The 302-AW-194 Thermotech rate-anticipation warmth detector from Honeywell NOTIFIER operates within a controlled range of two to a few levels of their established points, whatever the pace or rate of temperature increase. It's a normally-open up device intended especially for fireplace detection and alarm programs. By far the most noteworthy https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/