PRGIPiano Regolatore Generale Intercomunale (Italian: General Intercommunal Regulator Plan)
PRGIPercutaneous Retrogasserian Glycerol Injection (neurosurgery)
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For pressures higher than 10 torr, the gas flow rate into the sample inlet side of a single-stage PRGIS becomes extremely small, making the response time too slow for any practical measurements.
During process monitoring, the mass spectrometer typically runs at about [10.sup.-5] torr, which represents a three-decade pressure reduction across the Lo-C path of the PRGIS.
A PPR system fitted with a dual-path PRGIS can switch effortlessly from a highly sensitive RGA mode of operation to a process monitoring mode.