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- Differential pump system for use with VQM The Differential Pump System by Granville-Phillips® extends the vacuum pressure range of the award-winning, high performance Vacuum Quality Monitor (VQM™).
- Vacuum Quality Monitor System (835 VQM™, Granville-Phillips®) The world’s fastest, lowest power, gas compositional analysis autoresonant ion trap mass spectrometer (IT-MS) instrument with full data collection, spectral deconvolution, and data logging software. Compact size. 1–145 amu at 85 ms capture rates or 1-300 amu at 120 msec. UHV to 10-5 Torr, or 3 Torr with differential pump. Usually coupled with a total pressure gauge to provide partial pressures of each gas.
- Vacuum Quality Monitor System