Invensys TC-4112 Industrial Time Delay Relay Module

The Invensys Barber Colman TC-4112 is a two-position, single-stage industrial thermostat with a 6-foot capillary sensor and a setpoint range of 100°F to 260°F, designed for indoor temperature control in equipment. It uses SPDT contacts to switch downstream loads as the sensed temperature crosses the setpoint, making it suitable for simple heating or cooling control tasks in equipment where a mechanical thermostat is preferred. The unit is housed in a NEMA-1 enclosure for indoor installations and is sold under the Barber Colman line, an Invensys brand. Note that this model has been discontinued by the manufacturer, with listings indicating discontinuation in 2022. The combination of a long-capillary sensing element, a broad temperature range, and a robust mechanical switching output provides reliable, low-maintenance temperature regulation for industrial equipment where precise digital controls are not required.