superhydrophobic (IMAGE) Penn State Caption A combination of superhydrophobic materials and Joule heating allows this sensor to stay dry and functional, even in environments with up to 99% humidity, according to Cheng. Credit Larry Cheng group, Hebei University of Technology, Xiangtan University. Usage Restrictions non commercial use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.