Sensor image (IMAGE) Optica Caption A new easy-to-use optical fiber sensor achieves sensitive and real-time detection of extremely low levels of arsenic in water. Credit Sunil Khijwania, Indian Institute of Technology Guwahati Usage Restrictions None 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.