This part of IEC 60079-29 specifies general requirements for construction, testing and
performance, and describes the test methods that apply to portable, transportable and fixed
apparatus for the detection and measurement of flammable gas or vapour concentrations with
air. The apparatus, or parts thereof, are intended for use in potentially explosive atmospheres
(see 3.1.8) and in mines susceptible to firedamp.
This standard is also applicable when an apparatus manufacturer makes any claims regarding
any special features of construction or superior performance that exceed these minimum
requirements. In these cases, all such claims should be verified and the test procedures
should be extended or supplemented, where necessary, to verify the performance claimed by
the manufacturer. When verifying the superior performance of one criterion, other
performance criteria are not required to meet the standards minimum requirements, however,
these reduced claimed performance criteria (as confirmed in the manufactures Installation
Manual) should also be verified. (e.g. temperature range of 0 °C to 60 °C; 0 °C to 40 °C at
±10 % accuracy and 40 °C to 60 °C at ±15 % (manufacturers claimed accuracy). The
additional tests should be agreed between the manufacturer and test laboratory and identified
and described in the test report.
This standard is applicable to flammable gas detection apparatus intended to provide an
indication, alarm or other output function; the purpose of which is to give a warning of a
potential explosion hazard and in some cases, to initiate automatic or manual protective
action(s).
This standard is applicable to apparatus, including the integral sampling systems of aspirated
apparatus, intended to be used for commercial, industrial and non-residential safety
applications.
This 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. It also does not apply
to open path (line of sight) area monitors. For apparatus used for sensing the presence of
multiple gases, this standard applies only to the detection of flammable gas or vapour.
This standard supplements and modifies the general requirements of IEC 60079-0. Where a
requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of
IEC 60079-29-1 will take precedence.
IEC 60079-29-1:2007 Referenced Document
IEC 60079-0 Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements*, 2019-06-27 Update
IEC 60079-29-2 Explosive atmospheres – Part 29-2: Gas detectors – Selection, installation, use and maintenance of detectors for flammable gases and oxygen*, 2015-03-16 Update
IEC 61000-4-1 Electromagnetic compatibility (EMC) - Part 4-1: Testing and measurement techniques - Overview of IEC 61000-4 series
IEC 61000-4-3 Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test*, 2020-09-08 Update
IEC 61000-4-4 Electromagnetic compatibility (EMC) — Part 4-4: Testing and measurement techniques — Electrical fast transient/burst immunity test*, 2012-04-30 Update
IEC 60079-29-1:2007 history
2020IEC 60079-29-1:2016/AMD1:2020 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases
2020IEC 60079-29-1:2020 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases
2019IEC 60079-29-1:2016/ISH2:2019 Interpretation Sheet 2 - Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases
2019IEC 60079-29-1:2016/ISH1:2019 Interpretation Sheet 1 - Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases
2016IEC 60079-29-1:2016 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases
2009IEC 60079-29-1:2007/ISH1:2009 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases; Interpretation sheet 1
2007IEC 60079-29-1:2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases
IEC 60079-29-1:2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases has been changed from IEC 61779-1:1998 Electrical apparatus for the detection and measurement of flammable gases - Part 1: General requirements and test methods.
IEC 60079-29-1:2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases has been changed from IEC 61779-2:1998 Electrical apparatus for the detection and measurement of flammable gases - Part 2: Performance requirements for group I apparatus indicating a volume fraction up to 5 % methane in air.
IEC 60079-29-1:2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases has been changed from IEC 61779-3:1998 Electrical apparatus for the detection and measurement of flammable gases - Part 3: Performance requirements for group I apparatus indicating a volume fraction up to 100 % methane in air.
IEC 60079-29-1:2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases has been changed from IEC 61779-4:1998 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.
IEC 60079-29-1:2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases has been changed from IEC 61779-5:1998 Electrical apparatus for the detection and measurement of flammable gases - Part 5: Performance requirements for group II apparatus indicating a volume fraction up to 100 % gas.