Where can you use a beam detector?
Beam type smoke detectors are mostly used in places with high ceilings like basketball courts, warehouses, movie theatres etc. Detection with optical smoke detector can be slow in these places. Because smoke has to reach the detector mounted to the ceiling.
What distance does a smoke detector cover?
Smoke detector covers 100m2. Should not exceed 7.5m from any point. General spacing guidance: 5m from a wall, 10m between detectors. Do not site detectors less than 1m from air inlets or air conditioning units.
How do you measure smoke detector spacing?
Now this is no big surprise. We know that smoke detector spacing is determined by the manufacturer’s recommendations which is typically around 30′. If we take 30′ and multiply it by 0.7 we arrive at a new spacing for smoke detectors of 21′.
What is addressable beam detector?
Beam Detectors are used to provide “open area” smoke detection in situations where it is either impractical or not cost effective to use traditional point-type detectors or aspirating smoke detection. …
What is duct detector?
A duct smoke detector is a device or group of devices used to detect the presence of smoke in the airstream of ductwork sections of the HVAC air handling systems typically used in commercial buildings.
What is the maximum height for a smoke detector?
Mounting Heights
| Detector Type | Maximum Ceiling Height (m) Cat L/P |
|---|---|
| Smoke Detectors | 10.5 Metres (12.5 metres for 10% of Ceiling) |
| CO Point Detectors | 10.5 Metres (12.5 metres for 10% of Ceiling) |
| Optical Beam Detectors | 25 Metres (25 metres for 10% of Ceiling) |
How far can a smoke detector be from a bedroom?
twenty feet
f. Smoke Detectors are recommended to be a minimum of 36 inches from an HVAC supply vent, ceiling fan blade tip or bathroom door with a shower or tub. g. The maximum allowable distance from a hallway smoke detector to a bedroom is twenty feet on an unobstructed ceiling.
What is the 0.7 rule?
NFPA 72 requires that all points on the ceiling have a detector within a distance of 0.7 times the listed spacing of the detector.
How many smoke detectors can you have in one loop?
How many smoke detectors can you have in one loop? There is a maximum number to interconnect smoke detectors, which are 12 if we are referring to the NFPA 72 standards. Then you must ensure at all times that each of the smoke alarms offers the necessary compatibility to interconnect.
How does a beam detector work?
Optical beam smoke detectors work on the principle of light obscuration, where the presence of smoke blocks some of the light from the beam,typically through either absorbance or light scattering. Once a certain percentage of the transmitted light has been blocked by the smoke, a fire is signalled.
How big of an area does a beam smoke detector cover?
Beam smoke detectors generally have a maximum range of 330 feet and a maximum spacing between detectors of 60 feet. This gives the beam smoke detector theoretical coverage of 19,800 square feet.
What is the range of a beam detector?
BEAM RANGE This is the total distance between the beam transmitter and receiver for End-to-End type detectors, and transmitter / receiver to reflector for reflective type detectors. This is often expressed as ‘A to B’, where A is the minimum operating range from 0, and the B to the maximum operating range from 0m.
Which is the best definition of detector coverage?
DETECTOR COVERAGE Detector coverage is the area, is simply the width/orbital coverage from the detector in which a fire detector is considered to effectively sense an emerging fire. This area is defined by local and international standards.
What makes an optical smoke detector so good?
This makes optical beam smoke detectors ideal for protecting long distances (up to 120m for a single beam), providing that the beam is completely unobstructed and correctly aligned with the detector. Did you know?