We are evaluating several ways to see what method produces the best water resistance performance. Here are some of the top options under evaluation:
- Using Sonic Welding to bond the outer and inner Polycarbonate, and using conformal coating on the electronics which keeps the PCBA isolated against water. Challenge here will be to have the tolerances optimized so that the welded enclosure itself does not permit water through the seams.
- using the same process as the above, but inserting epoxy or rubber compound into the cavity. Since the cavity would be filled, it inherently prevents water from coming through, but it may be hard to control the flow of the epoxy/rubber material to prevent it from getting onto our HR LED and lens.
- using a potting technique to seal the electronics to the bottom cover. Like the above option, it may be hard to control the flow and avoid interfering with HR LED and lens.
As Chinese New Year has now wrapped up and several of our factory partners have come back to work, we are working with them to optimize the design to make it manufacturable while being as water resistant as possible. We do not have exact results yet for the Vu Pulse waterproof rating, but the product will indeed be water resistant. We will keep you informed regarding the design and share the water resistance results as they become available. Our Goal is to provide a water proof product, but that may not be possible, it may only be possible to provide water resistance that for example would allow you to shower and wash your hands, but not go swimming in a pool.