1. The light transmittance meter adopts the parallel light path of the light source and the light collecting design of the receiver, so that it can measure large thickness materials 2. Equipped with a fixed base, with two measurement methods; that is, it is suitable for testing such as on-site measurement of automobile front glass, and it is also suitable for fixed-point light transmission measurement such as a fixed station in a factory two measurement methods of LS116 light transmittance meter 3. Adopt high-resolution acquisition chip, which can realize high-precision data acquisition, fast response and real-time dynamic calibration, high measurement accuracy and fast test speed. 4. The instrument can measure high-transmittance samples. The transmittance measurement range is 0.001% -99.8%, and the highest resolution can reach 0.001% 5. The sensor detects the incident light intensity of the light source and the light intensity after passing through the measured substance. The ratio of the transmitted light intensity to the incident light intensity is transmitted. Rate, expressed as a percentage