DIN EN 45544-1-2000 工作场所空气.有毒气体和蒸气的直接浓度测量和直接检测用的电气装置.第1部分:一般要求和试验方法
Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 1: General requirements and test methods; German version EN 45544-1:1999