Quantitative tests can be used to fit test all types of tight-fitting masks including FFP’s (disposable), half and full face masks.
Quantitative tests can give an objective assessment of facial fit and provide a direct numerical result called a Fit Factor.
The most widely-used quantitative method for RPE fit testing is the Particle Counting method, a title ascribed to the TSI Portacount Plus. The Portacount Plus measures the number of ambient particles inside and outside a face piece and proves a numerical result which is the ratio of the two over a given test period. For more details on test exercises and pass levels go to the HSE 282/28 Protocols.
Types of masks that can be tested