Process Pressure Gauge in USA Product Description: The Process Gauges feature a 4-1/2" (115mm) heavy duty phenolic case with SS316 wetted parts. The process pressure gauges are ideal for use in Process Plants like Oil & Gas, Chemical, Power or any harsh environments. Accuracy Available is +/- 0.5% and 1% Applications: Pharmaceutical, Chemical, Petrochemical, Oil & Gas, Refinery, Paper & Pulp, Sugar, Breweries, Food & Beverages, Cement Industries, etc. Features: 4-1/2" dial size Polypropylene Case and Ring Solid Front Design with Full Blow Out Back SS316 Bourdon and Socket, SS30 Movement Dry or Liquid Filled (Glycerin or Silicon) ¼”, ½” npt connection Bottom Direct Mount with 3 hole for fixing Accuracy ±1% F.S.D. , (or ±0.5% F.S.D. )