Claims
- 1. A gas component detector comprising:
- a detector element of a metal oxide, said metal oxide exhibiting an electrical resistance value change depending upon a gas component in detected gases,
- a pair of electrodes connected to said detector element for picking up an electrical signal indicative of said electrical resistance value change,
- a holding body of an electrically insulating and heat-resistant metal oxide having a pair of through holes for supporting said pair of electrodes inserted therein,
- a cup-shaped catalyst carrier body of a heat-resistant metal oxide having a well, said catalyst carrier body being fixed to one end of said holding body to enclose said detector element within said well, said catalyst carrier body being so porous as to allow the exhaust gases to be detected to pass therethrough,
- a catalyst material carried by said catalyst carrier body for effecting oxidating reaction of said gas component in the detected gases,
- said cup-shaped catalyst carrier body having an internal surface of the well being spaced from the metal oxide of said detector element by an air gap with the catalyst thereon, which catalyst is not contacting the metal oxide,
- a cover of heat resistant metal enclosing said cup shaped catalyst carrier body, said cover having opening means provided therethrough for exposing the cup shaped catalyst carrier body to the exhaust gas.
- 2. A gas component detector according to claim 1, wherein said catalyst carrier body is fixed to said holding body by an inorganic bonding adhesive.
- 3. A gas component detector according to claim 1 wherein said holding body is provided with a half-spherical concave portion at one end thereof, and said detector element is formed in a disc shape so that said detector element is held in said half-spherical concave portion.
- 4. The gas component detector of claim 1, further comprising:
- at the one end of said holding body a stepped reduced neck portion to affix said cup-shaped carrier body and said
- heat-resistant metal cover.
Priority Claims (1)
Number |
Date |
Country |
Kind |
53/38196 |
Mar 1978 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 20,927 filed Mar. 15, 1979 (now abandoned).
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2724152 |
Aug 1977 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
20927 |
Mar 1979 |
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