NF C23-557:1992
Electrical apparatus for the detection and measurement of combustible gases. Performance requirements for group II apparatus indicating up to 100 per cent lower explosive limit.

Standard No.

NF C23-557:1992

Release Date

1992

Published By

Association Francaise de Normalisation

Status

Be replaced 2005-01

Replace By

NF C23-560-4:2005

Latest

NF C23-579-29-1:2016

NF C23-557:1992 history

• 0000 NF C23-579-29-1:2016
• 2008 NF C23-579-29-1:2008 Explosive atmospheres - Part 29-1 : gas detectors - Performance requirements of detectors for flammable gases.
• 2005 NF C23-560-4:2005 Electrical apparatus for the detection and measurement of flammable gases - Part 4 : performance requirements for group II apparatus indicating a volume fraction up to 100 % lower explosive limit.
• 1992 NF C23-557:1992 Electrical apparatus for the detection and measurement of combustible gases. Performance requirements for group II apparatus indicating up to 100 per cent lower explosive limit.