scope:

This document specifies general requirements for the construction, testing and performance of electrically operated apparatus for the detection of flammable gases, designed for continuous operation in a fixed installation in domestic, in household and more generally in non-industrial premises. The apparatus can be mains or battery powered.

NOTE 1 Household premises are all the premises not classified as hazardous area or potentially explosive atmospheres according to the definition in EN 60079-0 and considered as performance under EN 60079-29-1.

Gas detectors or gas detection system, which may be installed where there may be a source of danger to the public, such as premises intended to be used in shops, in light industry and on farms, are within the scope of this document.

Additional requirements for apparatus to be used in recreational vehicles and similar premises are specified in EN 50194-2.

NOTE 2 For caravan holiday homes EN 50194-1 applies.

This document specifies three types of apparatus to operate in the event of an escape of town gas, natural gas or liquefied petroleum gas (LPG), Hydrogen and flammable refrigerant gases:

- Type A apparatus - to provide a visual and audible alarm and an executive action in the form of an output signal that can actuate directly or indirectly a shut-off device and/or other ancillary device in the event of an escape of town gas, natural gas (LNG) liquefied petroleum gas (LPG) and Hydrogen gases;

- Type B apparatus - to provide a visual and audible alarm only;

- Type C apparatus - to provide a visual and audible alarm and an executive action in the form of an output signal that can actuate directly or indirectly a shut-off device and/or other ancillary device in the event of an escape of flammable refrigerant gas A2L-A2-A3 as classified in ISO 817.

Apparatus complying with this document is not considered suitable for installation in potentially explosive atmospheres, where the EN 60079 series applies.

NOTE 3 Apparatus tested in accordance with EN 60079-29-1 will not necessarily comply with this document.

This document does not apply to any of the following:

- apparatus intended for the detection of dusts or mists in air;

- scientific or laboratory-based apparatus used only for analysis or measurement;

- apparatus used exclusively for process measurement purposes;

- apparatus for medical purposes;

- apparatus used for breath alcohol measurement;

- apparatus intended for the direct measurement of automotive exhaust gases;

- apparatus intended for use in industrial environments.