Which component uses a lead sulfide cell?

The lead sulfide cell is utilized in flame scanners to detect the presence of a flame in a combustion system. This type of sensor operates by measuring changes in electrical resistance due to the varying presence of light emitted by the flame. When a flame is present, the lead sulfide cell generates a signal that corresponds to the intensity of the light it detects.

This capability is critical for ensuring safe boiler operation, as it helps prevent unsafe conditions that could arise if the flame were to go out unexpectedly. Flame scanners are essential components in various types of combustion equipment, particularly in industrial boilers where the monitoring of flame status is key to efficient and safe operation.

In contrast, other options do not utilize lead sulfide cells for their operation. Feedwater regulators manage the flow of water into the boiler without involving flame detection technologies. Boiler stays are structural components that provide support and stability to the boiler and do not incorporate any electronic sensing mechanisms. Pressure gauges measure the pressure within the boiler system but also do not use lead sulfide cells as they function based on mechanical or analog principles rather than flame detection.