Vacuum pump gauge analogue
ASHRAE recommends evacuation to below 1000 microns for moisture removal and below 500 microns after replacing a compressor. Some equipment manufacturers call for evacuation to 400 microns to ensure that harmful water vapor is removed from the system. Micron gauge
HVAC/Refrigeration: To pull a deep vacuum, removing moisture (which boils off below 500 microns) for proper system charging and function.
Automotive: Diagnosing engine performance by checking intake manifold vacuum; also used for A/C service.





Sean Dobson (verified owner) –
Exactly what I ordered arrived in line with the description and photos.
Sean Dobson –