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

CLC/SC 31-9

Electrical apparatus for the detection and measurement of combustible gases to be used in industrial and commercial potentially explosive atmospheres



Reference EN 50241-2:1999
Title Specification for open path apparatus for the detection of combustible or toxic gases and vapours - Part 2: Performance requirements for apparatus for the detection of combustible gases
Project Number 5385
Abstract/Scope This European Standard specifies performance requirements for Group II portable, transportable and fixed apparatus for the detection and measurement of integral concentrations of combustible gas or vapour in air over a defined open path. The apparatus, or parts thereof, may be installed or transported for use in potentially explosive atmospheres. The general requirements and test methods applicable to the apparatus covered by this European Standard are specified in Part 1. This European Standard concerns apparatus intended to provide measurement or warning of specific combustible gases in air which constitute a potential hazard by virtue of their flammability. Open path detection apparatus as covered by this European Standard measures the path integral concentration. It is not capable of resolving the spatial variation of concentration along the optical path


Current Stage code 6060
Current Stage code date 1999-04-26
Current Stage code deadline 1999-10-01
Deadline date for vote  


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


IEC Technical Body IEC/TC 31
Reference Document  
ICS 13.320 - Alarm and warning systems
19.080 - Electrical and electronic testing
Keywords Combustible gas; Toxic gas and vapour; Open path apparatus; Detection; Performance requirement
Note Superseded by EN 60079-29-4:2010
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 1999-04-26 1999-10-01 export to doc file  FR
export to doc file  EN
6020 1998-11-01 1999-02-01  
5099 1998-10-01 1998-11-01  
5062 1998-09-08 1998-10-01  
5020 1998-04-22 1998-09-01  
4099 1997-01-16 1997-12-31  
4020 1996-04-11 1996-10-15  
3099 1996-02-22 1996-07-22  
3020 1996-02-22 1996-08-22  
3093 1995-12-14 1996-06-14  
3020 1995-08-31 1996-02-29  
3093 1995-06-01 1995-12-01  
3020 1994-12-31 1995-06-30  
2020 1993-11-25 1994-05-25  

Implementation Dates

date of Ratification (DOR) (1) 1998-10-01
date of Availability (DAV) (2) 1999-04-26
date of Announcement (DOA) (3) 1999-04-01
date of Publication (DOP) (4) 1999-10-01
date of Withdrawal (DOW) (5) 1999-10-01


Superseded by EN 60079-29-4:2010
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.