BS EN 50057:1991
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 combustible gases. Performance requirements for Group II apparatus indicating up to 100 % lower explosive limit
Hardcopy , PDF
09-15-2000
English
12-20-1991
Performance requirements for portable, transportable and fixed apparatus for the detection and measurement of combustible gas or vapour concentrations with air.
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