A new surface mounted magnet and switch have had to be mounted a few mm apart because of the design of a particular door & frame. All works fine now, but with time might the strength of the magnetic field decrease, and the distance become a problem?

Allso

but with time might the strength of the magnetic field decrease, and the distance become a problem?

Not normally, are the door or frame metal..?

A new surface mounted magnet and switch have had to be mounted a few mm apart because of the design of a particular door & frame. All works fine now, but with time might the strength of the magnetic field decrease, and the distance become a problem?

30327[/snapback]

The maximum gap for a door contact and magnet according to the manufacturers is 20mm in most cases so a few mm shouldn't cause any problems. As for the magnet losing magnetism, it is unlikely but a new contact with fresh magnet is only a matter of pence and if that's too expensive just re-magnetise the magnet.

The door/frame are uPVC.

They are a lot nearer than 20mm, so looks as if its not an issue.

Thanks

Allso