This standard specifies the technical requirements, test methods, inspection rules, signs, Encasement, transportation and storage of hydrogen sulfide detection and alarm instruments for coal mines. It refers to a series of normative documents such as GB/T 2423.1, GB 3836.1, etc., which define terms and definitions, including display value, zero point, calibration point, alarm point and intrinsic error, etc., to ensure that the instrument can accurately measure and issue an alarm in time under normal working conditions.