Fireproof, Self-Powered Sensor (IMAGE) McMaster University Caption McMaster University researchers, working with colleagues from other institutions, led the development of a self-powered, fireproof sensor to track the movements of firefighters and others who work beyond the line of sight in high-risk environments. Credit McMaster University 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.