Digital Pressure Gauge SUMMIT635 profile: Digital pressure gauge SUMMIT635 dual input dual channel differential pressure meter selectable mmHg \\ inHg \\ kPa \\ mBar \\ PSI \\ inH2O and mmH2O7 kinds of units. Dual-channel digital pressure gauge SUMMIT635 features: 1 Sandblast extruded aluminum housing 2Dual input measure pressure differential pressure 3Back to Zero button to altitude pressure correction 4.7 Selectable units: mmHg inHg kPa mBar PSI inH2O and mmH2O. 5. Easy to read LCD display (backlit). 6.10 Seconds off the backlight automatically after 7 Automatic shutdown after 30 minutes (REC mode excluded) 8 Can record the maximum and minimum readings 9Data Hold function SUMMIT635 pressure systems can be used to check the air pressure check the pressure of the gas supply system the room air to check the air pressure industrial HVAC systems inspection of industrial pressure force switching systems.