The 302-AW-194 Thermotech rate-anticipation warmth detector from Honeywell NOTIFIER operates in a managed number of two to 3 degrees of their established details, regardless of the velocity or level of temperature increase. This is a normally-open up product made especially for fire detection and alarm units. Innovative mass notification systems https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/