Honeywell C554A1687 Cadmium Sulfide Cell Kit 15" Leads 7006U

The Honeywell C554A1687 Cad Cell Kit, with 15” leads, is an essential part of oil burner primary controls. This kit contains a cadmium sulfide photocell, or a “cad cell” which is used as a flame sensor. The cad cell’s resistance varies depending on whether light is coming from the oil burner flame or not. When the burner lights, the light from the flame lowers the cell’s resistance, which in turn tells the control to continue operation. If the flame is not produced, the resistance rises and the control turns off the burner to avoid a hazard. This product is installed mainly in the residential and commercial oil-fired furnaces and boilers to prevent fuel buildup in the event of failed ignition, which may lead to dangerous conditions.