---
kind: "section"
citation: "30 C.F.R. § 27.22"
title: "30"
number: "27.22"
heading: "Methane detector component."
url: "https://uscodex.org/cfr/30/27.22"
---

# §27.22. Methane detector component.

- (a) A methane detector component shall be suitably constructed for incorporation in or with permissible and approved equipment that is operated in gassy mines and tunnels.
- (b) A methane detector shall include:
  - (1) **A method of continuous sampling of the atmosphere in which it functions.**
  - (2) A method for actuating a warning device which shall function automatically at a methane content of the mine atmosphere between 1.0 to 1.5 volume percent. The warning device shall also function automatically at all higher concentrations of methane in the mine atmosphere.
  - (3) A method for actuating a power-shutoff component, which shall function automatically when the methane content of the mine atmosphere is 2.0 volume percent and at all higher concentrations of methane.
  - (4) A suitable filter on the sampling intake to prevent dust and moisture from entering and interfering with normal operation.
- (c) A methane detector may provide means for sampling at more than one point; provided, the methane detector shall separately detect the methane in the atmosphere at each sampling point with, in MSHA's opinion, sufficient frequency.

## Notes

### Authority

Authority: 30 U.S.C. 957, 961.

### Source

Source: 31 FR 10607, Aug. 9, 1966, unless otherwise noted.