If the box has dry contacts, then just about any contact sensor with wires soldered to the reed switch will detect when the contact is closed.
Some contact sensors already have screw terminals for this, so you don't need to solder.
If the box has dry contacts, then just about any contact sensor with wires soldered to the reed switch will detect when the contact is closed.
Some contact sensors already have screw terminals for this, so you don't need to solder.