3
Structure and function
Point detector
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Building Technologies
A6V10316298_e_en_--
Fire Safety
2014-05-21
3.2 Point detector
3.2.1 Multi-sensor fire detector
The multi-sensor fire detector OH110 is a multiple-criteria fire detector with one
optical and one thermal sensor.
Structure and function
1
2
3
4
1 Labyrinth
3 Optical receiver
2 Optical transmitter
4 Heat sensor
The point detector has a high-quality opto-electronic measuring chamber. The
measuring chamber contains:
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One optical transmitter
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One optical receiver
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One thermal sensor
The transmitter lights up the smoke particles. The scattered light then hits the
receiver (photodiode) and generates a measurable electric signal.
In addition, the heat sensor makes it possible to detect fires in cases where no
smoke has been generated.
The combination of optical and thermal sensor signals optimizes detection
reliability with the following benefits.
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Early detection of all types of fire, whether they generate light or dark smoke, or
no smoke at all.
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The fire detector can be operated at a lower sensitivity level, thus achieving
improved immunity against false alarms which may be caused by cold
aerosols. In the event of an open fire, the smoke sensitivity level is raised by an
increase in temperature which makes rapidly burning fires easier to detect.
The multi-sensor fire detector OH110 has two parameter sets: 'Robust' and
'Sensitive'.
See also
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