Tylan FC-2902M-T Mass Flow Controller 2900 Series MFC 50 SCCM O2 OEM Refurbished. Model No: 2900 Series. Range/Gas: 50 SCCM, O2. This Tylan FC-2902M-T Mass Flow Controller 2900 Series is refurbished 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.