Protectowire Linear Heat Detector, the main component of our linear heat detection systems, is a proprietary cable that detects heat conditions anywhere along its length. Available in a range of alarm temperatures and jacket models to suite a vast array of fire detection applications.
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.
Protectowire Dual Temperature Linear Heat Detector, Type TRI™ is a unique sensor cable that detects heat anywhere along its length. The Detector is comprised of three steel conductors each individually insulated with a unique 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 designed to provide excellent mechanical and environmental protection.
The Detector is a dual temperature digital sensor, and is therefore capable of initiating separate pre-alarm and alarm signals once each of its rated activation temperatures is reached. At each of the rated temperatures, the heat sensitive polymer insulation yields to the pressure upon it, permitting the inner conductors to move into contact with each other thereby initiating the appropriate pre-alarm or 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. Protectowire Dual Temperature Linear Heat Detector, Type TRI™ provides the advantages of line coverage with point sensitivity and multiple temperature sensing, all in one.
When used with a Protectowire FireSystem Control Panel, the Detector will sense and activate a display, showing the location of an overheat or fire condition anywhere along its length. The Detector also meets intrinsically safe standards for Class I, II, or III, Div. 1, Applicable Groups C, D, E, F & G hazardous areas, when the appropriate FM approved Protectowire control panel option is ordered.