Compatible with diverse instruments, DPR-212 ATR (Attenuated Total Reflectance) probe has straight, 30 cm long configuration designed to provide optical transmission of over 20%. Selection of interchangeable ATR materials, such as ZnSe, ZnS, AMTIR-1, and Germanium, provides coverage of full mid-IR fingerprint spectral region while allowing selection of optimum material for given chemical system. Use of metallic internal lightguides provides performance stability and long term reliability.