The Lumax LX-1371 Electronic Flow Meter is designed to be a simple, reliable, versatile digital meter that provides accurate readings while dispensing fluids. The easy-to-read large four digit 1" LCD display can be calibrated in gallons, quarts, pints and liters. The display can be rotated in four different positions. This meter is suitable for DEF/Urea/AdBlue, water petroleum-based chemicals and chlorinated solvents. The meter uses two AAA batteries for operation. The flow range for the LEX-1371 is 3-30 GPM with a max pressure of 300 psi.