CPC Main Group Additional Only
F23N 2229/00 Flame sensors
11 direct subcodes
Child Classifications
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- F23N 2229/02 Pilot flame sensors
- F23N 2229/04 sensitive to the colour of flames
- F23N 2229/06 with periodical shutters; Modulation signals
- F23N 2229/08 detecting flame flicker
- F23N 2229/10 comprising application of periodical fuel flow fluctuations
- F23N 2229/12 with flame rectification current detecting means
- F23N 2229/14 using two or more different types of flame sensor
- F23N 2229/16 using two or more of the same types of flame sensor
- F23N 2229/18 Flame sensor cooling means
- F23N 2229/20 Camera viewing
- F23N 2229/22 the sensor's sensitivity being variable