Respirator Fit Testing

Making sure that respirators fit to the wearer's face is essential for the functionality of the respirator. AFT offers options for quantitative and qualitative fit testing.

Qualitative testing uses chemicals such as isoamyl acetate, which smells like bananas; saccharin, which leaves a sweet taste in your mouth; bitrex, which leaves a bitter taste in your mouth; and irritant smoke, which can cause coughing. It is a pass/fail method that does not measure the amount of the chemical, but rather just the wearer's ability to notice it. 

Quantitative fit testing uses a machine to measure the actual amount of leakage into the face piece and does not rely upon your sense of taste, smell, or irritation in order to detect leakage. The three quantitative fit test methods accepted by OSHA are generated aerosol, ambient aerosol, and controlled negative pressure.

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