2BStructure and function
19BDetector
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Building Technologies
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Fire Safety
2015-11-04
3.4.3
Heat detector
The heat detector is a pure heat detector with two thermal sensors. The following
heat detectors are available:
●
FDT241
●
FDT221
The following table indicates the most important differences between the two heat
detectors.
Parameter
FDT241
FDT221
Signal processing
ASA
technology
Detection algorithms
Alarm activation by:
●
Temperature increase
●
Reaching the maximum temperature
●
Temperature increase
Structure and function
1 Heat sensors
As there are two sensors, thermal detection reliability will not fully fail should one of
the two sensors fail or break down.
1