Monday, June 1, 2020
ETRI Develops a High Sensitivity Humidity Sensor
Applicable to Untact Buttons
ETRI Develops a High Sensitivity Humidity Sensor
  • By Kim Eun-jin
  • May 14, 2020, 10:30
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A computer graphic video shows how a non-contact sensor for elevator buttons detects moisture.

A team of Korean researchers has developed a sensor that works by sensing humidity at a distance of one centimeter. This sensor allows people to open doors or elevators without pressing buttons. The sensor is expected to contribute to preventing the spread of the novel coronavirus as social distancing is important in daily life these days.


The Electronics and Telecommunications Research Institute (ETRI) announced on May 13 that its research team, led by Dr. Choi Choon-ki at the Creative ICT Research Institute, has developed humidity sensor technology that can detect moisture such as skin sweat or tidal volume with high sensitivity.

Choi said a patent application has been filed for the technology, which is expected to be commercialized within two years.

The sensitivity of the humidity sensor is more than 66,000 percent, the world's highest. It is more than 660 times higher than that of the sensors currently available. The detection time is 0.5 second, which is up to 12 times faster than conventional commercial sensors that take five to six seconds. It can be used in developing a patch-type sensor with multiple sensors connected together, and is compatible with both hard silicon and flexible devices.