2021-10-132021-10-132021-05-12http://hdl.handle.net/10919/105318Close up of Occupational Health Dynamics FitTester 3000.Dimensions: 1500 x 1200Size: 324 KBimage/jpgenCreative Commons Attribution-NonCommercial 4.0 InternationalPPERespirator quantitative fit test deviceImageVirginia Tech