3-Color Display RoHS Electromagnetic Digital Flow Switch Applicable fluid Water, Water-soluble coolant Actual size Compact Lightweight The oval fluid 56 mm passage enables the width to be 340 g reduced. (LFE1m3) 40 mm New An insulated type has been added. Positive ground Negative ground 2 types of ground are available. A close proximity setting is available. ¡ Fluctuation of the displayed value can be reduced when the close proximity setting function is used. ¡ Reduced setting time ∗ Not available for the remote type Variations Flow range Integrated display type/Remote type 0.5 L/min 2 L/min 5 L/min 10 L/min 20 L/min 50 L/min 100 L/min 200 L/min LFE1 Rated flow range Display flow range LFE1mZ LFE2 Rated flow range Display flow range LFE2mZ LFE3 Display flow range Rated flow range LFE3mZ LFEm Series CAT.ES100-107D 3-Color Display Electromagnetic Digital Flow Switch LFEm Series New An insulated type has been added. The ground doesn’t need Marking (Blue) to be selected when wiring. Insulated type/LFEmZ Non-insulated type/LFEm The piping port is insulated The piping port is connected to the with the power supply. negative ground of the power supply. PositivePositive ground ground PositivePositive ground ground 2424 V V 2424 V V PipingPiping port port PipingPiping PipingPiping port port PipingPiping InsulationInsulation GroundGround (0 (0V) V) GroundGround (0 (0V) V) ElectricElectric potential potential GroundGround (0 (0V) V) differencedifference GroundGround (−24 (−24 V) V) ShortShort NegativeNegative ground ground NegativeNegative ground ground 2424 V V 2424 V V InsulationInsulation GroundGround (0 (0V) V) GroundGround (0 (0V) V) GroundGround (0 (0V) V) GroundGround (0 (0V) V) Pressure loss: 0.02 MPa or less Reverse flow can be detected. Pressure loss [MPa] Reverse flow error display 0.05 Reverse flow error (Code LLL) 0.04 0.03 0.02 Reverse flow 0.01 0 50 100 Flow rate [L/min] Repeatability: ±1.5% F.S. A zero-reset setting is available. (Analog output) The display can be adjusted to zero. Operating fluid temperature: 0 to 85°C Made to Order p. 19 Piping connection ports: Stainless steel 304 ∗ Integrated display type only 1 3-Color Display Electromagnetic Digital Flow Switch LFEm Series Flow direction can be 3-color/2-screen changed after installation. display ¡Default flow direction OUT (Forward direction) Instantaneous flow rate is displayed. IN Customer’s flow direction ¡Flow direction can be changed after installation. The parameters below can be set. ¡Set value ¡Flow direction ¡Accumulated value ¡Line name ¡Peak/Bottom value Forward direction Reverse direction (Left to right) (Right to left) IN OUT Application Examples Flow control for Flow control for water-soluble coolant Flow control for cooling water for pressurized cooling metal molds water for welding guns Principle Faraday’s law of induction Fluid velocity (V) Measure the volume flow of inductive liquids by applying Coil Faraday’s law of induction: “when a conductive object is Fluid passage/ moved through a magnetic field, an electromotive force will Piping be generated.” Fluid Electrode The electromotive force (E) is proportional to the fluid velocity (V) multiplied by the magnetic flux density (B). The volume flow is calculated by converting the measured Electromotive force (E) electromotive force (E). An oval fluid passage is used to improve themagnetic flux density (B) generated by small amounts of current. Magnetic flux density (B) 2 Flow Switch for Fluid Variations Applicable Detection Smallest Rated flow range [L/min] Series settable Enclosure∗1 Display fluid method increment 0 0.5 2 5 10 20 30 40 50 100 150 200 250 LFE 0.1 L/min 0.5 20 Water, 3-color Water-soluble Electromagnetic 0.5 L/min IP65 2.5 100 display coolant 1 L/min 5 200 PF3W-Z 0.01 L/min 0.5 4 Water, 0.1 L/min 2 16 Ethylene Karman 3-color glycol IP65 vortex display aqueous solution 0.1 L/min 5 40 1 L/min 10 100 PF3W-L-Z 0.01 L/min 0.5 4 Water, 0.1 L/min 2 16 Ethylene Karman 3-color glycol IP65 vortex display aqueous solution 0.1 L/min 5 40 1 L/min 10 100 PF3W721-L Water, Karman 3-color Ethylene glycol 2 L/min IP65 50 250 aqueous solution vortex display PF3W 0.01 L/min 0.5 4 0.1 L/min 2 16 Water, Ethylene Karman 3-color glycol 0.1 L/min IP65 5 40 vortex display aqueous solution 1 L/min 10 100 2 L/min 50 250 PVC piping type Water, 1 L/min 10 100 Ethylene Karman 3-color glycol IP65 vortex display aqueous solution 2 L/min 30 250 PF2D 0.05 L/min 0.4 4 Deionized water (pure water), Karman 1-color Liquids which 0.1 L/min IP65 1.8 20 vortex display do not corrode nor erode fluoropolymer 0.5 L/min 4 40 ∗1 For the remote type monitor unit, only the front side is IP65 compliant. The other parts are IP40 compliant. 