Measures air pressure, water pressure, fuel pressure, gas pressure, oil pressure, anything not corrosive to brass Accuracy is 2-1-2% of span and works from 30 to 160 degrees F Liquid filled for added durability in applications where vibration is present Stainless steel case and bezel, copper alloy internals. ¼” Male NPT Bottom Connection 0 to 15 PSI Pressure Gauge, Single Scale, 2.5” Dial. Ideal for pumps and compressors