Can a Honeywell 5800Micra be used in a door?

Yes, the Honeywell 5800Micra wireless recessed window sensor can also be used on a door. The 5800Micra should be installed the same way for both a door and window. The 5800Micra requires a 0.75'' diameter recess in the door frame or door, and it needs to be deep enough to accommodate a flexible 11" antenna. Note that bunching the antenna may cause a decrease in range of the device.