
Mechanical Temperature Controls
Reliable Thermal Response for Detection, Control, and Safety
Mechanical temperature controls play a critical role in fire protection and equipment safety by responding to changes in heat without the need for complex electronics or external power. These devices provide dependable, real-time thermal responses for detection, control, and system activation across a wide range of environments.
As part of the Fenwal Controls portfolio within the KiddeFenwal family of brands, these solutions are engineered for durability, accuracy, and long-term performance in industrial, commercial, and specialized applications. Whether used for fire detection, temperature regulation, or equipment protection, mechanical temperature controls serve as a foundational layer in comprehensive fire protection and safety strategies.
Strut & Tube Devices
Rate-Compensated Detection and Rapid Thermal Response
Strut & tube devices are designed to detect temperature changes with high accuracy by responding to both ambient conditions and rapid heat increases. These technologies are widely used in fire detection and release applications where early, reliable activation is critical.
Ideal for environments where false alarms must be minimized without sacrificing responsiveness; these devices provide dependable performance across a range of hazard conditions.
Key Products Include:

THERMOSWITCH™
A proven temperature control solution designed to provide precise thermal response for equipment protection and process control across a wide range of applications.

DETECT-A-FIRE®
A pre-engineered wet chemical fire suppression system designed to protect commercial cooking appliances and associated ductwork.
Strut-and-Bridge Device
Surface-Mounted Temperature Control for Direct Response
Strut-and-Bridge devices provide direct, surface-mounted temperature sensing for applications requiring fast, localized thermal response. These controls are ideal for equipment and systems where temperature changes must be monitored at the point of contact.
Designed for simplicity and durability, these devices offer consistent performance in environments where mechanical reliability is essential.
Key Products Include:
Bi-Metallic Devices
Snap-Action Temperature Control for Fixed and Limiting Applications
Bi-metallic devices use the differential expansion of metals to deliver precise, repeatable temperature control. These solutions are commonly used for fixed temperature detection, limiting functions, and system safety shutoff.
With simple, reliable operation and proven performance, bi-metallic controls are well-suited for applications requiring consistent actuation at specific temperature thresholds.
Key Products Include:

Snap Disc Controls
Bimetal snap-action devices designed for reliable temperature limiting and control across a variety of equipment and system applications.

Integrated Thermal Protection
Across the KiddeFenwal Ecosystem
Mechanical temperature controls are a critical component of a broader fire protection strategy. When combined with KiddeFenwal detection, control, and suppression technologies, these devices support coordinated system response, improved reliability, and enhanced protection of people, property, and processes.
From early heat detection to equipment-level temperature control, Fenwal Controls solutions deliver trusted performance backed by decades of engineering expertise.
Built for Reliability. Designed for Protection.
Explore Fenwal Controls mechanical temperature solutions or connect with our team to find the right fit for your application.





