Desk Chair Sensor (IMAGE) Purdue University Caption Researchers embedded temperature sensors on desk chairs to track the occupancy of an office space, finding that as the number of people increase, so do emissions of airborne chemical compounds. Credit Purdue University photo/Erin Easterling Usage Restrictions None License Licensed 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.