Aspirating smoke detector

A smoke extraction system (abbreviation: RAS ) (also Aspirating ARM) is a special fire detectors or replace a small fire alarm system.

Principle of operation

Through an integrated fan the smoke extraction system removes an attached pipe system with defined air sampling air continuously from the monitoring area.

The air samples are supplied to the detection unit and analyzed there using the built-in or the fire alarm sensors to smoke particles. As detectors usually come particularly highly sensitive optical smoke detector used to compensate for the dilution of the smoke through the intake of smoke-free rooms air. The sensitivity of a measuring chamber is shown in light turbidity ( attenuation) per meter ( A light haze from 0.005 to 20 % is not uncommon ). These systems can be optimally adapted to the environmental conditions.

Depending on the system can be connected to a pipe formations of up to 360 meters in total length, which are up to 1440 m². If the pipe system installed in a false ceiling, only a few millimeters large intake holes in the ceiling are visible. This option is especially interesting for cultural goods.

Normal Rauchansaugmeldern is noted that each sensor - generates only a message - that each suction line. A direct assignment example to a particular cabinet is intrinsically impossible.

For special Rauchansaugmeldern at the first alarm detection is done blowing out of the detection tube. Thereafter, the aspirating smoke aspirated again, and measures the time until the smoke arrives back to the evaluation unit. With this method, up to 5 sampling points detect individually and thus evaluate individually.

Areas of application

Typical applications for smoke extraction systems are:

  • Elevator shafts
  • Transformer rooms
  • High-bay warehouse
  • Cabinets
  • Operating warehouses or attics
  • Cable channels
  • Cargo spaces in ships
  • Suspended ceilings, for example, in museums
  • Data centers
  • Cold rooms ( low and medium temperature )

In case of fire alarm systems arises in these cases the problem of annual maintenance, which is very difficult and at considerable time and expense, sometimes only with business interruption, perform. Often you needed for maintenance and expensive auxiliary constructions. A smoke extraction system, depending on the size Replace up to one hundred individual fire detectors. Then needs to be serviced, only the detection unit, the pipe system can be cleaned, for example by means of compressed air.

  • Alerting
  • Fire protection
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