About this itemThe water flow sensor is mainly composed of a stainless steel valve body, a water flow rotor assembly, a steady flow assembly and a Hall element. It is installed at the water inlet end of the water heater to detect the flow rate of the inlet water. When the water passes through the water flow rotor assembly, the magnetic rotor rotates, and the speed changes linearly with the flow rate. The Hall sensor outputs the corresponding signal and feeds it back to the controller. The controller judges the size of the water flow and regulates it.Technical SpecificationsInterface size: 1/2"(DN15), 3/4"(DN20), 1"(DN25), 1-1/4"(DN32), 1-1/2"(DN40), 2"(DN50)Working voltage range: DC3.5-24VMaterial: Stainless steelMedium temperature: 120Output high level: >DC 4.5V (input voltage DC 5V).Output low level: 100MFlow range: 1/2"(125 L/min 3%), 3/4"(130 L/min 3%), 1"(250 L/min 3%), 1-1/4"(360 L/min 3%), 1-1/2"(5150 L/min 3%), 2"(10200 L/min 3%), Flow characteristics: 1/2" F=(18*Q-3)3%; 3/4" F=(15*Q-3)3%;1" F=(8*Q-4)3%; 1-1/4" F=(1.8*Q)3%;1-1/2" F=(0.45*Q)3%; 2" F=(0.2*Q)3%; Q = L/MinTightness: Close each hole, add 1.7Mpa water pressure test for 1 minute without leakage and deformation.==========Actuator Mode : Without Manual And InstructionStructure : DaphragmPort Size : 1/2''DN15)Media : WaterMaterial : Stainless SteelTemperature of Media : Normal TemperatureStandard or Nonstandard : StandardPressure : Low PressurePower Source : ACIs Smart Device : noMaterial : Stainless steelOutput Signal : NPNWorking voltage range : DC3.524VMedium temperature : 120Water pressure resistance : 1.75MPaOutput high level : >DC 4.5 V(input voltage DC5V)Insulation resistance : >10