Will handle thin & thick liquids. Automatic "On" with fluid flow. 0.5% Accuracy. Rated to 20 GPM and 100 PSI. 1" ports. Long life 3V Lithium battery. Displays gallons or liters. 4 digit LCD display with 0.8" letters. Glass-filled nylon body and nutating disk design. Simple calibration steps. Pump mounted version includes 1" FPT rear inlet & 1" MPT side outlet. Hose end version includes 1" FPT ports. Viton® seals. Temperature Range -10 Deg. F. to +30 Deg. F.