Using the most advanced domestic digital circuit and microcomputer control technology, backlit LCD display, the test data is clear and intuitive, which can test both optical rotation and sugar content. It can save three measurement results and calculate the average value. It is equipped with RS232 interface to transmit data to PC. It can measure dark samples. The main technical parameters: Measurement mode: optical rotation Light source: LED + high-precision interference filter Working wavelength: 589nm (sodium D spectrum) Measuring range: ±45° (optical rotation) Minimum reading: 0.001° (optical rotation) Accuracy: ±(0.01＋measurement value×0.05%)° Repeatability (standard deviation δ): ≤0.01° (optical rotation) Test tube: 200mm, 100mm The lowest transmittance of measurable samples: l0% Output communication interface: RS232 Power supply: 220V±22V 50Hz±1 Hz Dimensions: 600mm×320mm×220mm Instrument quality: 28kg Instrument level: 0.05 level