We are fit2fit Accredited for both Quantitative (Portacount) & Qualitative (Taste Test) face fit testing:
Our testers are trained, competent as per HSE document INDG 479 and accredited for both quantitative (APC portacount) & qualitative (taste test) respirator tests.
We can test all types of tight fitting respiratory protective equipment: Full mask respirators, SCBA, reusable half masks, disposable masks etc.
Both are valid and approved methods for testing and each method has its uses and limitations.
Quantitative can be used to fit test all types of tight-fitting masks including disposable, half and full face masks. Quantitative tests 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 Ambient Particle Counting (APC) device method, a title ascribed to the TSI Portacount.
The Portacount measures the number of ambient particles inside and outside a facepiece and provides a numerical result which is the ratio of the two over a given test period.
Qualitative relies on the wearer’s subjective assessment of face seal leakage. This method during a set of test exercises use the wearer’s sense of taste to detect face seal leakage of a test agent.
Qualitative tests are subject to problems with sensitivity, lack of objectiveness and inability to provide a numerical result.
For these reasons qualitative tests can only be employed for fit testing of filtering face-pieces (disposable masks) and half masks, not full face masks.
Don’t worry if you are not sure of which method you need, our testers are accredited in both methods and they will always use the one that is suited to your needs.