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Process environment monitoring system

  • US 5,452,234 A
  • Filed: 12/13/1993
  • Issued: 09/19/1995
  • Est. Priority Date: 03/03/1989
  • Status: Expired due to Term
First Claim
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1. A process environment monitoring system comprising:

  • a test cell and an analyzer for identifying gas drawn into the test cell from a process environment;

    a plurality of gas conduits of different lengths for drawing gas from the process environments; and

    a flow controller for controlling the introduction of gas through respective conduits to the test cell, the flow controller causing gas to be drawn through the conduits at different times and for different durations of time;

    wherein the flow controller controls a pressure at which samples of gas are analyzed in the analyzer dependent on the process environment from which the gas is drawn and the sample is pressurized in the test cell at a level set to correspond to a sensitivity required by the analyzer.

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