I. Adopting128 * 64 digit dot matrix liquid crystal display, can directly display standard curve and test data that can be stored by the host, and with an optional printer; II. USB data output interface; III. Can establish standard curve directly, and can conduct related test with the standard curve, continuously test and store 200 sets of data, and can store 100 standard curves; IV. Unique optical system, 1200 pieces/ mm grating and imported receiver to ensure its sound performance; V. Automatic wavelength calibration and setting; automatic conversion of the light source, and automatic control of the switching of deuterium and tungsten lamp as well as the time of lamp lighting. VI. Large sample rooms that can accommodate 5-100mm cuvettes of all kinds; VII. Membrane keys, simple and convenient to operate.