Several Coriolis manufacturers have greater market share. Few manufacturers have the size range to 12 NPS. I too searched for their web site. Rheonik is a German manufacturer. Several European manufacturers participate in the flow market with similar technology.
As I know MM (Emerson), PF, EH, ABB, Yokogawa and (Foxboro) I might consider Rheonik with a financial verification for an inquiry. In the US MM is the target for comparison.