ProductDescription: Water Flowsensorincludesaplastic/brass bodyhousing,awaterrotor,andahall-effectsensor,PCBelectronicsboard. Workingperformance:Whenthewaterflowsthroughtherotor,thenrotorisrolled. Itsspeedchangeswithdifferentrateofflow.ThenthemagneticrotormakereactiontoHallsensor,thehall-effectsensoroutputsthecorrespondingpulsesignal. Theflowsensorissuitabletodetecttheflowinwaterdispenserorcoffeemachine..... brand new and high quality Specification: Material: Brass Type: Hall Flow Rate Meter Mounting Position: Horizontal & Vertical Application: Water heater, broiler and heat pump ...etc. Rated Voltage: for DC 5V Pressure Resistance: 1.75MPa Working Voltage Range: for DC 5-15V Insulation Resistance: >100M Flow Pulse: (11*Q) Q=L/Min3% Output Pulse Duty Ratio: 50%10% Accuracy: (125L\MIN3% Size: G 1/2" Quantity: 1 Pc Flow Sensor Technical Data (1) Flow Rate: 1~25 L/min (2)Flow Pulse: F=11 *Q 5% , Q=L/min (3) Working Voltage: DC3V ~ 24V (4) Working Current: 15mA (5) Suffering Pressure: Max 1.5Mpa (6) Working Temperature: -40 C ~+80 C, (7)Min Insulation Resistance:100M Ohm (8)Output Pulse Duty Cycle: 50% +/- 10% (9) Max output Pulse Voltage: >DC4.7V ( input voltage DC5V) (10)Min Output Pulse Voltage :