K4239 Digital Industrial Pressure Gauge Accuracy +/-1.00 Percent Gauge Case Material ABS Nominal Dial Size 2 1/2 in IP/NEMA Rating NEMA 4X Hazardous Location Rating Not Rated Sensor Material Silicone Crystal Semiconductor Socket Material 304L Stainless Steel Sensor Type Diaphragm Process Connection Type NPT Display Units Bar Mpa psi Process Connection Gender Male Battery Type 9V Battery Process Connection Location Bottom Process Connection Size 1/4 in Power Source Battery