Bitrex Test solution 2.5ml

Qualitative Fit Testing (QLFT) requires the use of equipment specified in BS ISO 16975-3 and relies on a wearer''s taste response to a bitter or sweet tasting test solution to determine whether or not a facepiece provides an adequate fit. If QLFT is carried out correctly then any test solution detected by the wearer can be assumed to have come from face seal leakage, indicating a poor fit.