Explosive atmospheres, Part 29.4: Gas detectors - Performance requirements of open path detectors for flammable gases
爆炸性环境 第29.4部分:气体探测器——可燃气体开路探测器的性能要求
Adopts IEC 60079-29-4 to establish the specific requirements for design, construction and performance testing of electrical equipment for open path detection of flammable gases and vapours.