Siemens Combustion QRA4M.U High Sensitivity Uv Detector

The Siemens Combustion QRA4M.U is a high-sensitivity ultraviolet (UV) flame scanner intended for use with a variety of industrial and commercial gas burner applications. It serves as a watchful eye, always observing the burner flame's stability and presence to ensure safe and effective operation. The scanner detects the distinct light emissions from a burning flame by using ultraviolet (UV) technology. The scanner continuously sends an electrical signal to the burner control system in the event that a stable flame is detected. The control system can continue to feed gas and operate the burner because this continuous signal tells it that the flame is burning safely. The UV sensor stops detecting the distinctive UV light if the flame goes out suddenly.