[dwb]

Here's a couple of suggestions:-

Try LDT for either ready to use or a kit. Use this link to get direct to the English page of their website.

Or join MERG (website here) and buy their section detector kit.

I think both of these work on a current detecting principle, so are suitable for DCC only.

David
(MERG member but I haven't tried this kit yet)

 

[dwb]

QUOTE there is very little info on the MERG board, I assume that I have to join to learn more.

Well, they can't give away all their secrets

From what you've said, I think you would gain something from membership. If you don't want to take a "punt" on a year's subscription, you could visit the MERG stand at a show and talk to them the pros and cons of joining though it looks like Warley in December is the next chance to do so.

David