GPI 113255-4, 01N31GM Nylon Turbine Water Flowmeter with Digital LCD Display, 3-30 GPM, 1-Inch FNPT Inlet/Outlet Auto-off display turns off after 1 minute of inactivity to extend battery life. Flow range of 3 to 30 GPM (10 to 100 LPM). Typical accuracy is 2.5 percent (accuracy can vary to 5 percent). Can be mounted on hose end for easy meter reading. Powered by two field replaceable AAA batteries (installed). Features one cumulative and one resettable batch total. For use with water. Wetted materials: nylon housing, nylon rotor, ceramic bearings, tungsten carbide shaft, 316 stainless steel rings and ferrite signal generators.