Description Water flow sensor is mainly composed of plastic valve body flow of rotor components and hall sensor It is installed in the water heater inlet used to detect water flow when the water through flow rotor components Magnetic rotor rotation and speed changes with the flow hall sensor output pulse accordingly Signal feedback to the controller by the controller to judge the size of the water flow adjust and control Features 1 This product appearance is light and agile small volume easy to install 2 Internal set with stainless steel shaft impeller wear forever 3 Sealing ring the force of the structure under never leak 4 Hall element USES the German import and encapsulated with potting glue prevent water never aging 5 All raw materials meet ROHS testing standards Specification YF S201 frequency F 7 5 Q L Min error 2 voltage 3 5 24 VDCCurrent should not exceed 10 ma 4380 pulse output flow through a litre The frequency calculation constant flow rate L min 7 5 unit time in seconds Working range 0 3 6 L min Use notice It is forbidden to severe impact and chemical erosion It is forbidden to throw or collision Vertical installation to no more than 5 degrees Medium temperature should not be more than 120 c Second the output waveform square wave Installation Method 1 Red IN connect the anode2 Yellow OUT signal output line3 Black GND connect the cathode Package included 1 x Water Flow SensorDetail Pictures