3 CONTENTS 3-Color Display Electromagnetic Digital Flow Switch LFE Series 3-Color Display Digital Flow Monitor LFE0 Series 3-Color Display Electromagnetic Digital Flow Switch LFE Series How to Order ·································································································································· p. 5 Specifications (Integrated Display Type) ········································································ p. 6 Specifications (Remote Type) ······························································································· p. 7 Flow Rate Characteristics (Pressure Loss) ································································ p. 8 Internal Circuits and Wiring Examples ··········································································· p. 9 Parts Description ······················································································································ p. 10 Fluid Passage Structure ······································································································· p. 10 Dimensions ··································································································································· p. 11 3-Color Display Digital Flow Monitor LFE0 Series How to Order ······························································································································· p. 12 Specifications (Remote Type Monitor) ········································································ p. 13 Internal Circuits and Wiring Examples ········································································ p. 14 Parts Description (Remote Type Monitor) ································································· p. 15 Dimensions ··································································································································· p. 16 Function Details ······························································································································· p. 17 Made to Order ··································································································································· p. 19 Specific Product Precautions ·································································································· p. 20 Safety Instructions ············································································································ Back cover 4 3-Color Display Electromagnetic Digital Flow Switch RoHS LFE Series Integrated display type How to Order Non-insulated type Insulated type Insulated type LFE 1 A 3 Z The piping port is insulated with the power supply. Remote type monitor Non-insulated type 1 A 3 Remote type For details, refer LFE to page 12. The piping port is connected to the negative ground of the power supply. Rated flow range Symbol Rated flow range Made to order (Refer to page 19.) 1 0.5 to 20 L/min Symbol Description 2 2.5 to 100 L/min X8 Piping connection ports: Stainless steel 304 3 5 to 200 L/min Output specifications Option Insulated Non-insulated Lead wire and M12 Symbol OUT1 OUT2 Symbol Bracket Display unit type type connector (Length 3 m) A NPN NPN VV Nil V — L/min B PNP PNP VV 1 — — L/min Integrated C NPN Analog 1 to 5 V VV V V L/min display 2 NPN Analog 4 to 20 mA VV type D 3 — V L/min E PNP Analog 1 to 5 V V — 4∗1∗2 V — gal/min F PNP Analog 4 to 20 mA V — 5∗1∗2 — — gal/min Remote J∗1 — Analog 1 to 5 V VV 6∗1∗2 V V gal/min type K∗2 — Analog 4 to 20 mA VV 7∗1∗2 — V gal/min ∗1 J: Select when used in combination with a digital flow monitor. ∗1 Options 4, 5, 6, and 7, which are not in SI units, are not for ∗2 K: Cannot be used in combination with a digital flow monitor use in Japan due to the New Measurement Act. ∗2 Options 4, 5, 6, and 7 cannot be selected when the output specification is J or K. Port size Reference: 1 [L/min] = 0.2642 [gal/min] Applicable model 1 [gal/min] = 3.785 [L/min] Symbol Port size LFE1 LFE2 LFE3 3 3/8 V —— 4 1/2 V —— 6 3/4 — V — 8 1 — — V Thread type Symbol Type The close proximity setting and zero-reset functions are only Nil Rc available for the integrated display type. For the remote type, the close proximity setting and zero-reset N NPT functions cannot be used. F G Options/Part Nos. When only optional parts are required, order with the part numbers listed below. Option Part no. Note Weight Lead wire and M12 connector LFE-1-A3 Lead wire length 3 m Approx. 175 g Option Part no. Note Weight LFE-1-D Tapping screw for LFE1 (3 x 10), 4 pcs. Approx. 45 g Bracket LFE-2-D Tapping screw for LFE2 (3 x 10), 4 pcs. Approx. 70 g LFE-3-D Tapping screw for LFE3 (3 x 10), 4 pcs. Approx. 70 g 5 3-Color Display Electromagnetic Digital Flow Switch LFE Series For flow switch precautions, refer to the Operation Manual on the SMC website. Specifications