WIKA 9310819 Industrial Pressure Gauge, Liquid-Filled, Copper Alloy Wetted Parts, 2-1/2" Dial, 0-5000 psi  Range, +/- 2/1/2% Accuracy, 1/4" Male NPT Connection, Bottom Mount Copper alloy wetted parts for high corrosion resistance against salty liquids Circular dial is three inches in diameter and enclosed in a forged brass case for increased durability in corrosive environments Pressure ranges from 15 psi to 15,000 psi Display accuracy is + or - 2/1/2 percent of span over the entire range of the gauge (ASME B40.100 Grade A) Lower back mount male connection with 1/4" NPT rate