Humidity Sensor Printed on Textile with Use of Ink-Jet Technology

Abstract

The paper presents a humidity sensor which was directly printed on textile using the ink-jet printing technology. Fabricated sensors were tested in a controlled environment at 25 °C and 5-95% of RH. The measured impedance modulus versus humidity for the Nafion sensitive layer shows a non-linear distribution over the range from 40 to 95% of RH with dependence on measurement frequency. Obtained results show sensor potential for gas humidity monitoring as integrated sensors with “smart” textiles.