The 302-ET-194 Thermotech fee-anticipation heat detector from Honeywell NOTIFIER operates in a managed choice of two to 3 degrees of their set points, whatever the velocity or fee of temperature rise. A pull station is probably the fire alarm program ingredient you’re most familiar with. It’s a manually operated gadget https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/