Esser 802271 IQ8Quad Rate-of-Rise Heat Detector with Isolator

The Esser 802271 is a dual-function thermal detector that provides comprehensive fire protection in areas where smoke detection is impractical. It features a high-speed semiconductor sensor that monitors the rate-of-rise (RoR) in temperature; if the heat increases faster than a specified threshold, an alarm is triggered. For slow-burning fires that may not cause a sudden spike, it also includes an integrated fixed-temperature function. This makes it exceptionally reliable in “dirty” or smoky environments like garages, boiler rooms, and industrial workshops. The unit is equipped with a built-in short-circuit isolator, ensuring that a wiring fault does not compromise the entire loop, and it supports decentralized intelligence for autonomous operation during communication failures.