CATALYTIC GAS DETECTOR

摘要

1536305 Catalytic gas detector ROSEMOUNT ENG CO Ltd 23 Aug 1977 [31 Aug 1976] 36068/76 Heading G1N A catalytic gas detector comprises two sensors having thermistor elements 7 (only one shown) on respective electrically insulating substrates 5 sandwiching between them a thermally insulating member 2 such that the surface area of the resulting sandwich is less than the combined surface area of the two sensors and one of the sensors having a catalytic coating 10 on an exposed surface portion thereof. The thermistors may be connected in a bridge configuration. The arrangement is said to reduce the heat loss from the detector and therefore the power required to heat it.