| 摘要 |
A sensing element ( 102 ) includes a porous material ( 121 ) which is porous glass having a plurality of fine pores ( 122 ) having an average pore size of 4 mum, a sensing agent ( 123 ) formed in the pores ( 122 ), and a selective permeable film ( 124 ) which is formed to cover the surface of the porous material ( 121 ) and made of a plastic film. The selective permeable film ( 124 ) is made of an organic polymer such as polyacrylonitrile or PMMA which uses, as a monomer, a compound made of a chainlike molecule containing a vinyl group, and has a film thickness of about 0.05 to 1 mum.
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