No idea if it works as not yet got nodes and controller set up. There seem to be many variants of the G4 meter, the Elster version (branded by local supplier) I have uses this type http://store.meterprovida.com/store/category/28/product/metur002.aspx
This meter has a rebate into which the reed ...

If you are still trying to resolve this issue, check out MeterProvida in the UK who among other things supply Elster heads.
I have no connection with the company but sourced my V200 and an Elster Gas Meter pulser from them well over a month ago, probably lowest prices I found.
I have an outstanding ...