Gas sensors - for six fluorine conversion sulfur resolution gas detection

摘要

PURPOSE:To stably detect decomposition gas with good sensitivity, by using an acetylene polymer as a responsive film for detecting sulfur hexafluoride decomposition gas. CONSTITUTION:Both surfaces of a film 3 comprising an acetylene polymer (-CH=CH-)n are held between electrodes 2, 2' each formed in a comb-shape by the vapor deposition of silver to a support 1 as a responsive film to constitute a sensor for detecting sulfur hexafluoride decomposition gas. This sensor is provided in a sulfur hexafluoride gas insulating apparatus of a breaker or a switch. Sulfur hexafluoride is decomposed into sulfuryl fluoride or thionyl fluoride in the apparatus by arc discharge to dope the acetylene polymer film 3. Because of this, the conductivity of the film 3 changes and the specific resistance between both electrodes 2, 2' changes to detect decomposition gas. By using the acetylene polymer as the responsive film as mentioned above, even a minute amount of decomposition gas can be detected with good sensitivity.