Explosive atmospheres - Part 29-0: Gas detection equipment - General requirements and test methods

IEC 60079-29-0:2025 specifies general requirements, test methods and acceptance criteria that apply to flammable, oxygen and toxic gas detection equipment intended to detect gases and vapours and to provide an indication, alarm or other output function for personnel or property protection in industrial and commercial applications.

This document applies to the following gas detection equipment:

– Gas detection equipment Type "FL" intended for the detection of flammable gases:

？ Type FL-Group I, in mines susceptible to firedamp;

？ Type FL-Group II, in locations other than mines susceptible to firedamp; and

？ Type FL-OP, open path gas detection equipment for flammable gases.

– Gas detection equipment Type "O2" intended for the detection of Oxygen:

？ Type O2-DE, detection of oxygen deficiency or oxygen enrichment; and

？ Type O2-IN, inertisation as measuring function for explosion protection.

– Gas detection equipment Type "TX" intended for the detection of toxic gases:

？ Type TX-SM, detection in areas for safety monitoring applications and typically using alarm signalling;

？ Type TX-HM, occupational exposure measurement in the region of occupational exposure limit values; an