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Measuring-probe arrangement in a gas conduit

  • US 5,711,863 A
  • Filed: 09/29/1995
  • Issued: 01/27/1998
  • Est. Priority Date: 06/01/1993
  • Status: Expired due to Fees
First Claim
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1. A measuring arrangement for detecting gases flowing in a gas conduit, comprising:

  • a gas conduit for gases flowing in a given direction, and having an opening in its wall;

    a measuring-probe having a housing with a collar, a measuring element having a first portion disposed within said housing and a second portion projecting from said housing into the opening of the gas conduit, a protective tube surrounding said second portion of said measuring element and separated from said second portion by a clearance, said protective tube having at least one gas opening, each of said gas openings positioned to face away from the direction of flow of gases in the gas conduit, and a marking on said housing outside the gas conduit indicating a position of the gas opening in said protective tube; and

    a fastening means separate from said measuring-probe for securing the measuring-probe to the gas conduit such that the measuring-probe can move radially, said fastening means comprising a flange on the gas conduit at the opening therein having a thread into which a union nut is screwed to engage the collar on said housing and a sealing surface surrounding the opening in the gas conduit on which the collar of said housing rests such that the sealing surface forms a gastight seal at the point of contact with the collar.

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