DIN EN 60079-29-4-2011 易爆气体环境.第29-4部分:瓦斯探测器.易燃性气体用开路式探测器的性能要求(IEC 60079-29-4-2009,修改件+Cor.-2010).德文版本EN 60079-29-4-2010
Explosive atmospheres - Part 29-4: Gas detectors - Performance requirements of open path detectors for flammable gases (IEC 60079-29-4:2009, modified + Cor. :2010); German version EN 60079-29-4:2010