noun
flame detector; flame sensor
Technical term for a device that detects flames, used in fire safety and industrial equipment.
この工場には火炎検出器が設置されている。
Flame detectors are installed in this factory.
火炎検出器が作動して警報が鳴った。
The flame detector activated and the alarm sounded.
Compound of 火炎 (flame) + 検出器 (detector). A straightforward technical term.