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Linear Heat Detection Systems

 
Chiller Warehouse Protected by Alarmline

Alarmline LHD Systems

Alarmline Linear Heat Detection Systems are more reliable and have lower maintenance costs compared to conventional detectors. Types are available for virtually any environment.
Alarmline Digital
ALARMLINE DIGITAL

Comprises a twin-conductor "switching" cable with temperature-sensitive insulation protected by a special sheath. It operates by melting of the insulation between the conductors at a pre-determined temperature. This creates a short circuit which is detected by a simple electrical device, which in turn provides a fire alarm signal. Fault conditions are detected by continuous monitoring foran open circuit state.
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Alarmline Analogue
ALARMline analogue

Consists of a four-conductor cable surrounded by an outer sheath of PVC. A change in temperature produces a change in resistance, which is monitored byan Alarmline Control Unit, which in turn actuates an alarm signal at a predetermined level. The cable is continuously monitored for open and short circuit fault conditions. It detects either a localised hot spot or a lower level of temperature increrase over the entire length. It is recoverable after operation.
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