K4590 Differential Pressure Gauge Scale Type IN H2O Pressure Range Minor Div. 1 in Rated Total Pressure 3000 PSI Relay Type SPDT Full Scale Accuracy ( Percent) 3/2/3 Percent Connection Size NPT (in) 1/4 FNPT Amps AC 0.25 Dial Size (in) 2-1/2 Ambient Operating Range (F) -40 to 200 Degrees F Includes Installation and Operation Manual Manufacturers Warranty Length 5 Year