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随着石油化学工业的发展,对测温仪表和防爆要求日益迫切。我厂于78年12月试制了工业用隔爆型热电阻和热电偶,适用于B1a～B3c级组区间内有爆炸危险的场所。隔爆热电阻的测温范围为-200～+500℃;隔爆热电偶的测温范围为0～+800℃;被测对象对保护管的作用应为中性。样机已于79年3月和6月先后在青岛四方机车厂、北京化工七厂、太原145、245厂及上海硬化油脂厂试用,情况良好。79年十月召开了设计定
With the development of the petrochemical industry, the requirements of temperature measuring instruments and explosion-proof are increasingly urgent. I plant in December 78 trial of industrial flameproof thermal resistance and thermocouple, suitable for B1a ~ B3c level group there is a risk of explosion place. Explosion-proof thermal resistance of the temperature range -200 ~ +500 ℃; Explosion-proof thermocouple temperature range of 0 ~ +800 ℃; the measured object of the protection of the tube should be neutral. The prototype was successfully tested in Qingdao Sifang Locomotive Works, No. 7 Chemical Factory of Beijing Chemical Plant, No. 145,245 Plant of Taiyuan and Shanghai Harden Oil Factory in March and June of 1979 respectively. Design was held in October 1979