This product is researched and manufactured in accordance with national standard GB/T8929-88. The temperature control part is composed of an explosion-proof microcomputer
controller and a flame-proof electric cabinet. The whole instrument is explosion-proof and has been certified by the China National Quality Supervision and Test Centre for Explosion Protected Electrical Products. No. of certificate: CNEx07.1756, CNEx071678. It is applicable in Zone 1 and Zone 2 of explosive atmosphere containing mixed gases of Type IIA, IIB and Group T1-T4. It is mainly used for testing the water content in crude oil. The glass instrument used has been certified by the National Institute of Metrology (NIM), with corresponding certificate enclosed in each unit.