ProReact Digital Linear Heat Detection

Digital linear heat detection cable is often referred to as non-resettable as a physical change takes place in the detection cable once the alarm temperature is reached and the cable must be replaced following a fire or overheat condition. It is constructed of two metal core wires that come into contact at a certain temperature and, in doing so, create a short circuit. This triggers a resulting alarm on the interface unit or fire control panel.

Thermocable has referred to the colour coding for heat detectors within NFPA 72 when designing its products. The colour of its ProReact Digital Linear Heat Detection cable is as follows:

Alarm temperature of 79⁰C and below – Red
Alarm temperature between 80⁰C and 121⁰C – White
Alarm temperature between 122⁰C and 162⁰C – Blue
Alarm temperature between 163⁰C and 204⁰C – Red
Alarm temperature between 205⁰C and 259⁰C – Green

An optional black nylon outer coat and / or a stainless steel outer braid can be added to the majority of our detection cables.

Thermocable typically supplies its ProReact Digital Linear Heat Detection cable on its standard reel lengths of 100m, 200, 500m or 1,000m where available. Alternatively, non-standard lengths can be supplied at an additional cost on request.

Yes, this is possible. Please note that two lengths of digital linear heat detection cable should be connected using a junction box.

Yes, each zone (or “run”) of digital linear heat detection cable should be connected to an end of line unit.

Functional testing of digital linear heat detection by heating a section of cable up until an alarm is initiated is an effective method but can be costly as the section of cable must be replaced following the test.

Alternatively, it is possible to undertake a test using Thermocable’s ProReact Digital EOL unit with Test Facility (SKU: A1385). This unit allowed a functional test to be carried out on the zone of digital LHD cable to verify normal, trouble and alarm functions of the system by simulating a break in the cable or a overheat condition.

Please get in touch with us if you require further clarification on testing a digital linear heat detection system.

The maximum ambient operating temperature of digital linear heat detection cable must be adhered to during transport and storage. Thermocable make this information clear on its packaging for the avoidance of doubt. Detailed information on the ambient operating temperature of linear heat detection products should be listed within the installation manual.