Lightning protection detection instrument: BH-9 combustible gas tester(hereinafter referred to as the detector) is an intelligent gas detector designed using large-scale integrated circuit technology, standard intelligent technology level design technology, and proprietary digital analog hybrid communication technology. The detector uses natural diffusion to detect gases, and the sensitive element adopts a gas sensor, which has * sensitivity and excellent repeatability. It is easy to use and maintain, greatly meeting the high reliability requirements of industrial site safety monitoring equipment. The shell is made of high-strength engineering plastic and composite anti slip rubber, with high strength, good hand feel, and waterproof, dustproof, and explosion-proof.