Fire Detection For Hard To Maintain Environments.
Discover fire or an overheat event.. before it’s too late. Cable-based Linear Heat Detection (LHD) can generate an alarm or automatically activate a fire suppression system by detection heat anywhere along its length.
Unaffected by dirty, dusty, damp and humid environments. It’s cost effective to install compared to spot detection and lower maintenance. Do you want to know more?
When Early Detection of Temperature Change is Crucial
- Detect abnormal changes in temperature fast. LHD can be located at the point of risk to protect safety of life or critical assets.
- Resilient to the harshest environments to reduce false alarms. Coated in differing materials to suit specific applications, LHD is unaffected by airflow, chemicals and debris.
- Large areas (up to 3,000 metres) can be protected in one installation. Our LHD provides continuous detection coverage as the whole cable is a detector. Temperature change can be identified at any point along it’s entire length.
- Fit and Forget. When compared to alternative methods of heat detection, LHD is arguably the most time efficient to install, most cost effective and lowest maintenance piece of fire detection equipment.
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Product Overview
We Are The Pioneers In Linear Heat Detection
With over 6 decades of research, development and innovation; our products have been certified by globally recognised test houses to the latest product standards. We offer a full range of cable-based linear heat detections across two distinct ranges.
Fixed Activation Temperature
Two core, non-resettable line type heat detection. Fast to react to an overheat event. Able to detect a small hotspot anywhere, even in in very long zone lengths. Ideal for higher activation temperatures, hazardous applications and areas that experience extreme temperature changes.
Example applications include : solar PV farms, Oil & Gas storage tanks, warehouse racking and cold storage.
Programmable Temperature Sensing
Four core, resettable line type heat detection. Programmable alarm temperatures alongside rate of rise detection and pre-alarm functionality. Ideal for lower activation temperatures and adjusting to ambient temperature changes.
Example applications include : car parks and tunnels for rail, metro, subway, road and access.
Key Sectors Include
Saving Lives and Livelihoods, 1 Metre at a Time
Thermocable has developed a full range of linear heat detection cables and interface modules that provide extensive and continuous coverage, are easy to install and fully integrate with fire detection & alarm systems.
The short answer is no, you do not.Two core, fixed activation (or digital) LHD cable is non-resettable, this means an irreversible change occurs within the cable when it alarms. However, only the section that has alarmed (and we recommend 3 metres either side of that due to heat transfer along the cable) needs to be replaced – not the whole zone length. This type of LHD is triggered at specific temperatures, and is best for higher activation climates, hazardous applications, and areas that experience rapid or extreme temperature changes. It’s also possible to pinpoint whereabouts along the cable the alarm is with fixed activation LHD cable.Four core, programmable temperature (or analogue) LHD cable is resettable, so does not need to be replaced following an alarm or fire, as long as the sensor cable has not been exposed to a temperature above 125 degrees C.Our Programmable Temperature Sensing product is the first cable-based resettable linear heat detector approved to EN54-22. It’s also the only type of cable-based linear heat detector that has automatic ambient temperature adjustments, rate of rise detection and pre-alarm functionality.
Testing is extremely simple, and non-invasive, so no damage has ever been incurred (that we know of)!For fixed temperature products, we have designed in a test switch on our End of Line (EoL) unit. All you do, is press it! While the cable may be installed in roof cavities, etc., the EoL unit is always easily accessible, so there is no requirement for invasive procedures.For programmable products, you can do direct stimulus testing using the test kit we provide. There’s also a printed circuit board (PCB) that can be placed into the controller to simulate different ambient temperatures and alarm temperatures for pre-tests.
For like for like comparison of coverage, linear heat tends to be significantly cheaper. This is because LHD provides continuous coverage with a single installation, while typical spot detection systems require cabling in multiple spot detectors. It is important to factor in the cost of the fire rated cable as well as installation time. Wireless spot detection avoids this cost, but the devices themselves are much more expensive.On top of being more expensive, spot detection can also be less effective and more prone to issues, such as false alarming or blocking in dusty, dirty and damp environments.
Theoretically, you can lay as much cable as you want, providing you install the recommended control panels at stipulated intervals per ‘zone length’.Zone lengths:- 1000m for fixed temperature cable per zone (with 2 zones per controller) - 500m per zone for programmable
Yes. Linear heat detection cable can be installed and used in hazardous areas as it is regarded as a ‘simple apparatus’ given its low voltage and that it does not contain an ignition source.The monitor module or conventional fire alarm control panel should be installed in the safe area and the intrinsically safe (I.S.) barriers separate the safe area and the hazardous area as shown in Thermocable’s hazardous area installation guide.
