Various types of hygrometers and humidity sensors can. The obtained results show the potential of integrating gas sensors into textiles. A dew sensor can detect dew formation on a surface and determine the dew point temperature of a medium. The fabricated devices indicated a non-linear dependency to humidity for different measurement frequencies. Yarn quality - correct humidification will maintain yarn strength and elasticity, producing a better quality product with higher margins.

In essence, the functional yarns with proper structure, would be an excellent candidature to the yarn-shaped humidity sensor, in which there are good performance and wide application possibilities, eventually offering a facile method for the wireless detection of human physiological signals in the field of electronic fabrics. The complex sensor signal was measured using a gain/phase analyzer in a frequency range between 10Hz and 100kHz. Humidification in textile manufacturing has many benefits that will enhance profitability: Product weight - preventing moisture loss during a textile’s processing and storage can reduce weight loss from a typical 4 to just 0.5. A textile-based humidity sensor using cotton as a hygroscopic material was reported by Pereira, Silva, Carvalho, and Carvalho (2011). Based on the detection of LC wireless testing system, the frequency of 50.25 MHz under the exhaled condition shifts to 50.86 MHz under the inhaled situation of humidity sensor. Moreover, a battery-free LC wireless testing system combined with the yarn-shaped sensor is fabricated, which is further successfully imbedded into the intelligent mask to detect human breath. The response and recovery time of the yarn-shaped humidity sensor is only 3.5 and 4 s, respectively, with little hysteresis, because of the hydrophobic property of these functional fibers and the grooves on the surface of the fibers, which is much faster than those of the commercial polyimide materials. Yarn-shaped humidity sensor is fabricated based on a sensitive fiber with relatively high specific surface area and abnormal cross-section. Textile-based electronic techniques that can in real-time and noncontact detect the respiration rate and respiratory arrest are highly desired for human health monitoring.

Textile humidity sensor