Zerodis Wired Metal Door Window Magnetic Contact Sensor Detector Switch Alarm Home Garage Security Kit

Did the job . Very happy.

Seems to be decent enough. Switch operates from a good distance which allows for some play on whatever is being protected. Time will tell regarding longevity.

worked well in testing, but would not work when attached to a stainless steel structure. Clearly the structure did not allow the magnetic field strength to activate the switch.

Works just fine though a longer cable would have been nice

This does not work!!

I bought this switch for a garage door alarm.It doesn't actually state if this is a normally open or normally closed in the description, but from the questions/reviews it appeared to be N.C. which is what I required.When testing before fitting I discovered that it is actually a N.O. 😖Appears to be no marking on the label stating which varient it is either.It's a shame as on testing it seems to work really well, with a good range, just opposite to what I need...

The description although accurate is incomplete in that it fails to say it is a normally closed switch. This is not what I wanted so had to return it. This was disappointing as it is a nice looking switch with a robust sensing distance that would make installation simple and less fiddly than alternative micro switches