Elitech SMG-1L Refrigeration Pressure Gauge -14.5~500 PSI

Six units switchable: MPa, kPa, bar, psi, kg/cm², cmHg Pressure measuring range: -0.100 ~ 3.448MPa (-14.5-500 psi) Resolution: 0.5psi Accuracy: +0.5%FS Sampling Rate: 1s Temperature Unit: °C/°F Battery: 3 AAA batteries Battery Life: 6 months Service 1-year warranty. 30 days free & easy return User Manual