Looking at my Ex-Word PCB again, I think it actually uses a Hall Effect sensor to detect when it's closed; I couldn't find a magnet that mates with it when the

Looking at my Ex-Word PCB again, I think it actually uses a Hall Effect sensor to detect when it's closed; I couldn't find a magnet that mates with it when the device is closed, but the frame is metal so maybe it just detects that? Hall effect sensors for clamshell devices appear to be industry standard (laptops, flip phones, etc.).