Refurbished Thermo is50 FT-IR spectrometer with advanced gold KBR beamsplitter and PC workstation. OPTIONAL: Thermo Smart NIR Integrating Sphere Accessory Module (p/n 840-172400) (Range: 10000 - 4000cm-1), Thermo iS50 MCT Detector (p/n 840-229200), Thermo CaF2 Near/Mid-IR BeamSplitter (p/n 840-129500), Thermo Solid Substrate Far-IR On-Axis Beamsplitter CTR (p/n 840-129400). Please contact us with complete Nicolet FT-IR (FTIR) spectrometer details.