An Affordable Nerve-Gas Detector (IMAGE) University of Texas at Austin Caption Made from Lego bricks and a smart phone, a device is connected to free software and utilizes the phone's camera to identify and detect nerve agents, like VX and sarin. Credit University of Texas at Austin Usage Restrictions With credit 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.