Systems with a Continuous Spot Sequence

Record Temperature Profiles over Long Distances

In the case of systems that measure in a dispersed manner, no sensors have to be incorporated into the fiber. Instead, backscattered light is evaluated by the fiber material itself so as to obtain the desired temperature information. These systems are based on the evaluation of Rayleigh scattering and enable the recording of temperature profiles along the glass fiber with millimeter resolution and along sections measuring up to 70 m long. So virtually every point of the glass fiber becomes the sensor. Conventional methods require hundreds or thousands of conventional point sensors with associated cables and an immense amount of time and effort to be spent on installation.


The sensor fibers are generally guided in a capillary or a protective tube to measure the temperature. Depending on the interrogator (readout system) used and the application, these may be low-cost conventional standard glass fibers or even custom-made ones produced by Polytec to suit your individual requirements.