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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.
Signal processing
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.
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