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



Reference EN 50271:2010
Title Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen - Requirements and tests for apparatus using software and/or digital technologies
Project Number 21933
Abstract/Scope This European Standard specifies minimum requirements and tests for electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen using software and/or digital technologies. Additional requirements are specified if compliance with safety integrity level 1 (SIL 1) according to EN 61508 series is required for low demand mode of operation. NOTE 1 It is recommended to apply this European Standard for apparatus used for safety applications with SIL-requirement 1 instead of EN 50402. However, the technical requirements of EN 50271 and EN 50402 are the same for SIL 1. NOTE 2 For fixed apparatus used for safety applications with SIL-requirements higher than 1 EN 50402 is applicable. This European Standard is applicable to fixed, transportable and portable apparatus intended for use in domestic premises as well as commercial and industrial applications. This European Standard does not apply to external sampling systems, or to apparatus of laboratory or scientific type, or to apparatus used only for process control purposes. This European Standard supplements the requirements of the European Standards for the detection and measurement of flammable gases and vapours (e.g. EN 60079 29 1, EN 50241 1, EN 50241 2, EN 50194 1, EN 50194 2), toxic gases (e.g. EN 45544 series, EN 50291 1, EN 50291 2) or oxygen (e.g. EN 50104). NOTE 3 These European Standards will be mentioned in this European Standard as "metrological standards". NOTE 4 The examples above show the state of the standardisation for gas detection apparatus at the time of publishing this European Standard. There may be other metrological standards for which this European Standard is also applicable. This European Standard is a product standard which is based on EN 61508 series. It covers part of the phase 9 "realisation" of the overall safety life cycle defined in EN 61508 1.


Current Stage code 6060
Current Stage code date 2010-06-04
Current Stage code deadline 2011-06-01
Deadline date for vote 2010-04-30


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


IEC Technical Body  
Reference Document  
ICS 13.320 - Alarm and warning systems
Keywords Gas;Detection;Toxic;Oxygen;Digital
Note Supersedes EN 50271:2001
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2010-06-04 2011-06-01 export to doc file  EN  FR  DE
5099 2010-06-01 2010-10-01  
5061 2010-04-27 2010-06-01  
5060 2009-12-22 2010-01-22 export to doc file  EN
5020 2009-10-16 2009-12-18 export to doc file  EN
4099 2009-04-21 2009-10-30  
4060 2009-03-03 2009-04-01 export to doc file  EN
4020 2008-09-26 2009-02-27 export to doc file  EN
3099 2008-09-01 2008-10-05  
1099 2008-09-01 2009-03-01  
1000 2008-02-27 2008-08-31  

Implementation Dates

date of Ratification (DOR) (1) 2010-06-01
date of Availability (DAV) (2) 2010-06-04
date of Announcement (DOA) (3) 2010-12-01
date of Publication (DOP) (4) 2011-06-01
date of Withdrawal (DOW) (5) 2013-06-01


Supersedes EN 50271:2001
Superseded by  
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.