Watlow 202-0-21-5 Bulb And Capillary Thermostat Control

The Watlow 202-0-21-5 Bulb and Capillary Thermostat Control provides reliable SPST on/off regulation for industrial heating systems in non-critical processes. This mechanical bulb-and-capillary thermostat switches heat on or off via a sensing bulb and capillary tube across a preset range of 30°F to 250°F. Commonly installed on immersion heaters, process tanks, industrial ovens, and electric heating assemblies, it supports remote or enclosure mounting and is designed for continuous on/off control in non-critical process temperature regulation. Common replacements include Watlow 202-0-21-4, Watlow 202-0-21-6, and Watlow 202-0-4-17 DPST Bulb and Capillary Thermostats. Key specifications: Brand Watlow; Part Number 202-0-21-5; Product Type Bulb and Capillary Thermostat Control; Control Type SPST; Sensing Method Bulb and Capillary; Temperature Range 30°F to 250°F; Operation Mechanical on/off. Applications span immersion heating systems, water and oil tanks, process vessels, packaging equipment, and general process heating where reliable mechanical thermal regulation and automatic heater cycling are required.