Our duty and responsibility is to ensure your employees respirators function, fit and feel secure while working effectively. Quantitative mask fit testing is done by using our Accufit 9000 machine, measuring the amount of leakage into the respirator. A hose is inserted into the face piece of the mask being used to collect and deliver the air sample to a device for analysis. This is done to ensure the individual has no ambient air leaking into the mask, exposing the wearer to airborne contaminants.