Projected beam smoke detector

The projected beam type smoke detector shall be a 4-wire VDC device to be used with U. An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, typically as an indicator of fire. They are used to detect fires in buildings where standard point smoke detectors would either be uneconomical or restricted for use by the height of the building. Projected Beam Detectors. Copies of this manual are avail-able from System Sensor. The Gamewell-FCI projected beam smoke detector is a transmitter, which projects a modulated infrared light beam on the receiver unit.

The received signal is analyzed in the controller. SPC-PROJECTED BEAM SMOKE DETECTOR OPERATION, continued When there is a difference between actual beam strength and stored reference data that exceeds the programmed alarm obscuration reference level, a fire signal is produced. However, they can be mounted vertically or at any angle to protect the area involved. The Receiver is electrically connected to a Control Unit, the latter being installed at the ground level. Beam Smoke Detector อุปกรณ์ตรวจจับควันด้วยลำแสงบีม แบบธรรมดา.

What can this smoke detector do? Can a smoke detector presence be detected? Will heat make a smoke detector go off? The SPC-detector should be placed so that smoke generated by a fire will likely rise into the path of the beam. The microprocessor shall provide compensation for a change in received signal value, with time, caused by contamination of the optics.

Security Sensors pdf manual download. UL listed products must comply with NFPAEnsure clear line of sight between Detector and Reflector – it is recommended at least 0. Mount securely to solid structural surfaces Position beam as high as possible, but with a minimum distance of 0. This model is four-wire, VDC and includes both the transmitter and receiver. In the event of fire, the generated smoke decreases the amount of light incident on the receiver. Always select a stable mounting surface. The OSI-RI-SS is a single-ende reflected type beam smoke detector that includes an reflector and an integral sensitivity test.

The reflected infrared light is detected by the receiver and analyzed. Smoke in the beam path will reduce the received infrared light proportionally to the density of the smoke. The detector analyzes this attenuation or obscuration of light and acts accordingly.

Beam‑type smoke detectors require visible smoke and might not be as sensitive as ion detectors in some applications. A combination of smoke density and the linear distance of the smoke field create this obscuration across the projected light beam. Each detector consists of a transmitter, a receiver, and a remote indicator plate.

Because the transmitter and receiver typically mount on the ceiling or high on walls or columns, they provide an effective and unobtrusive. According to Annex A, a better alternative would be to use projected beam smoke detector s or, in some applications, air sampling–type smoke detectors. The model MI-LPB2-S2I is an addressable long range projected beam smoke detector designed to provide open area protection.

Smoke entering the area between the two components causes a reduction in the signal returned to the receiver. By using advanced dual wavelength projected beams and optical imaging technology for early warning smoke detection, OSID provides a low-cost, reliable and easy-to-install solution that overcomes typical beam detection issues such as false alarm incidents and alignment difficulties. The unit shall be listed to UL 2and shall consist of an integrated transmitter and receiver.

The beam detector shall operate between a range of and 1feet (and 4m).