United Electric Controls B105-121 Temperature Switch 100 Series

Description:

The United Electric Controls B105-121 Temperature Switch is used in industrial process heating, heat tracing, freeze protection, and equipment temperature monitoring systems to provide automatic temperature-actuated switching. Commonly installed in piping systems, storage tanks, heat exchangers, boilers, and process equipment requiring reliable temperature control and alarm functions. Maintenance technicians and system integrators use this part for repair, retrofit, expansion, or replacement of existing temperature monitoring systems. The B105-121 features an adjustable temperature range of 200°F to 425°F with a local immersion stem sensing element.

Applications:

The United Electric Controls B105-121 Temperature Switch is commonly used in industrial process plants, OEM equipment, heat tracing systems, freeze protection applications, fire suppression systems, and utility installations. The switch provides dependable temperature-actuated electrical switching for alarms, equipment shutdown, heating control, and process regulation in demanding industrial environments. It is part of the United Electric 100 Series, designed for safety, alarm, and equipment protection applications. 

Technical Specifications:

• Brand: United Electric Controls
• Part Number: B105-121
• Product Type: Temperature Switch
• Series: 100 Series
• Switch Type: Electromechanical Temperature Switch
• Temperature Range: 200°F to 425°F
• Maximum Temperature: 475°F
• Sensor Type: Local Immersion Stem
• Stem Material: Nickel-Plated Brass
• Process Connection: 1/2 in. NPT Male
• Stem Size: 9/16 in. OD × 1-7/8 in. Below Thread
• Output Contacts: Single SPDT
• Electrical Rating: 15A @ 125/250/480 VAC Resistive
• Enclosure Type: NEMA 4X Weatherproof
• Housing Material: Epoxy-Coated Cast Aluminum
• Setpoint Adjustment: Internal Reference Dial
• Application: Industrial Temperature Monitoring and Control
• Engineered for Continuous-Duty Industrial Service

Common Replacements:

• United Electric Controls B100-121 Temperature Switch
• United Electric Controls B105-120 Temperature Switch
• United Electric Controls E121 Series Temperature Switch