Flame sensors and methods of sensing flame

摘要

PCT No. PCT/GB92/01497 Sec. 371 Date Feb. 14, 1994 Sec. 102(e) Date Feb. 14, 1994 PCT Filed Aug. 13, 1992 PCT Pub. No. WO93/04346 PCT Pub. Date Mar. 4, 1993.A flame sensor comprises a cell (10) containing an infra-red absorptive fluid such as carbon dioxide gas. Heating caused by absorption of the infra-red radiation is detected by measuring a resulting temperature or pressure change.