JB's DV-22 reads vacuum in seven international units: microns, PSIA, InHg, mBars, Pascals, Torr, and mTorr. The DV-22 has a micron range of 20 to 9,000 microns. It is a good idea to attach the micron gauge to the vacuum pump before evacuation to make sure the pump pulls down to at least 50 microns. If it doesn't, your pump oil is contaminated and should be changed. A compound gauge only indicates that a vacuum is being produced, but does not tell you if moisture and acids are still present in the system. Micron gauges are the only tool to accurately read the low pressure produced when evacuation/dehydration is complete.
JB Industries Vacuum Gauge, Digital Hand Held, 20 to 9000 microns, 1/4 in Female Connection, LCD Display, 32 to 120 deg F, 9 V Battery
- Type Digital Hand Held
- Measuring Range 20 to 9000 microns
- Connection Type 1/4 in Female
- Power Source 9 V Battery
- Display LCD
- Warranty 12 Months
- Temperature Rating 32 to 120 deg F
Catalog-1- Low battery indicator alerts to replacing 9 V battery (not included)
- Saves last vacuum readout after shut-down
- Leak-proof with o-ring coupler to ensure proper register of vacuum
- Powers off after 10 minutes of no use to preserve battery life
- NIST traceable
- Female connection on this unit allows for direct connection to the A/C unit without need of hose connection
- Digital display with solid state circuitry automatically adjusts for fluctuating temperature
- T2-4 flare tee used to attach hoses to gauge (sold separately)
