Ultrafast integrated humidity and temperature sensor based on carbon nanotubes, and a sensor controller system


An integrated, resistive-type temperature and humidity sensor made of Brewer Science's electronics-grade, aqueous carbon nanotube ink and an attendant sensor controller system was demonstrated. The sensor consumes little power and is fully printed and flexible, which allows it to be conformally mounted on any surface. The sensor resolution is ∼1% for relative humidity and <0.5°C for temperature and has a response time of ∼200 ms. The sensor can easily detect moisture and temperature from a human finger. The humidity sensor is highly sensitive to human breathing as well and can be used in multiple medical applications such as real-time monitoring of breathing for patients with sleep apnea. The sensor controller has two decoupled outputs for direct, high-speed measurements of relative humidity and temperature, and it can directly measure absolute humidity. This technology features sensor interchangeability and a wireless readout capability.


Physics, Astronomy, and Materials Science

Document Type

Conference Proceeding


Carbon nanotubes, Response time, Sensor controller, Sensor resolution, Temperature and humidity sensors

Publication Date


Journal Title

Technical Proceedings of the 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014