Patent ID: 6279376
Filing Date: 2001-08-28
Classification: G01N

Abstract:
A gas sensor for detecting characteristics of sample gas, said gas sensor comprising:a housing;a gas sensing element held by said housing and having a gas contact portion to contact the sample gas; andan element cover connected to said housing and covering said gas contact portion, said element cover having a double pipe structure formed by layering an inner pipe and an outer pipe, each of said inner pipe and said outer pipe being formed into a cylindrical shape with a bottom, wherein:said inner pipe has a side portion including a first side portion having a side hole through which the sample gas flows and a second side portion which prevents the sample gas from flowing therethrough, and a bottom portion having a bottom hole through which the sample gas flows;said outer pipe has a side portion having a side hole through which the sample gas flows, and a bottom portion having a bottom hole through which the sample gas flows;said second side portion of said inner pipe is exposed through said side hole of said outer pipe; anda spacing of 0.2-1.0 mm is formed between said bottom portion of said inner pipe and said bottom portion of said outer pipe.