The Spanish National Research Council (CSIC)
have developed a humidity senso r. This sensor allows to
detect and quantify the surrounding humidity by optical transduction. The device is based in the optical
response of a photonic crystal. This humidity sensor has been successfully tested showing response
times under one second.
Industrial partners manufacturers of sensors are being sought to collaborate through a patent license
agreement.
An offer for Patent Licensing
Immune to electromagnetic interference
https://creativecommons.org/licenses/by-sa/3.0/deed.en ©Brocken Inaglory The most widely used transduction methods to measure humidity are based on MicroElectroMechanical (MEMs) systems. Among MEMs, capacitive sensors are commonly used. This type of sensors shows transduction process in the scale of ten seconds, they are very sensitive to electromagnetic noise and remote measurements are not possible.
The humidity sensor developed by CSIC is based on a photonic crystal, in particular in an artificial opal. The humidity is measured from the optical changes in the crystal with water adsortion. Since this device is based in photonic means, it allows remote detection and quantification of humidity.
Besides, it´s immune to electromagnetic noise. In contrast to other systems based on capacitive elements, this novel device shows quick response, being less than one second, at the time that exhibits high sensitivity.
Main innovations and advantages
· Quick response and good sensitivity.
· The sensitivity of this sensor can be adjusted by tailoring differentproperties of the responsive element.
· It can be miniaturized · Due to its robustness and durability, this sensor is suitable for adverseenvironments, e.g. those with high electromagnetic/nuclear radiation,exposed to high corrosion, etc.
· The manufacturing of the crystal is simple and it doesn’t require post-processing steps.
The Spanish National Research Council (in Spanish 'Consejo Superior de Investigaciones Científicas (CSIC)') is a government agency for basic and applied scientific research.
It is the largest public research organization in Spain, with presence in all the Autonomous Communities through 126 centers and 145 associated units.
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