CleanSpace Halo Fit Tester Adaptor (DIY)

thingiverse

When we received our CleanSpace Halo in March for demonstration and trial use, our infection control officer was scratching her head over how to fit test the mask to our front line staff. So I set out to design one purely out of interest. The yellow one is the first generation but the clip-on is too loose. The hole to fit in the exhalation valve is also too small. The surface is very smooth because I used a hospital 3D printer (Ultimaker) with double extruders (1 for the support which dissolves in water). The metal piece shown is the usual sampling connector used in N95 mask fit tests. The white one is the second generation, made using sample PLA filament that came with my first 3D printer. However, the clip-on is still slightly loose. The exhalation valve fits on perfectly. The surface is rough because I printed it with my own 3D printer. Finally, I redesigned the third version (grey one), which clips on tightly (perhaps too tight). So, I widened the diameter again and uploaded this final revised STL version. Just recently noted that CleanSpace Halo has its own fit test adapter. My hospital is going to buy one anyway for HK$1800. I am not sure how it looks like but will post a close-up photo when it arrives. Disclaimer: - Not yet tested on Portacount Fit Test Machine, but will report back later. - Releasing this version since I made it anyway. - Use at your own risk.