GROZ 45651 Heavy Duty Digital turbine fuel meter, 1 inch NPT. Digital turbine meter for low viscosity fluids, easy to install in line or for end of the line applications, polypropylene turbine measuring mechanism electronic display using two AAA 1.5V batteries, polyamide body and sealed electronic card make it suitable for use in severe weather conditions display can be rotated in 4 different positions, measures in liters, quarts, pints & gallons, easy user re-calibration, includes one additional stainless steel adaptor to convert from 1” male to 1” female threads recommended use diesel, gasoline, bio diesel, windshield fluid, water; do not use with oils