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Army scientists demonstrate rapid detection of nerve agents
September 4, 2012
By Battlefield Environmental Division, ARL
![Army scientists demonstrate rapid detection of nerve agents](https://webarchive.library.unt.edu/web/20120926120630im_/http://usarmy.vo.llnwd.net/e2/c/images/2012/09/04/262707/size0.jpg)
Photo Credit: Battlefield Environmental Division, ARL
U.S. Army Research Laboratory scientists use a flow-through hollow cylindrical cell, like a straw, to propagate gases. This cylindrical cell holds the gas being sampled and contains microphones that can listen for the characteristic signal when light is applied to the sample.