Humidity sensor

Humidity sensor without electronics

ABOUT THE PRODUCT

Company: Sogang University, Korea
Product Phase: Under development
Product Type: Humidity sensor
Patent Name: Applied for patent

INSPIRING STRATEGY

PRODUCT OR PROCESS

"[A] film-type humidity sensor inspired by the photonic crystal structure of the cuticle of Hercules beetle was designed and fabricated. The reflective color of the
fabricated sample changes from blue-green to red with the bandgap shift
of 137 nm when increasing humidity, which could be discriminated by
human eyes...This proposed bioinspired artificial sensor offers alternative sensing
mechanism to quantify the environmental humidity in a simple and effective way."
(Kim et al. 2010)

At 25% humidity, the sensor appears blue-green, but at 98%, it changes to red.

More, source: http://www.asknature.org/product/