Turbo-V 1000HT Varian 9699554S020 Turbomolecular Pump Controller eS31 Working. Model No: Turbo-V 1000 HT C. Removed from a KLA-Tencor eS31 E-Beam Wafer Inspection System. This Turbo-V 1000HT Varian 9699554S020 Turbomolecular Pump Controller is used working surplus. 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.