ENVO Mask N95 Filter Testing
This video demonstrates some testing that we performed using the Envo N95 filter. We tested the ENVO N95 filter using a custom setup. The filter is held to a ventilator filter housing, which has had its own filter material removed, using rubber bands. The air goes to a four part manifold which allows the air to be measured by the PCE particle counter. We are still working on this part of the set up. The four section manifold allows sampling of the ambient air. The PCE particle counter measures particles as small as 0.3 microns. A micron is 1/1000 of a millimeter.
The one downside to this mask is that the exhalation port is not filtered. If you are an asymptomatic carrier of COVID-19 you can spread the virus with this mask. There is also no voice diaphragm which makes talking somewhat difficult. The mask itself is quite comfortable and the seal is made of nice soft rubber like material. You can solve the problem of the exhalation port by covering it with a surgical mask.
Based on the measurements we made, this mask should work against COVID-19. Nonetheless, this mask was not designed for biologic particles and caution should be used when using this device for this purpose.
This is the link to the mask.
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Here is the link to the NIOSH and CDC website confirming it is a legitimate mask. They are mask 8448.
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This is the website for PCE.
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We use this particle counter from PCE for the testing device.
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These are some videos from the company.
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This is another mask we tested from Honeywell.
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