There's two sorts of set temperature detectors: linear detectors, which keep track of the temperature all over a region, and place detectors, which keep an eye on the temperature in one certain place. The 302-AW-a hundred thirty five Thermotech rate-anticipation warmth detector from Honeywell NOTIFIER operates within a managed range https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/