GOST R 52139-2003 Electrical apparatus for the detection and measurement of flammable gases. Part 4. Performance requirements for group I1 apparatus indicating a volume fraction up to 100 % lower explosive limit
GOST R 52136-2003 Electrical apparatus for the detection and measurement of flammable gases. Part 1. General requirements and test methods
GOST R 52139-2003 history
2010GOST R 52350.29.1-2010 Explosive atmospheres. Part 29-1. Gas detectors. General technical requirements and test methods for the detectors for flammable gases
2003GOST R 52139-2003 Electrical apparatus for the detection and measurement of flammable gases. Part 4. Performance requirements for group I1 apparatus indicating a volume fraction up to 100 % lower explosive limit
GOST R 52139-2003 Electrical apparatus for the detection and measurement of flammable gases. Part 4. Performance requirements for group I1 apparatus indicating a volume fraction up to 100 % lower explosive limit was changed to GOST R 52350.29.1-2010 Explosive atmospheres. Part 29-1. Gas detectors. General technical requirements and test methods for the detectors for flammable gases.