No other fit tester can quantitatively fit test all types of respirators— gas masks, SCBAs, respirators, even N95 disposable (filtering-facepiece) respirators. The PortaCount® Pro+ Model 8038 Respirator Fit Tester eliminates the guesswork associated with tedious and error-prone qualitative fit test methods. If the mask requires fit testing, count on the PortaCount Pro+ fit tester to provide the fastest, easiest and best OSHA-accepted fit test method.