor technology is not the only and solids measurement. In addition to thing that is state of the art; the fully pH and conductivity, turbidity has become automatic calibration stand to DIN/ISO the third largest parameter in analysis which all sensors have to pass through after measuring technology and continues to manufacture sets standards worldwide. grow. The success story all began with the

Flexible measuring point concept

Thanks to their design, turbidity and solids CUA250 flow assembly or the CUA451 ball sensors from Endress+Hauser are suitable valve retractable assembly. The Liquisys M for installation in pipes or tanks as well CUM2x3 transmitter is available as panel as for immersion applications at basins or field housing. The transparent operating or channels. A wide range of assemblies concept corresponds to the Liquisys place the sensor safely in the process, be transmitters for the parameters , it with the CYY105 immersion tube, the , pH or conductivity.

2 3 Turbidity measurement in

Turbidity measurement in the drinking undissolved materials present, turbidity water sector is an important parameter describes a visually detectable feature for quality. The legislation in almost every for the consumer. All the necessary steps country in the world stipulates a limit involved in drinking can value for this turbidity which may not be monitored and controlled by turbidity be exceeded. As a sum parameter for all measurement.

DIN/ISO 7027 CUY22 check unit At an angle of 90°, the CUS31 turbidity CUS31/41 sensors are supplied with a sensor measures the light scattered by long-term stable factory calibration. The particles present in the water. The optical CUY22 check unit is used to verify the arrangement corresponds to the standard calibration from time to time. Its black specified in the DIN/ISO 7027 relevant to plastic body functions as light creating turbidity measurement. definite conditions when it is placed on the sensor .

CUS31 sensor with CUY22 check unit

4 5 Liquisys M CUM223/253 transmitter Working principle • Modes of operation: FNU, NTU, %, g/l, mg/l, ppm • Two-line display with measured value and display • Optionally with 2/4 contacts (limit contacts, P(ID) controller, timer) • Optionally with Profibus PA or HART®

CUS31 turbidity sensor As a highly sensitive resolution of 0.001 wiper to protect against the formation of FNU is used for measuring in drinking or other layers such as manganese, water in the fine turbidity range, the or lime deposits on the optics. The assembly used plays a crucial role. It must CUS31 is calibrated at the factory to create defined environmental conditions DIN/ISO 7027 and delivered as such and for the sensor to prevent disturbing effects can be put into operation immediately. The such as air bubbles and wall reflection. calibration is stable over a long term and Two different assemblies are available for is stored in such a way that it is protected this purpose and can be ordered with the from overwriting. In every operating mode, sensor. The “S-assembly” has a patented two additional data records are available gas bubble trap. However, if no air bubbles which can be edited by customers if they Patented are present in the fluid, the cheaper “E- want customised calibration. The CUY22 gas bubble trap assembly” can be used. As an additional check unit is used to check the sensor. option, CUS31 can be supplied with a

Working principle of turbidity measurement based on the scattered light method

Turbidity particles scatter the infrared light emitted which is then received by two photo receivers. A reference LED compensates fluctuations of intensity of the light source.

4 5 Turbidity and solids measurement in wastewater

In the area of wastewater, turbidity and treatment plant outlets, turbidity and solids measurement are used in a wide solids sensors help monitor and control variety of applications. From primary the processes. In industry too, they also sludge removal and sludge dewatering monitor the dirt loads passed into the to basins and sewage drain channels.

Sludge level • CUM750 Solids Sludge level • CUS70 Sludge level • CUM740 Sludge level • CUM750 • CUM750 Solids • CUS65-A • CUC101 • CUS70 • CUS70 • CUM223/253 • CYY105 • CUS41 Sewage • CUA451 treatment Thickener plant inlet Dewatering Disposal Secondary Primary clarification Sludge activation clarification Solids • CUM223/253 Thickener • CUS41 Solids Solids • CUA451 • CUM223/253 • CUM223/253 • CUS41 • CUS41 Turbidity • CUA451 • CUA451 • CUM223/253 • CUS41-W Outlet • CYY105

CUS41 turbidity and solids sensor With a measuring range of 0.00 to 9999 CUS65 turbidity and solids sensor FNU or 0.0 to 300 g/l suitable for all The CUS65 sensor works using the applications, the CUS41 is a universal 4-beam alternating light method. The sensor for plants and advantage of this method is the fact that it is for the industrial sector. Like the CUS31, not sensitive to any of the aeration systems it measures at a 90° scattered light angle used in sewage treatment which can using infrared light. The wavelength of affect the accuracy of the sensor. Similarly, 860 nm used means that the sensor is contamination of the optics and ageing insensitive to the effects of colour or dye of the two light sources is automatically from the fluid. For turbidity measurement, compensated by the measuring principle. the CUS41 is calibrated at the factory in The sensor body is made of stainless steel. conformity with DIN/ISO 7027 and can As a result, no electric charges can be used immediately. However, if the client to material becoming attached to the wants to perform solids measurement in sensor surface even if used in g/l or %, a simple menu-guided 3-point processes. Various sensor heads are calibration is available which clients can use available depending on the measuring range to adapt the sensor to their fluids. required.

