ASME B40.1 Grade A Accuracy Compliance ± 2-1-2 % of span Oil, Water, Air, Compressor, Hydraulics, HVAC, Gaseous & Liquid media that are not highly viscous or crystallizing and not corrosive or oxidizing to copper alloy parts Dual Scale: psi / bar with kPa guidance. Burdon tube type, Brass and Copper Alloy Wetted Parts, Polycarbonate Window Lens Stainless Steel Case CARBO Instruments 2- 1/2" Pressure Gauge, Stainless Steel Case, Liquid Filled, 0-600 psi/kPa, Back Mount 1/4" NPT Reliable and dampen Pulsation & Vibration Oil, Water, Air, Compressor, Hydraulics, HVAC, Gaseous & Liquid media that are not highly viscous or crystallizing and not corrosive or oxidizing to copper alloy parts