Product is obsolete. It has been replaced with the FX51D version of the 4 Prop Match Kit. The prop functionality is the same and is easier to use and more flexible. The videos below are still illustrative of the capability.
Prop kit to detect the placement of 4 objects. In many cases, this kit can replace more sophisticated RFID detection systems. This system works great when the prop placements have some registration to the surface they sit on.
Alternatively, it can be used in a chess puzzle to simply detect the placement of any 4 magnets (attached to chess pieces).
Full datasheet and getting started guide
Reed Switch Replacement - AEI FX50 - Escape Game Prop Controller
Transworld Demo of FX51-A