The 302-AW-194 Thermotech amount-anticipation heat detector from Honeywell NOTIFIER operates inside a controlled range of two to three levels of their established points, whatever the velocity or amount of temperature rise. This is a Typically-open device designed specifically for hearth detection and alarm techniques. The PAD200-DUCTR is developed and constructed https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/