Albert Thiel was a pioneer in saltwater aquarium keeping and was one of the first to manufacture and sell reef keeping additives and equipment in the 80's and into the 90's. I may be mistaken but i believe that he has pretty much been out of the business for the better part of a decade. Getting information or parts will likely be difficult. A experienced reefer with good do it yourself skills could probably identify what you have and even make it work. You may be possible to reach Mr Thiel here,
albert@athiel.com