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Linear Heat Detection in Special Applications (NKT Photonics)
Topic: FOSA Case Studies
Owner: FOSA Staff
Date: 2019-12-20
Subtopic:

A major advantage of the linear heat detection (LHD) technology is the immunity to electromagnetic interference, dust, chemicals, moisture, vibration and other environmental factors. Since no electrical energy is used in the sensor cable and the optical energy can be safely limited, such systems can also be applied for fire detection in explosive areas. We present some new special applications where LHD is advantageous compared to other fire detection technologies.

The linear heat detection system LHD3 is suitable in a wide range of applications with special demands. The various types of sensor cables offer immunity against EMC, harsh environment and the suitability in a wide temperature range. The light wave guide as distributed fibre optical sensor is mechanically protected by the sensor cable design. The LHD3 interrogator is capable of parameterisation. Short measuring cycle times and high spatial resolution are available for up to 10km per measuring channel. The parameterisation of alarm zones along the sensor cable enables the alarm and event processing on the basis of the measured temperature profile of the entire sensor cable. Alarms, events and the temperature data can be communicated via a number of standard protocols.

The current applications include fire detection in chemical plants, galvanization, pickling lines, floating roof tanks, conveyor belts, park garages, cable systems to concert halls. Further applications can be easily accessed due to the adaptability of the technology.


Download File   Linear Heat Detection in Special Applications - NKT Photonics.pdf