SENSTREE G1/2 '' Flow Hall Sensor with NPT Thread, 1-30L/Min Flow Meter, Flowmeter Counter, Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible Small size, waterproof, easy to install, heat resistance, pressure resistance, cold resistance. Flow range:10-200L/min, working voltage range:DC 5-18 V, allow compression:Water pressure 1., 75 Mpa below. Work for Arduino, Raspberry Pi, and Reverse Osmosis Filter. G2 Inch Hall Effect Flow Meter 1/2" Water Flow Sensor Food-grade Switches Hall Effect Flowmeter Fluid Meter | UK Water Level Sensor Waterproof, heat resistance, pressure resistance, cold resistance. Easy to install. Flow range:10-200L/min. Sensor:Hall effect. Maximum current:15 mA(DC 5V Connect to G2 inch BSPT male thread, if used for NPT, need thread seal tape. Cable length:480mmMax Size:92mm*68mm Package include:Flowmeter x 1 3/4 Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 1 60l Min Wide application: It is mainly used in water heater, coffee machine, water purifier, drinking fountain, beverage machine, campus smart card equipment, etc.