TJ270-30A Double-Beam Infrared Spectrophotometer 1.Original place in China;competitive price 2.Double ... kindsFive-speed≤1%T(650-400cm-1)(Transmittance, absorbance, single beam)(very fast, fast, normal, slow, very slow)Slit programResponseWork modelHorizontal ... measuring hydroxyl 9.polymer composition analysis 10.pharmaceutical analysis ...... 11.infrared lens transmittance measurements