FIRERAY PRODUCT GUIDE
Page 14
4.5 Comparison with Point Type Detectors
4.5.1 High Air Velocity
Point Type Detector
High Air Velocity may blow smoke out of the sensing chamber
Optical Beam Smoke Detector
High air movement does not have as great as effect on Optical Beam Smoke Detector’. An Optical
Beam Smoke Detector’s sensing range can be typically as long as 100 metres. It is therefore less
likely smoke will be blown out of the Optical Beam Smoke Detector’s sensing range.
4.5.2 Coverage / Spacing
Point Type Detector
Radius = 7.5 metres
Distance between detectors = 10 metres
Qty required to cover 1500m² = 15 units minimum
Optical Beam Smoke Detector
Lateral coverage = 7.5 metres either side
Distance between detectors = 15 metres
Qty required to cover 1500m² = 1 unit
4.5.3 Installation / Maintenance in Wide Area’s
Point Type Detector
To all detectors situated across the ceiling, which require individual connection / testing
Optical Beam Smoke Detector
Along the end walls only
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