Wisscool Digital Micron Vacuum Gauge 1/4" SAE, Digital Pressure Tester Meter HVAC, Alarm Notice, Temp Compensation, LCD Display, 4 Units

Measurement Range - The measuring range of the vacuum gauge is 99999~0.1Pa(740000~0.75Micron). Accuracy is ±5%(at 20℃).. Professional high accuracy Pirani vacuum sensor, accurate and fast.. 4 Conversion Units: Pa, mBar, mmHg, Microns. Units can be converted as needed.. Buzzer Alarm: Alarm notice or vibration will be prompted when the vacuum value hits the evacuation target. The package comes with a green vacuum gauge, 3xAA batteries, one 1/4"" SAE extension connector fitting, one T-connector, a instruction manual and a portable tool bag. Usage Note: The vacuum gauge works with Stage two/5cfm vacuum pump machine or more. Please check instruction and operation videos before usage.