UNITED ELECTRIC CONTROLS B400-120 TEMPERATURE CONTROL B400120

Description:

The United Electric Controls B400-120 Temperature Control is used in industrial temperature monitoring and control systems to provide automatic electrical switching when preset temperature limits are reached. Commonly installed in boilers, heat exchangers, process heaters, storage tanks, industrial ovens, and manufacturing equipment requiring reliable temperature regulation and protection. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement of existing temperature sensing and control systems. The B400-120 is part of the 400 Series temperature controls and features an adjustable temperature range of 0°F to 225°F.

Applications:

The United Electric Controls B400-120 Temperature Control is commonly used in process heating systems, HVAC equipment, chemical processing plants, food and beverage production lines, utility services, and industrial automation installations. The controller utilizes a liquid-filled sensing stem to detect temperature changes and actuates snap-action switch contacts for alarms, shutdown functions, and automatic process control, helping maintain safe and efficient operation of critical industrial equipment. 

Technical Specifications:

• Brand: United Electric Controls
• Part Number: B400-120
• Product Type: Temperature Control
• Series: 400 Series
• Controller Type: Electromechanical Temperature Switch
• Temperature Range: 0°F to 225°F
• Temperature Range Metric: -17.8°C to 107.2°C
• Maximum Temperature: 275°F (135°C)
• Function: Temperature Monitoring and Control
• Sensing Method: Liquid-Filled Immersion Stem
• Stem Material: Nickel-Plated Brass
• Output Contacts: SPDT Snap-Action Switch
• Electrical Rating: 15A @ 480 VAC
• Setpoint Adjustment: Internal Reference Dial
• Enclosure Type: NEMA 4X Weatherproof Housing
• Housing Material: Epoxy-Coated Die-Cast Aluminum
• Scale Division: 5°F
• Stem Diameter: 9/16 in.
• Stem Length: 1-7/8 in. Below Threads
• Suitable for Heating and Cooling Applications
• Designed for Alarm and Shutdown Functions
• Intended for OEM Equipment and Replacement Installations
• Suitable for Maintenance, Retrofit, and Repair Projects
• Engineered for Continuous-Duty Industrial Service

Common Replacements:

• United Electric Controls B400-121 Temperature Switch
• United Electric Controls B121-120 Temperature Switch
• United Electric Controls C120-120 Temperature Switch