The method
The Portacount counts ambient air particles.
A sample line draws air from inside the mask, a second line samples the ambient air, and the instrument compares the two particle counts. The ratio is the fit factor. If your requirements are smaller than our half day rate, we can provide a bespoke quotation depending upon travel and numbers.
Half Day Rate
Up to 8 tests/persons
Full Day Rate
Up to 16 tests/persons
7 exercises
HSE INDG479 protocol
~25 min
Per wearer, per mask
Suitable for
- FFP3 disposable respirators
- Half-mask respirators (reusable)
- Full-face respirators
Candidate must
- Be clean shaven in area of the seal
- Not have smoked, vaped, eaten, chewed gum in last 30 mins.
- Not have drunk anything except water in last 30 mins.