Diaphragm die electrochemistry type gas detector

摘要

PROBLEM TO BE SOLVED: To suppress the aging of detection sensitivity, viscosity, and the like by accommodating the mixture of each specific sulfuric acid and polyethylene glycol as an electrolyte in a cell with a window being sealed by a gas- permeability diaphragm. ;SOLUTION: In a cell container 1, a diaphragm 7 where a film 9 that becomes an operation electrode by reactive sputtering or the like is extended in a through hole 3, and a diaphragm 11 where a film 10 made of a substance suited for a counter electrode is formed is provided in a through hole 4. Polyethyleneglycol is mixed to the following sulfuric acid by 1.0-3.5 wt.% for preparation. In this case, by using polyethyleneglycol with at least 4,000,000 molecular weight that shows a viscosity being bonded to the films 9 and 10 and cannot flow down, an electrolyte 2 can have high detection sensitivity and small economical change. Also, by using a sulfuric acid that is at least 10 prescription, the decomposition of polyethyleneglycol due to sulfuric acid, namely the reduction in viscosity, can be prevented.;COPYRIGHT: (C)2000,JPO