Gas detecting apparatus

摘要: 1,023,561. Measuring gas concentration electrically. ENGLISH ELECTRIC CO. Ltd. March 22, 1962 [March 29, 1961], No. 11485/61. Heading G1N. A transducer for measuring the of methane in a mixture comprises thermocouple 14 (Fig. 1) enclosed glass tube 15 covered with platinum wire heater 16, held position by an impervious layer refractory material 17. catalytic coating 18 to promote combustion is formed on 17 repeated application solution platinum, palladium and aluminium. The element mounted porous housing 25 2) base 21. diffuses into burns at rate dependent its concentration. may alternatively comprise end closures ground thickness producing required diffusion. catalyst be applied directly 16. In another embodiment 3), junction 104 alumina 105 filled cement 108 surrounded 109, secured 110 coated catalyst. used circuit Specification 1, 023, 231.