Novel screen printed humidity sensor on textiles for smart textile applications

In this contribution we will report about design and fabrication of humidity sensors on Polycotton fabric by the use of screen printing technique. Nafion® was used as sensitive material. The fabricated devices were tested between 30%RH and 90%RH also varying temperature in the range of 15°C and 35°C. The complex sensor signal was measured using a gain/phase analyzer in a frequency range between 10Hz and 100kHz. The fabricated devices indicated a non-linear dependency to humidity for different measurement frequencies. The obtained results show the potential of integrating gas sensors into textiles.