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JB's DV-24N reads vacuum in seven international units: microns, lb/sq-inA, in Hg, mBars, Pascals, Torr, and mTorr. The DV-22 has a micron range of 20 - 9000 micron. 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 micron. 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, 20 to 9000 um Measuring, Flared Swivel Connection, LCD Display, 9 V, 32 to 120 deg F
| Measuring Range | : | 20 to 9000 um |
| Connection Type | : | Flared Swivel |
| Display Type | : | LCD |
| Temperature Rating | : | 32 to 120 deg F |
| Power Supply | : | 9 V |
- Saves last vacuum readout after shut-down
- Leak-proof with O-ring coupler to ensure proper register of vacuum
- Powers off after 10 min of no use to preserve battery life
- Digital display with solid state circuitry automatically adjusts for fluctuating temperature
- T2-4 flare tee used to attach hoses to gauge (sold separately)
- Protective carrying case
- Low battery indicator alerts to replacing 9 V battery (not included)
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