International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 61779-4:2000
Title 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
Project Number 13137
Abstract/Scope Specifies requirements for group II (as defined in part 1) portable, transportable and fixed apparatus for the detection and measurement of combustible gas or vapour concentrations with air. The apparatus, or parts thereof, may be installed or used in potentially explosive atmospheres, other than mines susceptible to firedamp (i.e. group I). This standard is restricted to apparatus intended for the detection and measurement of combustible gas or vapour concentrations with air up to 100% lower explosive limit (LEL).


Current Stage code 6060
Current Stage code date 2000-06-29
Current Stage code deadline 2001-01-01
Deadline date for vote  


Directive(s) ATEX (94/9/EC)
Order Voucher  


IEC Technical Body IEC/TC 31
Reference Document IEC 61779-4:1998 (MOD)
ICS 17.060 - Measurement of volume, mass, density, viscosity
29.260.20 - Electrical apparatus for explosive atmospheres
Keywords Flammable gas; Detection; Measurement; Lower explosive limit; Performance requirement
Note Supersedes EN 50057:1998 * Superseded by EN 60079-29-1:2007
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2000-06-29 2001-01-01 export to doc file  FR
export to doc file  EN
5099 2000-01-01 2000-05-01  
5062 1999-11-19 2000-01-01  
5020 1999-04-15 1999-10-15  
1090 1998-11-12 1999-05-12  

Implementation Dates

date of Ratification (DOR) (1) 2000-01-01
date of Availability (DAV) (2) 2000-06-29
date of Announcement (DOA) (3) 2000-07-01
date of Publication (DOP) (4) 2001-01-01
date of Withdrawal (DOW) (5) 2003-06-30


Supersedes EN 50057:1998
Superseded by EN 60079-29-1:2007
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.