LIOS DE.TECT Linear Heat Detection

LIOS DE.TECT is a robust linear heat detection system based on optical fibers. With a range of up to 10 km and a sampling interval down to 25 cm, the system is ideal for fire detion in tunnels and metros as well as large facilities like warehouses and industrial facilities. Moreover, the optical system is well suited for hazardous environments such as those found in chemical plants, coal storage facilities, mining conveyor belts, or other facilities requiring ATEX certification. LIOS DE.TECT offers fast, accurate and reliable linear heat detection in any environment.

All components of our LIOS DE.TECT Linear heat detection system meets all requirements of fire detection and even the front plate meets EN54  – ensuring you with the safety of knowing that your project is safe with us no matter the challenges. The linear sensor is purely passive and remains unaffected by rough conditions and electromagnetic disturbances and the DE.TECT operates in temperatures from -10°C to +60°C, so no matter the application or the environment there is a solution that fits your requirements.

One single evaluation unit of the DE.TECT series provides fast and spatially well-resolved fire detection along optical fibers with ranges of up to 10 km per channel. With DE.TECT, temperatures are recorded as a continuous profile along the entire sensor cable providing the operator with a full overview compared to a conventional setup using single point-type sensors. The benefit of achieving highly accurate temperatures over great distances at short measuring times, is combined with the ease in installation and data acquisition in a system made to cover all applications where early and precise fire detection is necessary.


  • Quick fire detection and precise localization of the source
  • Information on magnitude and direction of the fire spread
  • Alarm and pre-alarm for each zone
  • Selectable alarm and pre-alarm criteria
  • Sampling interval down to 0.25 m
  • 10,000 m detection range
  • Easy to integrate in fire management systems


Contact us now

1 Channel Models 1, 2, 4, 6, or 10 km sensor cable (distance range)
2 Channel Models 1, 2, 4, 6, or 10 km sensor cable per channel
4 Channel Models 1, 2, 4, or 6 km sensor cable per channel

Electrical Data

Programmable Inputs 4 (Optional up to 40)
Programmable Outputs (potential-free) 12 (Optional up to 106)

Mechanical data

Controller 19" rack / 3 units of height
Dimensions (HxWxD) 13.5x44.9x29 cm
Weight 13 kg

Electrical data

Operating Voltage (DC Controller) DC 12 ... 48 V
Mains Voltage (AC Controller) Ac 100 ... 240 V
Power Consumption (DC Controller) <25W (max. 45 W/60°C
Communication interfaces LON, TCP/IP, Modbus, RS232, USB

Optical data

Fiber type Gradient index 62.5/125 µm multimode
Optical Connector E2000 / APC
Laser Clasification Class 1M (EN60825-1)

Environment Conditions

Storage Temperature -35 ... +75°C
Operating Temperature -10 ... +60°C
Humidity (non condensing) ≤95% rel.
Protections class (IEC 60529) IP51


VdS (pr EN 54-22) G 211030, response classes A1N, BN, CN
UL S25135

Why optical linear heat detection?

Optical linear heat detection offers a range of advantages compared to traditional electrical methods such as thermo couplers or protectowire.

Practical, Field-tested and Approved

Driven by demanding requirements from today’s safety market LIOS DE.TECT provides a highly proven product based on fulfilling international quality standards recognized by the

  • VdS (Association of German Property Insurers)
  • prEN 54-22 Class A1N
  • ISO 9001 and ISO 14001
  • TÜV Rheinland n CE (Electromagnetic Compliance, Europe)
  • UL 521, ULC S530 spacing up to 50ft
  • ATEX certified