The JTW-XCD-SF800 Distributed Fiber Optic Linear Temperature Fire Detector is a continuous distributed fiber optic temperature sensing system. It utilizes Optical Time Domain Reflectometry (OTDR) technology and Raman scattering effect to measure temperature variations along the fiber. In this system, the fiber optic cable serves both as a transmission medium and a sensor. Laser pulses travel along the fiber, interacting with the fiber medium to produce extremely weak backward Raman scattering light (temperature-sensitive anti-Stokes light and temperature-insensitive Stokes light). After being separated by a wavelength division multiplexer, the light intensity ratio and return time of the backward scattered signal light are detected by a high-sensitivity photoelectric detector. This is then followed by high-speed signal acquisition and weak signal processing, providing the intensity ratio and return time of the backward scattered signal light, thereby enabling real-time temperature distribution information.

Product Features

JTW-XCD-SF800 features various alarm algorithms including fixed temperature, differential temperature, and temperature rise, offering sound, light, image, and relay alarm modes. It also provides abundant standard interfaces for easy connection with fire alarm controllers and other fire protection equipment, ensuring good compatibility and scalability.

Applicable scenarios

The Distributed Fiber Optic Temperature Sensing System, as an advanced linear fire detection device both domestically and internationally, boasts advantages such as long measurement distance, no blind spots, and real-time measurement. It is widely used in power, traffic tunnels, subways, petrochemical industries, and dams, among other fields.