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I've got a very specific question:

When a fire sensor perceives a fire, does it wait 20 or 60 seconds before giving the alarm?

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    $\begingroup$ This may well be the most specific question we have at Aviation! $\endgroup$
    – FreeMan
    Jun 3, 2015 at 15:42
  • $\begingroup$ FreeMan thanks for editing, sometimes I forgot the basic grammar...! $\endgroup$
    – Davide
    Jun 4, 2015 at 6:19

1 Answer 1

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The fire sensor's time to give the alarm is customizable depending upon the fire safety alarm being used. Two widely used types of continuous-loop systems are the thermistor type detectors, such as the Kidde and the Fenwal systems, and the pneumatic pressure detector, such as the Lingberg system. (Lindberg system is also known as Systron-Donner and, more recently, Meggitt Safety Systems.). A typical delay of 10 Seconds is quite common. Here is the Source for your further reading

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