JTW-LD-SF402 Cable Type Linear Temperature Sensor Fire Detector (hereinafter referred to as the detector) is a new type of reusable fire protection patent product that monitors environmental temperature changes, primarily composed of a signal processing unit (microcomputer processor), a temperature-sensing cable, and connection components (terminal box). The detector is capable of responding to temperature alarms and outputting alarm signals.
Product Features
The thermistor cable of the detector is a temperature-sensitive component. The JTW-LD-SF402 thermistor cable is composed of four wires, each extruded with a thermally sensitive insulating material, twisted together (with one wire for enhancing mechanical strength). It can detect temperature changes at any point along its installed length, and it offers the functionality to select between two alarm temperature levels: 85 degrees and 105 degrees. When the temperature rises to the response value, there is a sudden change in resistance between the cores of the thermistor cable, generating a corresponding signal, which is then processed by a microcontroller using fuzzy mathematics to make a fire alarm judgment.
Main features are summarized as follows:
The thermally sensitive cable features stable structure, strong anti-interference capabilities, and excellent resistance to tension and compression.
2. Comprehensive judgment of analog signal collection.
3. Meets the requirements of Section 4.18 in GB16280-2014 for small-size high-temperature response performance testing, and the requirement of Section 12.3.3 in GB50116-2013 that the flame size of the response does not exceed 100mm.
4. The sensor cable remains undamaged after the detector alarms within the safe temperature range, allowing for the cable to be reused.
5. Select from two alarm temperature levels: 85°F and 105°F.
6. Features open circuit and short circuit fault alarms.
7. Signal processing units and connecting components are encased in flame-retardant materials, offering corrosion and aging resistance.
8. Manual fire alarm simulation feature.
9. The detector boasts strong anti-interference capabilities, utilizing isolated detection and software anti-interference technologies, suitable for use in environments with strong electromagnetic field interference.
Applicable Scenarios
The detector boasts excellent environmental adaptability and can operate reliably in close proximity or adjacent to protected areas. It functions effectively in fire detection environments with high humidity, contamination, and dust, making it widely used in warehouses, cargo yards, oil and gas pipelines, transformers, conveyor belts, locomotives, and electrical panels. Particularly suitable for early fire detection in power cables within cable tunnels, cable trays, and cable wells.
