Siemens FDT241 - Wide-spectrum smoke detector

2BStructure and function
19BDetector
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Building Technologies
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Fire Safety
2015-11-04
3.4.2 Wide-spectrum smoke detector
The wide-spectrum smoke detector is an optical smoke detector with an optical
sensor. It works according to the principle of forward scattering. This detector
reacts with extreme sensitivity to light fire aerosols. The following wide-spectrum
smoke detectors are available:
● FDO241 (with ASA technology )
● FDO221 (with detection algorithms)
Structure and function
1 Labyrinth 2 Forward scatterer
The wide-spectrum smoke detector has the same measuring chamber as the
neural fire detector; however, it only has a forward scatterer. The increased
sensitivity makes the early detection of smoldering and open fires possible.
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2