Vandagraph is co-owned by Jean & John Lamb, who are still directors and active divers. Both are BS-AC advanced divers, Advanced Nitrox divers, Novice cave divers and re-breather divers. Having been involved with their medical company of over 30 years Oxygen monitoring became a obvious product to transfer to diving.
Here we have their Tek Ox Analyser
We have other dive computer accessories from other manufacturers