Since the beginning of RAECO Rents, the most frequently rented instrument has been the TSI PortaCount quantitative respirator fit testing system. And with those frequent rentals come the two very common questions. What equipment do I need to do a fit test? And what's a Fit Factor?
- Question 1: What equipment do I need to do a fit test?
- Answer: You need (1) the TSI PortaCount fit testing system, (2) your own masks, and (3) mask adapters that connect your individual mask type to the PortaCount.
- To fit test disposable masks, you don’t need any special adapter, just the sample push probes that come with the TSI 8038 kit. You can buy mask adapters from RAECO Rents and keep them for your annual tests. We also have a few of the most popular mask adapters available for rent for $10 per day or $30 per week. Including adapters to fit 3M, Avon, North, Scott, and Survivair masks.
- Question 2: What’s a Fit Factor? And which fit factor “pass value” should I use for my tests?
- Answer: Fit factor is a numeric estimate of the fit of a particular respirator or mask to a specific person. It gives a ratio of the concentration of a substance in ambient air to the concentration that leaks into the respirator or mask during testing. When you’re talking about fit factors and the PortaCount system, it’s the calculation the fit testing system makes during the simulation exercise.
Fit Factor = Concentration of challenge aerosol outside the respirator Aerosol concentration that leaks into the respirator during the test.
- Respirator mask fit testing for Community Emergency Response Teams
- TSI PortaCount Pro respirator fit testers: Quick-start tutorial videos