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Product View1.Description: It is a flow meter for measuring water flow. 2.Feature: 1>.High precision 2>.High pressure resistance 3>.Standard size 3.Parameter: 1>.Model: FS300A 2>.Specification: G3/4 3>.Work Voltage:DC 4.5V~24V 4>.Work current:20mA 5>.Flow pulse characteristic:F=5.5*Q-3;Q=L/min 6>.Precision:3% 7>.Output current:<10mA 8>.Flow range:1-60L/min 9>.Water pressure environment:<1.2MPa 10>.Work Temperature:0℃~80℃ 11>.Work Humidity:5%~90%RH 12>.Size:66*42*38mm 13>.Wire length:150mm 4.Function: 1>.Calculate the flow through the sensor liquid by receive output frequency from sensor. 5.Pin definition: 1>.Red wire:VCC.It is used to connect to positive of input work voltage. 2>.Yellow wire: Signal output. 3>.Black wire:GND.It is used to connect to negative of input work voltage. 6.Package: 1>.1pcs FS300A G3/4" Water Flow Sensor