DE.TECT Fire Detection

LIOS DE.TECT is the state of the art fire detection system to provide optimum safety for fire detection in tunnels and other special hazard areas due to its ability to cope with extreme environmental conditions.

Rising demand for fire surveillance in facilities like rail and service tunnels, cable routes and ducts, storage facilities and warehouses or conveyor belts and many other special hazard facilities motivated LIOS Technology to offer a measuring system tailor-made for these industrial applications. One single Linear Heat Detection (LHD) evaluation unit of the DE.TECT series provides fast and spatially well-resolved fire detection along optical fibres with ranges of up to 10 km per channel.

The LIOS products has been successfully proven in critical applications like fire detection in road and rail tunnels and special hazard buildings, power cable and aerial transmission line monitoring, in oil & gas exploration for permanent downhole monitoring and for industrial induction furnaces surveillance, where these systems have been equipped in world-wide projects with more than 2500 permanent installations.

DE.TECT LHD System

DE_TECT718

With DE.TECT temperatures are recorded as a continuous profile along the entire sensor cable compared to a conventional setup using single

The benefit of achieving highly accurate temperatures over great distances at short measuring times is combined with the ease in installation and data acquisition.

Technical Highlights

Linear heat detector for quick fire detection and precise localization of the fire source
Alarm and pre-alarm for each zone
Selectable alarm and pre-alarm criteria
High spatial resolution – down to 0.25 m
Signal processing based on OFDR-Technology (Optical Frequency Domain Reflectometry)
Available with 1, 2 and 4 channels
1000 free programmable zones for each channel
Information regarding magnitude and the direction of the fire spread
Redundant sensor system applicable
Suitable for wind speeds of up to 10 m/s
Laser product class 1M according DIN EN 60825-1: 2007

Sensor Cable

LIOS_sensor_cable2131

LIOS Technology provides the appropriate sensor cable for every application.

One vital component is a tube that accommodates 2 optical fibres. The coatings of the optical fibre can be tailored to optimally suit the required resistance to temperature conditions and mechanical impacts. The wall thickness of the tube sheathing, the material used and additional protective measures as stranded wires or coatings allow for an optimized design.

Versions with an additional stranded wire layer upon the tube are available for fast temperature detection or if stricter requirements apply with regards to tensile strength and mechanical robustness. For applications with a high amount of electromagnetic disturbances like rail tunnels or power supply line tunnels LIOS offers a metal-free cable to minimize the risk of induced voltages. No electronic components are needed along the cable. The sensor is completely passive over its entire detection range.

The DE.TECT fibre optic linear heat detection can therefore be carried out in areas where high safety risks exist, e.g. in areas with a risk of explosion.

DE.TECT Linear Heat Detection Brochure