Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by profession or discipline]
7. [tools and equipment for mining and excavating]

Anotations

Scope note:

Devices used for detecting the explosive gas methane in the context of mining operations. A firedamp detector is hung at the mining face or in other work areas to monitor methane levels and sound an alarm when they reach a dangerous concentration.