K4551 Digital Test Pressure Gauge Accuracy +/-0.10 Percent Gauge Case Material 300 Stainless Steel Nominal Dial Size 3 in Lens Material Polyester IP/NEMA Rating IP65 Hazardous Location Rating Not Rated Sensor Material 316 Stainless Steel Socket Material 316 Stainless Steel Sensor Type Silicone MEMS Process Connection Type NPT Display Units bar cm Hg ft wc in Hg kg/sq cm kPa mm Hg Mpa psi Process Connection Gender Male Battery Type (3) AAA Batteries