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Micron gauges are used to determine proper levels of vacuum in air conditioning systems prior to charging with refrigerant. Proper degassing and dehydration are critical to proper performance and to assure a long equipment life. The Accutools BluVac and the Thermal analog gauges are two of the best rated and best performing vacuum gauges available for air conditioning and refrigeration vacuum measurement. Tried, Tested and True.
Originally posted by reverunbilly. i'm confused about how microns and inches in vac. are translated. a micron is 39000 of an inch. a so called perfect vacuum is 29hg. i dont understand what is meant by drawing a vac. to 500 microns. my yellow jacket gauges dont say a thing about microns.