Line-type optical beam combustible gas detectors for industrial and commercial use (HS: 9027100090); - Gas or smoke analysis apparatus (HS 902710). Fire protection (ICS 13.220.20)
National Standard of the P.R.C., Combustible Gas Detectors－Part 4：Line-type Optical Beam Combustible Gas Detectors for Industrial and Commercial Use (19 page(s), in Chinese)
This standard specifies classifications, requirements, tests, inspection rules and markings of line-type optical beam combustible gas detectors. This standard applies to line-type optical beam combustible gas detectors used in industrial and commercial premises for detecting all types of flammable gases and vapours.