HUMIDITY SENSOR DEVICE BASED ON IRON OXIDE NANOPARTICLES THAT ARE SUPPORTED ON SEPIOLITE, PRODUCTION METHOD THEREOF AND APPLICATIONS OF SAME

摘要

The invention relates to a humidity sensor which is based on an active powder comprising iron oxide nanoparticles that are supported on microfibres of sepiolite. Depending on the content of said nanoparticles, the sensor can operate within a wide RH range (0 - 80%) with a rapid reproducible response (10 s) and with no hysteresis phenomena. According to the invention, the iron oxide nanoparticles are embedded in the sepiolite microfibres and, as a result, the sensor is environmentally resistant.