Daqing Rongyu Petroleum Technology Co., LTD., established on April 20, 2012, mainly engaged in oil drilling equipment, chemical equipment, underground special tools, lighting equipment, construction equipment. In the process of oil exploitation, it will produce toxic gases to the human body, such as carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide and other gases. The project uses the ASD5300C, ASD5300 gas detector and JB-TB-ASD5120 alarm controller.