Digital Industrial Compound Gauge Accuracy +/-1.00 Percent Gauge Case Material ABS Nominal Dial Size 3 in IP/NEMA Rating Not Rated Hazardous Location Rating Not Rated Compatible Process Media Air and Compatible Gases Sensor Material Silicone Socket Material Stainless Steel Process Connection Type NPT Display Units in Hg psi Process Connection Gender Male Battery Type 9V Battery Process Connection Location Bottom Process Connection Size 1/4 in Power Source Battery