(IEC 60079-29-4:2009, modified + Cor.:2010); German version EN 60079-29-4:2010
Class/Status:
Standard,
valid
Released: 2011-02
VDE Art. No.: 0400049
This standard specifies performance requirements of equipment for the detection and measuring of flammable gases or vapours in ambient air by measuring the spectral absorption by the gases or vapours over extended optical paths, ranging typically from one metre to a few kilometres. Such equipment measures the integral concentration of the absorbing gas over the optical path in units such as LFL metre for flammable gases.
Replacement for:
DIN EN 50241-1/A1 VDE 0400-40-1/A1:2004-06
DIN EN 50241-1 VDE 0400-40-1:2000-04
DIN EN 50241-2 VDE 0400-40-2:2000-04
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