Vulcan Hart 00-854646-00001 Thermocouple

The Vulcan Hart 00-854646-00001 Thermocouple is a safety part to detect pilot flame presence in gas-fired parts. The small metal probe functions as a sensor which produces minimal voltage output when it experiences temperature changes. The thermocouple functions through the Seebeck effect which creates a voltage at metal junctions that differ in composition when they experience temperature variations. The thermocouple produces a voltage after pilot flame heating which maintains gas valve opening so continuous gas reaches the main burner. The safety design of this mechanism stops unburned gas from escaping while it maintains operational safety for parts.