I run a small company, Dexter Industries. We started out a few years ago making a few sensors for LEGO MINDSTORMS. Our sensors for the LEGO system are pretty bare-bones: they're mostly all just PCB's. Some have proven popular, but the feedback we get from our customers and distributors is to get some sort of protective casing on them.
I've been experimenting with Laser Cut acrylic, sort of a sandwich model where a supporting base is cut to go around the circuitry, a cover on one end, and the PCB on the other. This seems like a really inexpensive, easy-to-implement casing (plastic blow molding is currently way out of our budget).
The problem I'm having is getting the acrylic to adhere to the PCB. The two acrylic pieces go together great with acrylic cement (pretty obvious I guess). I can't seem to find a good glue to bring the acrylic to the PCB.
Maybe I'm totally barking up the wrong tree to get some protection for the sensors as well; has anyone else had this problem or thought about it?