U.S. Code of Federal Regulations
Regulations most recently checked for updates: Jan 21, 2026
(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 of NFPA 59A (incorporated by reference, see § 127.003).
(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) of NFPA 70 (incorporated by reference, see § 127.003) and each area in which flammable or combustible material is stored; and
(2) Meet Section 16.4 of NFPA 59A (incorporated by reference, see § 127.003).
