The gas sensor and escaping gas warning horn

摘要

PROBLEM TO BE SOLVED: To provide a gas sensor and a gas leak alarm for surely preventing the infiltration of miscellaneous gases from the exterior while simplifying gas leak inspection work.;SOLUTION: A sensor cap 9 has an opening hole 11 for inspection in a lower side face of a miscellaneous gas filter 10. An outer tube 13 for covering the sensor cap 9 via an 0-ring like seal 20 has vertical holes comprising an inspection gas inlet port 14 downward extending from an upper surface of an outer tube 13 and a closing plug movement guide hole 19 larger than an opening diameter of the inlet port 14, and has a ring-shaped recessed groove 15a at the same level position as the opening hole 11. In the guide hole 19, a closing plug 16 normally closes the inlet port 14 by biasing force of a compression spring 17. The opening hole 11 communicates with the exterior of the gas leak alarm when the closing plug 16 is depressed by an inspection gas supply means.;COPYRIGHT: (C)2005,JPO&NCIPI