NF EN 61779-4 : 2005
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
26-10-2012
12-01-2013
Gives the requirements for group II, portable, transportable and fixed apparatus for detecting and measuring combustible gas or vapour concentrations with air. The apparatus, or parts of apparatus, may be used or installed in potentially explosive atmospheres, except mines that are susceptible to firedamp. Applicable to apparatus meant for detecting and measuring combustible gas or vapour concentrations with air up to 100% lower explosive limit (LEL).
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