Thermotech 302-ET-135 135°F All Weather Heat Detector with Hexagonal Grip Bushing, Vertical Mounting FM and UL

Designed for dependable early fire detection in challenging environments, the Thermotech 302-ET-135 heat detector delivers consistent performance for commercial security, surveillance, and fire monitoring applications. The Thermotech 302 Series combines a 135°F fixed-temperature element with rate-anticipation technology, holding activation within a tight 2–3°F tolerance so alarms trigger accurately regardless of rapid temperature changes. Built for all-weather use, the weatherproof housing and vertical-mount form factor with a hexagonal grip bushing let technicians install and service units quickly without a special backbox. UL and FM listings provide assurance for code-compliant installations in warehouses, data centers, parking garages, and industrial facilities. Wired connectivity and a self-restoring design reduce downtime and maintenance costs while integrating seamlessly into existing security and fire control panels. Specify the Thermotech 302-ET-135 for reliable, low-maintenance heat detection in your next fire monitoring or security system deployment—contact us to order or to discuss system integration.

• Reliable early detection with rate-anticipation to reduce false alarms and speed response
• All-weather, weatherproof design for indoor/outdoor security and surveillance monitoring without special backbox
• 135°F fixed-temperature rating with controlled 2–3°F activation tolerance for consistent performance
• Hexagonal grip bushing and vertical-mount form factor for fast, tool-friendly installation
• FM and UL listings ensure code compliance and confidence for commercial fire and security systems
• Self-restoring operation reduces maintenance and eliminates manual resets after transient temperature events