Quantitative Mask Fit Testing
In addition to qualitative mask fitting techniques, SureHire is proud to offer quantitative mask fit testing. It is a more accurate and precise method of mask fitting when compared to traditional qualitative mask fitting procedures. SureHire fits for Scott, 3M, MSA and North brands of masks.
Mask Fit Testing refers to a professional fit of safety masks, to ensure that the participant is wearing the proper mask size and type of mask for the shape of their face/head. A proper mask fit ensures that the ‘particulates’ in the air, which may be harmful if aspirated, are filtered by the mask properly, and that no leaks occur around the seal of the mask.
Quantitative mask testing produces a numerical measurement of the 'fit factor' of a particular respirator. A particle counting devices (such as a TSI Portacount Plus) measures the concentration of microscopic particles that exist in ambient air to measure the 'fit factor' directly. The measurement is made while the person performs dynamic movements and/or breathing exercises resembling those experienced in the workplace in order to stress the respirator seal. This type of testing can be performed on all types of masks.
Quantitative mask fitting offers several distinct advantages:
- It eliminates the reliance of the tester on the subject's ability, honesty, cooperation and sensitivity when detecting agents. Quantitative testing makes a direct measurement of mask fit factors.
- Results are immediate and deliver either a 'pass' or 'fail'. Results can be maintained electronically or customized in a printed report.
- The particle counting device uses a programmed sequence of steps so that critical components cannot be omitted or performed incorrectly which may invalidate the fit test.
- It can be used to fit test almost all respirators including elastomeric half and full-face masks, PAPRs, SCBA and even disposable regulators.
- It can be used for cilents with their own respirators to help eliminate any hygienic concerns associated with sharing a test mask.
- Full-face masks can be used to their full potential. Qualitative methods limit the use of full-face masks to environments where half masks are allowed because these methods are limited to a half-mask fit factor pass level of 100. Standards from many regulatory agencies throughout the world require a fit factor pass level of 500 or more for full-face masks. The particle counting device can accurately measure 'fit factors' up to 10 000.
- The quantitative mask fitting software complies with many regulatory standards including those from the Canadian Standards Association.
Mask Fit Testing is required annually by the majority of regulatory bodies. However, the Canadian Standards Association does allow for it to occur on a bi-annual basis. SureHire recommends annual mask fitting, in conjunction with spirometry testing to continue to monitor and protect employee lung health.
N95 Mask Fit Testing Note
Because N95 masks only block out 95% of particles, 5% of particles come through the mask. This means that a subjective response from the client would be compromised. Whether the mask fits properly or not, the client, will always be able to taste at least a trace amount of the Bitrex, or other testing agent if a qualitative test is administered. This makes it difficult to ensure that the mask is correctly fit. Although qualitative testing is less time consuming, SureHire does not recommend this method for use with the N95 masks. Recently 2 Canadian Food Agency inspectors in Alberta contracted H1N1, due to improperly fit N95 masks. Quantitative mask fitting reduces instances of improperly fit N95 masks.
N95 Mask Fit Testing
Please contact us to if you would like more information or to set up an appointment to have your employees fit for masks.
