A lead sulfide flame detector is used to detect which condition?

A lead sulfide flame detector is used to detect which condition?

• A. Oxygen content
• B. Water level
• C. Burner pilot and main flame
• D. Flame color

Answer: (C)

Lead sulfide flame detectors sense infrared radiation emitted by a hydrocarbon flame to confirm that combustion is actually taking place. This type of detector is used to verify that there is a flame at both the burner pilot and the main burner, and it will signal the control system to shut off fuel if the flame is lost. That safety function directly matches detecting the burner pilot and main flame. Oxygen content would require an oxygen sensor, not a flame detector. Water level is monitored by level controls, not flame detection. Flame color isn’t what this detector uses to determine flame presence; it relies on infrared radiation from the flame to confirm that ignition and ongoing combustion are occurring.

Lead sulfide flame detectors sense infrared radiation emitted by a hydrocarbon flame to confirm that combustion is actually taking place. This type of detector is used to verify that there is a flame at both the burner pilot and the main burner, and it will signal the control system to shut off fuel if the flame is lost. That safety function directly matches detecting the burner pilot and main flame.

Oxygen content would require an oxygen sensor, not a flame detector. Water level is monitored by level controls, not flame detection. Flame color isn’t what this detector uses to determine flame presence; it relies on infrared radiation from the flame to confirm that ignition and ongoing combustion are occurring.