1 micron resolution below 200 micron of vacuum Sensor Type Thermistor Connector Type Standard 1/4 inch male flare fitting Vacuum Range 0 - 12,000 Microns (0 - 1,600 Pascals) with vacuum increasing/decreasing indicator when above 12,000 Microns Scale Microns, PSI, InHg, milliBars, Pascals, Torr, milliTorr Operating Temp. Range 35°F to 125°F ( 2°C to 52°C) Overpressure 300 PSI max (20 Bar) Accuracy +/-10% (0 to 1000 microns) Power Source 9 Volt Alkaline battery (not included) Continuous Usage Over