Portable methane detection and alarm devices (HS code(s): 902680); (ICS code(s): 13.320)

National Standard of the P.R.C.,Safety technical specifications for portable methane detection and alarm devices; (16 page(s), in Chinese)

This document specifies the safety technical requirements for portable methane detection and alarm instruments, including technical requirements, test methods and inspection rules. This document applies to portable methane detection and alarm instruments that measure methane concentration in air by means of carrier catalytic, non-dispersive infrared (NDIR) and semiconductor laser principles for use in environments with methane explosive gas mixtures.