BS EN 54-7:2018 Fire detection and fire alarm systems Smoke detectors. Point smoke detectors that operate using scattered light, transmitted light or ionization

Ionization
Fire alarms
Performance
Performance testing
Fire detectors
Fire safety in buildings
Light
Warning devices
Fire safety
Alarm systems
Smoke detectors

Link: BS EN 54-7:2018 Fire detection and fire alarm systems Smoke detectors. Point smoke detectors that operate using scattered light, transmitted light or ionization
Source: BSI Standards