Temperature Sensors (image) University of Washington Share Print E-Mail Caption Tiny iButton sensors with protective shields are placed high up in the trees at various sites to measure air temperature in the forest. Credit University of Washington Usage Restrictions Photo credit required. 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.