Czerny-Turner double-beam optical system with an integrated 12 mm aluminum alloy optical mounting platform ensures long-term data stability. High-precision screw-driven grating ensures wavelength accuracy of < ±0.3 nm; transmittance accuracy reaches ±0.3%T. 10.1-inch large capacitive touchscreen with a navigation-style menu operating system. Built-in specialized programs for photometric measurement, quantitative measurement, qualitative measurement, time measurement, DNA/protein measurement, and multi-wavelength measurement. 32GB large-capacity memory; data output via USB, Email, USB flash drive, and WIFI printing. Original imported deuterium and tungsten lamps ensure a light source lifespan of up to 2 years. Fully sealed optical system design prevents corrosion and deterioration of optical components caused by the external environment. Supports various accessories: 5–100 mm single-slot long-path cell holders, automatic sample holders, peristaltic pump autosamplers, water-bath constant temperature sample holders, Peltier constant temperature sample holders, integrating sphere diffuse reflectance devices, and 5° specular reflectance devices.