Tylan FM-3900MEP Mass Flow Controller MFC 1.5 SLPM N2 2900 Series Working Spare. Model No: 2900 Series. Range/Gas: 1.5 SLPM, N2. This Tylan FM-3900MEP Mass Flow Controller MFC 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.