UNITED ELECTRIC CONTROLS B121-121 EXPLOSION-PROOF TEMPERATURE SWITCH W140 THERMOSTAT 200-425 DEG F

Description:

The United Electric Controls B121-121 Explosion-Proof Temperature Switch is used in industrial process heating, oil and gas, chemical processing, power generation, and hazardous-location applications to monitor temperature and provide automatic electrical switching when preset temperature limits are reached. Commonly installed on boilers, heat exchangers, process vessels, pipelines, and industrial equipment requiring reliable temperature-actuated control in demanding environments. Maintenance technicians and system integrators use this part for repair, retrofit, expansion, or replacement of existing temperature monitoring and protection systems.

Applications:

The United Electric Controls B121-121 Temperature Switch is commonly used in refinery operations, chemical processing plants, power generation facilities, industrial heating systems, compressor stations, and process control installations. The explosion-proof enclosure allows the switch to operate safely in hazardous locations while providing dependable temperature monitoring for alarms, shutdown systems, equipment protection, and process regulation.

Technical Specifications:

• Brand: United Electric Controls (UE)
• Part Number: B121-121
• Product Type: Temperature Switch
• Series: 100 Series
• Switch Type: Explosion-Proof Temperature Switch
• Temperature Range: 200°F to 425°F
• Temperature Range Equivalent: 93°C to 218°C
• Function: Temperature Monitoring and Control
• Sensor Type: Local Immersion Stem Thermostat
• Output Contacts: SPDT Snap-Action Switch
• Electrical Rating: 15A @ 125/250/480 VAC Resistive
• Process Connection: 1/2 in. NPT Male
• Enclosure Type: NEMA 4X / Explosion-Proof Housing
• Housing Material: Epoxy-Coated Cast Aluminum
• Suitable for Hazardous Locations
• Designed for Alarm and Shutdown Applications
• Intended for OEM Equipment and Replacement Installations
• Engineered for Continuous-Duty Industrial Service

Common Replacements:

• United Electric Controls B105-121 Temperature Switch
• United Electric Controls E121 Series Temperature Switch
• United Electric Controls H121-121 Temperature Switch