When OSHA requires a fit test
- Before an employee first uses a tight-fitting respirator
- At least once a year after that
- When they switch to a different respirator make, model, style or size
- When a change like significant weight change or dental work could affect the seal
Quantitative testing with a PortaCount
A quantitative fit test measures how well the respirator seals instead of relying on whether the employee can taste or smell a test agent. The PortaCount compares particles inside and outside the mask through a series of exercises and reports a fit factor. Under OSHA, a half-mask passes at a fit factor of 100 or more and a full-face respirator at 500 or more.
What your crew needs to bring
- Medical clearance. OSHA requires a medical evaluation before the fit test. The fit test doesn't replace it.
- Their own respirator in the make, model and size they will use on the job.
- A clean shave where the mask seals. Facial hair under the seal means the test can't be done.
- No smoking, eating or drinking anything but water for 30 minutes before the test.
Scheduling
Fit testing is booked ahead. Tell us how many employees, which respirators, and when your crew is available. Early mornings before shift are common. Fit tests can be combined with a random testing day or pre-employment collections in the same visit.
Records
Each employee gets a fit test record with the respirator tested, the fit factor and the date, organized for your OSHA respiratory protection file.
Questions
How long does a quantitative fit test take?
A single respirator usually takes about 15 to 20 minutes per person including setup, depending on the mask and the protocol.
Can you fit test N95 respirators?
Yes. We fit test N95 filtering facepieces as well as half-mask and full-face elastomeric respirators.
Do you do the medical evaluation?
No. The OSHA medical evaluation is a separate step done by a physician or licensed health care professional before the fit test.