Analog Type Linear Heat Detector   Model: JTW-LD-WT303/303P

This kind of Analog Linear Heat Detector has the character of high impedance. The conductors are covered by NTC materials and the changes of its resistance will reflect the changes of temperature. This change can be detected by the Control Unit.

Applications:

●Cable tray, Cable tunnel, Cable trench, High-voltage cable.

●Highway tunnel, Subway tunnel, Dam.

●Rail tunnel, Utility tunnel.

●Convey belt, Coal conveyor, Coal storage yard.

●Oil tank, Gas tank, Oil convey pipeline, Gas pipeline.

●Warehouse etc.

Technology Principle:

Technology advantages:

●With a continuous sensitivety, the sensitivety does not change with the ambient temperature and using length;

● If alarming in the range of safe temperature while the sensor cable is not damaged, it can be reused;

●The sensor cable with a inter shielded layer, it can be applied to strong electromagnetic interference place;

●The sensor cable has high extrusion sheath which with a strong corrosion resistance and wear resistance;

● It is well suited for narrow, dangerous and other hazardous environments.

Introduction of LHD Control Unit:

The control unit is to monitor sensor cable’s signal change and connect with fire alarm controller. Control unit has fire alarm and fault relay output. It is not only used as a separate loop but also connected with fire alarm controller through input module.

Control unit continuous monitoring detection zone’s fire, open and short circuit, these signals display on control unit’s panel, fire signal with red light, fault with yellow light.

Since the fire alarm lock function, it should be reset after the fire alarm triggered.

The functions of control unit:

●Control unit built-in high-performance MCU, adopts intelligent algorithm with high reliability and stability:

●Control unit has multiple monitor functions, it monitors not only fire alarm but also sensor cable’s open and short circuit;

●Good compatibility, signal output adopts fire alarm and fault potential free contact combination, it can be conveniently connected with fire alarm system through input module;

●Strong anti-interference capability, adopts isolate test and software anti-interference technology, it can be applied to high electromagnetic interference places;

●Level of protection is IP66,anti-impact properties is IK10.

EOL Box:

EOL Box is used for analog Linear Heat Detection Cable. The function is to balance the signal of Linear Heat Detection Cable.

Linear Heat Detection Cable  JTW-LD-WT-303

The sensor cable has a high impedance characteristic, outside both metal conductor with a insulation layer which is made from a special NTC （Negative Temperature Coefficient）material, control unit can reflect the heat changing by monitoring the material resistance’s change. The resistivity shows a continual decrease with the increase of temperature.It will be output a fire alarm signal if arrived the pre-alarm temperature.

Linear Heat Detection Cable  JTW-LD-WT-303P, Outer metal braided structure enhance the tensile strength and capacity of resisting disturbance,

Applied to explosion-proof place or electromagnetic interference place.