---
kind: "section"
citation: "33 C.F.R. § 127.201"
title: "33"
number: "127.201"
heading: "Sensing and alarm systems."
url: "https://uscodex.org/cfr/33/127.201"
---

# §127.201. Sensing and alarm systems.

- (a) Fixed sensors must have audio and visual alarms in the control room and audio alarms nearby.
- (b) **Fixed sensors that continuously monitor for LNG vapors must—**
  - (1) Be in each enclosed area where vapor or gas may accumulate; and
  - (2) Meet [Section 16.4](/cfr/33/16.4.md) of NFPA 59A (incorporated by reference, see [§ 127.003](/cfr/33/127.003.md)).
- (c) **Fixed sensors that continuously monitor for flame, heat, or products of combustion must—**
  - (1) Be in each enclosed or covered Class I, Division 1, hazardous location defined in [Section 500.5(B)(1)](/cfr/33/500.5.md?p=B-1) of NFPA 70 (incorporated by reference, see [§ 127.003](/cfr/33/127.003.md)) and each area in which flammable or combustible material is stored; and
  - (2) Meet [Section 16.4](/cfr/33/16.4.md) of NFPA 59A (incorporated by reference, see [§ 127.003](/cfr/33/127.003.md)).

## Notes

### Amendments

[CGD 78-038, 53 FR 3376, Feb. 7, 1988, as amended by USCG-2019-0444, 87 FR 5690, Feb. 2, 2022]

### Authority

Authority: 33 U.S.C. 1504(j)(2); 46 U.S.C. 70011 and 70034; 46 U.S.C. Chapter 701; DHS Delegation No. 00170.1, Revision No. 01.2, paragraph (II)(92)(a).

### Source

Source: CGD 78-038, 53 FR 3376, Feb. 7, 1988, unless otherwise noted.

### Amendments

[CGD 78-038, 53 FR 3376, Feb. 7, 1988, as amended by USCG-2019-0444, 87 FR 5690, Feb. 2, 2022]