Thermo Nicolet 6700 FTIR system with transmission accessory. Complete system with FTIR, laptop, transmission accessory and polystyrene standard. Unit has been upgraded from a Nexus 670 to a 6700. This provides faster electronics, USB connection running on a Win 7 platform. The 6700 FTIR series are a research grade FTIR, which are the most versitile on market today, for spectral range, accessories, and applications.