The new 2100 series photometer is designed with 5nm accuracy, high quality photodiode detectors and 1200mm diffraction gratings to ensure high performance. Automatic Wavelength Setting, clear digital display and built-in automatic detector for easy operation. The main functions of the 2100 series are absorbency, transmissivity, factor and concentration mode, as well as one-button automatic zero adjustment function. The 2100 series can transmit data through RS-232C interface port, and can choose the optional Windows software to facilitate data collection and application program expansion. Standard curves, kinetics, absorbance, transmittance test data can be easily exported to Microsoft Excel for further processing, analysis, and storage. The software is perfectly compatible with XP, Windows 7, and Windows 8 operating systems. Large capacity sample room can be equipped with a maximum of 100 mm optical path of the colorimetric dishes and a variety of optional accessories.