Industrial B-1C Temperature Controller Module

The Burling Instrument Company B-1C Temperature Controller Module is an 8-inch industrial temperature control device that uses a single-pole, double-throw (SPDT) switch to regulate heating elements in equipment. Listed specifications vary by unit, but common catalog entries describe a 100–600 °F setpoint range, a maximum temperature up to 725 °F, and operation on line voltages of 125, 250, or 480 VAC. In some listings it's described as a temperature switch rather than a controller, while others classify it as a temperature controller, indicating the module's role as a controllable switch in temperature regulation. This Burling part is documented as made in the USA and carries the B-1C model designation, aligning with other Burling instrumentation used in industrial heating control.