Working principle The two LEDs in the sensor head 4-beam alternating alternately transmit a short light pulse. light method The light intensity is weakened by particles in the medium. The remaining light is detected at the two photo diodes. These measured light intensities are converted into proportional frequencies. This method compensates wearing of the light sources and soiling of optical components.

6 7 CUR4 spray head • For cleaning CUS31/CUS41 • Can be used with immersion assemblies in open channels or basins • Can be easily fitted on the sensor body

Liquisys M CUM223/253 CUM740 transmitter Wall retainer for transmitter • For CUS65 immersion tubes • For CUS31/CUS41 • Modes of operation: %, g/l, • For mounting CYY105 or • Modes of operation: FNU, mg/l, ppm, FNU, NTU CYA611 NTU, %, g/l, mg/l, ppm • Four contacts (sensor rinsing, • Can also be secured to railings • Two-line display with error message, with counter (51512992) measured value and 2 can be freely configured) • Immersion tube with securing temperature display • One or two version slots can be removed in one go • Optionally with 2/4 contacts (limit contacts, P(ID) controller, timer) • Optionally with Profibus PA or HART® CYY105 Dipfit immersion tube • Robust stainless steel version • For open basins and channels • G1 threaded connection • Sensor orientation to suit installation conditions (straight, 45° or 90° angle) • 2 m and 3.5 m

CUA250 Flowfit flow assembly • For CUS31/CUS41 Welding rinse socket • For industrial water and DN 65 complete (51500912) sewage water with turbidity • For automatically > 1 FNU cleaning CUS31/CUS41 • Can be retrofitted with in the process CUR3 spray head • Can be installed in pipes or tanks CUA120 flange adapter • To be used in conjunction • For CUS31/CUS41 with CUA451 • For securely installing sensors in tanks and pipes CYA611 Dipfit immersion tube • Immersion assembly in PVC version • For open basins and channels CUA451 Cleanfit ball valve • Retrofittable spray cleaning for retractable assembly attaching (50086336) • Safe up to 10 bar, can be • Length 1630 mm operated manually up to 2 bar • Sensor inspection and cleaning without interrupting the process • Rinse water connection or external cleaning system CYH101 universal suspended Ü Cleaning possible in every assembly retainer operating position • Stainless steel column for • Rinse water connection can securing transmitter and im- also be used as sealing water mersion tube unit • Incl. CYY101 weather protec- • Robust stainless steel version tion cover • Fixed and oscillating method of securing immersion tube

6 7 Turbidity and solids measurement in the primary sector

In the concrete industry, the residual sensor. processes in the sand and water of a plant as well as the rinse and gravel industry can also be monitored are recycled for concrete with this sensor. Since the washing water manufacture. Since this water contains a is circulated, flocculants are used for constantly changing proportion of cement, rapid sludge sedimentation. The CUS41 the plant operator has to constantly adjust determines the correct dosing depending the recipe of the new aggregate. The plant on the solids content. It also monitors operator determines the apparent density of the sedimentation process at the clarified the water with the aid of the CUS41 solids water outlet.

8 9 Liquisys M CUM223/253 transmitter • For CUS31/CUS41 • Modes of operation: FNU, NTU, %, g/l, mg/l, ppm, kg/l, t/m3 • Application-specific concentration table can be programmed • Two-line display with measured value and temperature display • Optionally with 2/4 contacts (limit contacts, P(ID) controller, timer) • Optionally with Profibus PA or HART®

CUA451 Cleanfit ball valve CUS41 turbidity and solids retractable assembly sensor • Safe up to 10 bar, can be • Large measuring range operated manually up to 2 0.00 – 300 g/l bar • Scratch-proof sapphire • Sensor inspection and window cleaning without interrupting • Simple 3-point calibration the process • Wiper cleaning integrated or • Rinse water connection or can be retrofitted external cleaning system Ü Cleaning possible in every operating position • Rinse water connection can also be used as sealing water unit • Robust stainless steel version

CUR4 spray head Wall retainer for CYY105 Dipfit immersion • For cleaning immersion tubes tube CUS31/CUS41 • For mounting CYY105 or • Robust stainless steel version • Can be used with immersion CYA611 • For open basins assemblies in open channels • Can also be secured to and channels or basins railings with counter bar • G1 threaded connection • Can be easily fitted on the (51512992) • Sensor orientation sensor body • Immersion tube with secur- to suit installation conditions ing slots can be removed in (straight, 45° or 90° angle) one go • 2 m and 3.5 m

8 9 Sludge level measurement

Endress+Hauser offers optoelectronic thickeners allows optimised operation of and ultrasonic measuring systems for downstream sludge dewatering, e.g. using sludge level measurement. centrifuges. Continuous sludge profile measurement in In many processes in process , the secondary clarification basins controls suspensions are split into their solid and exact secondary sludge and return sludge liquid parts by means of sedimentation. removal. Water or dilute sludge is prevented from In addition, imminent sludge is entering the thickener and digester by also detected at an early stage. installing sludge level measurement in the sludge funnels of the primary clarification Applications: and secondary clarification basins. This has • Wastewater clarification a positive effect on the gas yield and on the • Water treatment hydraulic load of the sludge treatment. • Controlled sludge removal from the • Chemicals industry

