I am trying to source some door contacts which work the opposite to standard ones being tht the reed is normally closed but goes open when magnet is applied. It is for some door monitoring on a nurse call system

I`ve got some in the van, i`ll try and find out where they came from.

Door Shut = OPEN Contact

Door Open = CLOSED Contact

I assume that`s what your after..

Either that or use the contact to switch the feed to a mini relay!

I have used 3 position dc before alough only in surface form they have NO NC C also tapmer term. I think they came from RS Gardiners and A+A are usless for anything odd like this.

Im sure we used to get surface reed switches which go cc when the magnet is removed from RS Components when I used to fit alarms to vans. We used to use them on the back roller shutter.

We had some only weeks ago for a similar situation.

Supplier was gardiner security

Sam

Were they the big old reeds of days gone by or have they been modernised?

Supplier was gardiner security

Yeah that`s where I`m told our`s were from too.

Were they the big old reeds of days gone by or have they been modernised?

You can still get them, but not many customers want them, they all think smaller is better.

The ones we ordered weeks ago were identical in size/shape as the usual ones, so had to hide them from the managing director so they didn't get mixed up.....

I can still hear the "plink" as the reed is pulled over.

Everything has to be smaller these days, except for my beer gut thankfully!