Use to conduct quantitative fit testing (QNFT) on 3M™ Reusable Respirators with certain sampling instruments, such as a TSI® PortaCount® Respirator Fit Tester
Designed to be used with the 3M™ Half Facepieces 6000, 6500/6500QL and 7500 Series, and Full Facepieces 6000, FF-400 and 7800 Series.
Quantitative fit testing is required to obtain an OSHA assigned protection factor (APF) of 50 for full facepieces in negative-pressure air-purifying mode