Optoelectronic sludge profile measurement in secondary clarification CUC101

Optoelectronic measuring system for sludge level and sludge concentration

CUC101 Optoelectronic measuring system • Use in secondary clarification and flotation plants • Direct, continuous concentration measurement by means of immersion probe • Parallel concentration and height measurement for sludge profile analysis • Easy configuration, calibration and setting by means of menu-guided user interface • Illuminated display • Probe safety position with measured value hold functions if scraper in use • Probe with four beam alternating light technology

10 11 12 CUM750 CUS70 Ultrasonic measuring system for sludge level

Ultrasonic sludge level measurement in thickener

CUM750 ultrasonic transmitter • Use in primary clarification and thickeners • Multi-channel versions for parallel measurement in up to four basins • Simple configuration, calibration and setting using menu-guided user interface • Illuminated multi-function monitor for graphic and numeric display

CUS70 ultrasonic sensor • Sensor range at small emitting angle up to 100 m • No moving parts • Insensitive to floating sludge • Minimum effort required for installation

10 11 12 Sensor selection aid

Sectors CUS31 CUS41 CUS65-A CUS65-B CUS65-C CUS65-D CUS65-E

Drinking water •

Industrial water •

Wastewater • • Sludge activation • Secondary clarification • • Primary sludge • • • Return sludge • • Digested sludge • • Outlet • Concrete residual water • Gravel washing water • • Sewage water • • • Recommended

Clarify measuring range and application conditions

Selection aid for sludge level measuring systems

System Application Properties

CUC101 Fibre-free media: • Continuous concentration measurement Optoelectronic measurement • Activated sludge • Sludge profile recording • suspensions and particles • Applicable up to a basin depth • Detects also diffuse sludge level zones of 11 metres

CUM750/CUS70 Media containing fibres and coarse particles: • Insensitive to soiling Ultrasonic measurement • Primary/raw sludge • Up to four sensors per transmitter • Floating sludge • Applicable up to a basin depth • Sharply defined separation zone of 100 metres

10 11 12 Technical features

Specification CUS31 CUS41 CUS65-A CUS65-B CUS65-C CUS65-D CUS65-E

Optical 90° scattered 90° scattered Transmitted Transmitted Transmitted 90° scattered 180° scattered process light light light light light light light

Optical design 1T / 2R 1T / 2R 4-beam AL 4-beam AL 4-beam AL 4-beam AL 4-beam AL

Wavelength 880 nm 880 nm 880 nm 880 nm 880 nm 880 nm 880 nm

In conformity with DIN/ISO7027 • • • Modes of FNU, NTU, FNU, NTU, ppm,mg/l, g/l, % g/l, % FNU, NTU, g/l, % operation ppm, ppm, g/l, % ppm, mg/l mg/l, g/l, % mg/l, g/l, %, kg/l, t/m3 FNU, NTU 0.000 - 9999 0.00 - 9999 1.0 - 1000 measuring range g/l measuring 0.0 - 3 * 0.0 - 300 * 0.0 - 12 0.0 - 40 0.0 - 50 10.0 - 150 range ppm, mg/l 0.00 - 3000 * 0.00 - 9999 * 100 - 10.000 1 - 1000 measuring range

Transmitter CUM223/253 CUM223/253 CUM740 CUM740 CUM740 CUM740 CUM740

With sensors CUS65-A, CUS65-B and * Referred to SiO CUS65-C, the measuring range data refer to 2 activated sludge. This value can be reduced by 30-50 % in other fluids such as primary sludge, for example.

1T / 2R = 1 transmitter / 2 receivers 4-beam AL = 4-beam alternating light

03.04/MSC Instruments International

Endress+Hauser GmbH+Co. KG Instruments International P.O. Box 2222 79574 Weil am Rhein Germany Tel. +49 7621 975 02 Fax +49 7621 975 345 http://www.endress.com [email protected]

FA 033C/07/en/03.04 51515748 DT/INDD 2.0 13 Supplementary documentation

Technical Information

TI 176C Turbimax W CUS31 50088400 TI 177C Turbimax W CUS41/CUS41-W 50088402 TI 370C Turbimax W CUS65 51512873 TI 200C Liquisys M CUM223/253 51500283 TI 232C CUM740 51504297 TI 369C Cleanfit CUA451 51512836 TI 166C Dipfit W CYA611 50085985 TI 092C CYH101 50061228 TI 046C Chemoclean CYR10/CYR20 50014223 TI 160C CUC101 50084213 TI 225C CUM750/CUS70 51503544 KA 226 CUY22 51505985

03.04/MSC Instruments International

Endress+Hauser GmbH+Co. KG Instruments International P.O. Box 2222 79574 Weil am Rhein Germany Tel. +49 7621 975 02 Fax +49 7621 975 345 http://www.endress.com [email protected]

FA 033C/07/en/03.04 51515748 DT/INDD 2.0 13