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FoBT Sensor


Non-Electrical Dew point and Temperature measurement through a long distance optical fiber probe


Tailored to the current practical requirements, the FoBt Sensor has been developed by the Institute of Nanotechnologies and Optical Technologies (iNano) at the Niederrhein University of Applied Science.

Persistent and unrecognized moisture lead to moisture damage and loss of quality on different kinds of products. The novel optical fiber sensor (FoBt Sensor) from iNano combines the detection of water condensation on the probe tip surface with an active determination of the condensation rate and the temperature measurement at the sensor head. This is made possible through the application of the optical fiber sensor principle and the special design of the probe tip.


  • Non-electrical measurement
  • Simple method of measurement of the condensation rate at a surface and its temperature
  • Usable in sensitive or hazardous Areas
  • Miniaturized structure
  • Science-based measurement results
  • Testable prototypes are available

Scope of application

Due to the non-electrical measuring method, the FoBt sensor can be used not only in the classical condensation-risk environments, but also in particularly sensitive, potentially explosive atmospheres or even in the vicinity of high voltage. The miniaturized structure allows the measurements in inaccessible places and also the subsequent reinstallation of existing products.


The Niederrhein University of Applied Science holds a small patent portfolio for the technology of the optical fiber determination of condensation rate. The functionality of the sensor technology has been demonstrated on a laboratory scale. Different designs and shapes can be made according to customer requests. PROvendis GmbH offers on behalf of the Niederrhein University licenses to interested companies for the utilization of this technology and the production of its parts.

PROvendis GmbH

Dr. Thorsten Schaefer
+49.208 94105-27
Schloßstr. 11-15
45468 Mülheim an der Ruhr

Development status



Optical Technologies, Nanotechnologies, 3771, Provendis, Temperature measurement, fiber, dew sensor, in-situ, condensation rate, prototype, non-electrical

Offer at Providers website

Contact | Main Office

TransferAllianz e. V.
Christiane Bach-Kaienburg
(Managing Director)

c/o PROvendis GmbH
Schloßstr. 11-15
D-45468 Mülheim an der Ruhr