NEN EN IEC 61779-4 : 2000
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF FLAMMABLE GASES - PART 4: PERFORMANCE REQUIREMENTS FOR GROUP 2 APPARATUS INDICATING A VOLUME FRACTION UP TO 100% LOWER EXPLOSIVE LIMIT
12-12-2007
01-12-2013
Specifies requirements for group II portable, transportable and fixed apparatus for the detection and measurement of combustible gas or vapour concentrations with air.
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