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西安闫良兰华传感器厂生产的LH1101,1102和1301、1302型压力和盖压传感器系本质安全型传感器,于1992个12月16日与煤炭(?)学研究总院西安分院物探所研制生产的防爆式水压记录仪一起经国家防爆电气产品质量监督检验测试中心审查、检验,确认2产品均(?)合GB3836.4—83《爆炸性环境用防爆电气设备本质安全型电路和电气设备“1”》的有关规定,正式颁发防爆合格证,2者的防爆合格证(?)号分别为54042—92和54043—92,对应的防爆标志为ia ⅡCT5和ib Ⅰ.
The LH1101,1102 and 1301,1302 pressure and gland pressure sensors manufactured by Xi’an Yan Liang Lanhua Sensor Factory are intrinsically safe sensors. They were developed and produced by the Institute of Geophysics, Xi’an Branch, Coal Research Institute, Beijing on December 16th, 1992. The water pressure recorder has been reviewed and inspected by the National Quality Supervision, Inspection and Test Center for explosion-proof electrical products, confirming that both products meet the requirements of GB3836.4-83 “Intrinsically safe circuits and electrical equipment for explosion-proof electrical equipment for explosive atmospheres.” The relevant provisions of the “formally issued” explosion-proof certificate, two of the explosion-proof certification (?) No. respectively 54042-92 and 54043-92, the corresponding explosion-proof signs for ia IICT5 and ib I.