Senior Airman Ants Vahk (right), 92nd Aerospace Medicine Squadron bioenvironmental engineering journeyman performs a respirator fit test for Staff Sgt. Nathan Gilbert (left), 141st Maintenance Squadron metals technician, Dec. 7, 2016 at Fairchild Air Force Base, Washington. The test is performed by hooking up a respirator to a machine called a Porta Count. One hose connects to the mask and takes account for the atmosphere within the mask, while a second hose takes in a sample from the surrounding environment that is outside the mask. The machines performs a calculation based on how many partic

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Senior Airman Ants Vahk (right), 92nd Aerospace Medicine Squadron bioenvironmental engineering journeyman performs a respirator fit test for Staff Sgt. Nathan Gilbert (left), 141st Maintenance Squadron metals technician, Dec. 7, 2016 at Fairchild Air Force Base, Washington. The test is performed by hooking up a respirator to a machine called a Porta Count. One hose connects to the mask and takes account for the atmosphere within the mask, while a second hose takes in a sample from the surrounding environment that is outside the mask. The machines performs a calculation based on how many particles are outside the mask versus how many are leaking inside the mask and determines if the mask is being effective.

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Photo credit: © Conner Flecks / Alamy / Afripics
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Keywords: airmen, archive, armed, bioenvironmental, biological, chemical, defence, fairchild, fit, forces, gas, mask, military, readiness, reportage, servicemen, test, usa