This is an adapter to connect two narcosis filters to a snorkeling mask form Khroom.

A doctor from a local hospital asked me to help him with the design of an adapter to be able to use a snorkeling mask as a protective mask by attaching air filters from a narcosis device to the mask in case the masks in stock at the hospital got exhausted. The result can be seen and downloaded here. The fit of the parts is very nice and we are quite confident it would work quite good, if necessary.

In case it would become necessary to use this, we would definitively reprint it with a water and air tight printing technique (most probably SLS). What you can see in the photos is only a prototype to check the proper dimension of the fittings.

We do not guarantee for anything if you would like to use this adapter. It should definitively only be used, if no other option is available. Use this at your own risk! If you want to use this at least be sure to choose a printing technique that allows water and air tight prints (i.e. SLS, SLA or DLP). FDM printing is not recommended!

There is a blog post about how we designed this thing at https://c3pb.de/category/blog.html#blog/tauchmaskenadapter-als-notfallplan-gegen-covid-19.html (in German).

How I Designed This

We used a 2D scanner (like available in many copy machines) to get the proper dimensions of the connectors by tracing the outlines of the parts.

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