Digital Vacuum Gauge 1/16inch 20UNF Interface Backlit Display Vacuum Micron Meter for Atmospheric Environment Item Type: Digital Vacuum Gauge Material: ABS Maximum Overload Pressure: 72Psi 0.5Mpa Measurement Range: 99999Pa~±0.1Pa, 740000~±0.75Micron Resolution: 0.1Pa (<10Pa); 1Pa (<100Pa); 10Pa (<1000Pa) Measurement Accuracy: 0.1Pa-10Pa, ±5% reading (at 20℃) Operating Temperature: -5-50℃ (-23-122℉) Battery: 3 x AA batteries (not included) Battery Life: Up to 40 hours Units: Pa, mBar, mmHg, mTorr, InHg, Microns Refresh Rate: 0.5 seconds Interface: 1/16in 20UNF (1/4in SAE) Sensor: 1 x Pirani Sensor Auto Shut Off Time: 10 minutes Backlit Time: 20 seconds Buzzer: 90dB volume, shuts off after 10 seconds Application: Atmospheric environment (cannot be used for measurement in other environments containing refrigerants, etc.)