Turbo-V 550 Varian 9699444S012 Turbomolecular Pump Controller Tested Working. Model No: Turbo-V 550 C. This Turbo-V 550 Varian 9699444S012 Turbomolecular Pump Controller is used working surplus. It was tested in our facility and is fully functional. Only items pictured are included: If a part is not pictured, or mentioned above, then it is not included in the sale. Pictured test equipment is not included or available for sale. For items with multiple quantities: The pictured item is not necessarily the one that will be sent. Serial numbers or country of manufacture may vary.