The sensor cable is comprised of two steel conductors individually insulated with a heat sensitive polymer. The insulated conductors are twisted together to impose a spring pressure between them, then wrapped with a protective tape and finished with an outer jacket suitable for the environment in which the detector will be installed. LHD lineer heat dedector is a fixed temperature digital sensor and is therefore capable of initiating an alarm once its rated activation temperature is reached. At the rated temperature, the heat sensitive polymer insulation yields to the pressure upon it, permitting the inner conductors to move into contact with each other thereby initiating an alarm signal. This action takes place at the first heated point anywhere along the detector’s length. It does not require that a specific length be heated in order to initiate an alarm nor is system calibration necessary to compensate for changes in the installed ambient temperature. Linear heat detector provides the advantages of line coverage with point sensitivity
When the heat sensitive polymer reaches a constant temperature value, it separates between the conductors and the conductors come into contact with each other. It can be monitored with a module that gives alarm, in the which meter and can transfer information, to the fire detection and alarm panel. Calibration is not required for the LHD detection cable.
Features and Benefits
- Identifies and displays the alarm location on the control panel
- Sensitivity does not affected by ambient temperature and cable length
- Resistant to mechanical damage
- Easy to assemble
- Suitable for use on different geometric surfaces, wide open areas, turns
- Easy to use in difficult and dangerous areas
- Wide temperature values with 68°C 88°C 105°C 138°C 180°C temperature
- 2 levels of application options as pre-alarm and alarm
Application areas
- Cable trays
- Conveyors
- Power distribution apparatus: switchgear, transformers, motor control centers,… etc.
- Dust collectors / baghouses
- Cooling towers
- Warehouses / rack storage
- Mines
- Pipelines
- Bridges, piers, marine vessels
- Refrigerated storage
- Tank farms
- Aircraft hangars
