Our magnets that are used to sense the rotation of plating barrels, are coated in PTFE. Unfortunately the PTFE coating is limited in thickness, and as a result, after several months in service, some pinholes developed – possibly as a result of abrasion of the coating. These breaches in the PTFE coating allowed for some corrosion. Therefore, to solve this problem, we have developed a magnet “puck” that completely encapsulates the magnet. This puck is attached to the plating barrel in the same way as before – with titanium screws. With the “puck” the magnet is completely protected from incidental scrapes and nicks behind a polypropylene guard.
The magnets are so powerful that they are able to exert a force through the polypropylene casing easily. See this video or a demonstration of the magnet force.
For more information on the plating barrel rotation alarms please visit our RA5 page here.