Rubin Thermometer (image) Johannes Gutenberg Universitaet Mainz Share Print E-Mail Caption The molecular ruby in a solid (red) and dissolved (yellow) state can be used for contactless measurement of temperature. Credit photo/©: Sven Otto, JGU Usage Restrictions This image may only be used in connection with the press release "Scientists develop molecular thermometer for contactless measurement using infrared light," issued by Johannes Gutenberg University Mainz on June 14, 2017. Share Print E-Mail 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.