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Gaseous detection system

  • US 4,905,498 A
  • Filed: 07/19/1988
  • Issued: 03/06/1990
  • Est. Priority Date: 09/11/1986
  • Status: Expired due to Fees
First Claim
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1. A gas detection system for detecting the presence of and determining the level of a preselected gas, the system comprising:

  • (a) sensing means for sensing the preselected gas, said sensing means including isolation means having an input for receiving a mixture of gases at a substantially constant pressure, and an output for providing a sequential flow of substantially segregated gases, such that the preselected gas as contained within said mixture of gases will be provided in substantially isolated form at said output during a preselected window of time following introduction of said mixture of gases to said input;

    (b) means for providing a signal when said preselected gas is sensed;

    wherein said sensing means further includes;

    a first exhaust outlet;

    a second exhaust outlet; and

    first valve means operably connected to said isolation means and said first and second exhaust outlets for selectively connecting said output of said isolation means to said first and second exhaust outlets.

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