What is linear heat detection?
Signaline Linear Heat Detectors are specialist cables designed to sense heat or sudden increases in temperature anywhere along their entire length.
They are also know as line type heat detector.
They are designed to be used in commercial and industrial fire alarm systems.
Signaline Linear Heat Detectors can often be cheaper to install than conventional point type heat detectors and are more efficient in enviornmentally harsh areas.
There are two types of Linear Heat Detector cables:
Non-Resetable Line Type Heat Detectors; these are linear heat detection cables that can not be reset after an alarm event. Signaline FT or Signaline FT-EN is our non-resettable line type heat detector options
Resetable Line Type Heat Detectors; these are linear heat detection cables that can be reset after an alarm event. Signaline HD is our resettable line type heat detector options
Where are Signaline HEAT linear heat detectors used?
There are many places where Signaline Linear Heat Detectors can be used effectively. Here are some examples:
|Power stations||• Coal conveyors|
|• Power cable tunnels|
|• Cable trays|
|Vehicles||• Engine bays of earth moving vehicles|
|• Heavy goods vehicles|
|• Military vehicles|
|Railways||• Engine locomotives|
|• Signal cable trays|
|Ships||• Car ferry vehicle decks|
|• Engine rooms|
|Petro-chem.||• Floating roof tanks|
|Airports & public transport
|• Moving walkways|
|Tunnels||• Road tunnels|
|• Access tunnels|
|Car parks||• Multi storey or basement car parks|
|Warehouses||• Storage racks|
|• Cold storage rooms|
|Offices & shopping malls||• Escalators|
|• Basement car parks|
|• Plant rooms|
|• Stand-by gen-set rooms|
What is the difference between Signaline HD, Signaline FT and Signaline FT-EN Linear heat detection cables?
When a specified temperature is reached the construction of the cable breaks down to form an electrical closed contact. At the alarm temperature the cable acts like a closing switch.
Signaline FT and Signaline FT-EN cannot be re-used after an alarm event. Once it has gone into alarm it must be replaced.
This type of cable is also somtimes known as Digital Linear Heat Detectors.
Signaline FT-EN is EN54 part 28 approved.
Signaline FT is UL and FM approved.
Signaline HD is resetable line type heat detector. Whereas Signaline FT is an on/off alarm, analogue cables monitor the rise in temperature. An electronic controller connected to the cable monitors the condition of the cable to sense any change in temperature. This is done by continually measuring the electrical resistance in the cable between the metallic core and the outer braiding. If the change in temperature is sufficient the controller recognises the change in resistance and creates an alarm.
The controller is easily adjusted for the length of cable being used. Most importantly Signaline HD linear heat detector cable is a resetable line type hear detector and therefore will reset itself after an alarm when the cable has cooled down.
Both fixed temperature and analogue linear heat detector cables can be easily integrated into intelligent fire alarm systems.