Bailey 820 Line of controllers, 66811250A1 Flamon Flicker Detector.
The Bailey 820 6681125D1 Flamon Flicker Detector is a vintage, legacy industrial control module manufactured by Bailey Controls (now part of ABB). It was designed for use within the Bailey 820 electronic analog control system to process signals from flame-sensing heads, ensuring safe burner and boiler operation.
Core Function & Technology
- Flame Discrimination: The module uses "flicker" technology to differentiate between the high-frequency dynamic flickering of an active burner flame and the steady background radiation from hot boiler walls (slag).
- Safety Interlocking: It monitors the presence or absence of a flame. If a flame failure occurs, it instantly relays a signal to the boiler trip system to shut off fuel and prevent explosions.