| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a samll-sized constant potential electrolytic type gas sensor which develops an expected pressure adjusting function certainly, sets a plurality of gas detecting electrodes to a mutually sufficient liquidtight state, prevents the leakage of an electrolyte certainly to perform the highly reliable detection of gas. <P>SOLUTION: This constant potential electrolytic type gas sensor is equipped with a casing constituted so that an undersurface side casing member having a gas permeating port is provided on one end side of a cylindrical casing main body while an upper surface side casing member is provided on the other end side of the main body and the gas permeating port is sealed by a gas permeable hydrophobic diaphragm to form an electrolyte chamber. An acting electrode is arranged in the casing in opposed relation to the diaphragm and a counter electrode is arranged in the casing so as to be made liquidtight with respect to the acting electrode. Further, a communication hole letting the electrolyte chamber communicate with the open air is formed to the outer peripheral surface of the upper surface side casing member through the recessed place formed to the inner surface of the casing member and a gas permeable hydrophobic pressure adjusting membrane is arranged on the inner surface of the casing member so as to close the recessed place. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
