Shop AlarmNet Wired Heat Detectors at GeoArm Security. Discover AlarmNet wired heat detectors including fixed temperature, rate-of-rise, and combination heat sensors designed to provide dependable fire detection in residential, commercial, and industrial environments where smoke detectors may not be suitable. Compatible with Resideo, Honeywell Home, First Alert, VISTA, and Total Connect 2.0 platforms, these professional-grade wired heat detectors deliver reliable life safety protection and support GeoArm 24/7 professional UL-listed central station monitoring or DIY self-monitoring with no long-term contract for enhanced fire and property protection.