Would like to use one of these sensors to monitor a bilco door. Being a big piece of steel, I am assuming that the contact sensor will not work. The magnet side would eventually magnetize the door, and probably cause havoc. Looking to see if the original device handler is available so I can flip the open and close states. Found one that was posted but it did not work at all, plus I lost some of the attributes like Activity and coordinates. Does Samsung publish their original device handlers?