Fire Alarm Detector Types: Optical Smoke, Ionisation, Heat, Multi-Sensor and Beam Detectors — When to Use Each
Optical smoke (smouldering fires; false alarm from steam/dust); heat A1 54–65°C (kitchens, plant); multi-sensor optical+heat (best false alarm rejection, sleeping areas); beam (warehouses, atriums >10.5 m); ASD Class A (data centres, museums); CO detector BS EN 54-26 (sleeping risk)