The WSF spectrophotometer is a color measurement instrument with superior performance, wide range of uses and easy operation. It is suitable for measuring the reflection color and transmission color of various objects, and can test the whiteness, chromaticity and color difference of two kinds of objects. The lighting receiving mode of the instrument is d/0 specified by CIE. It can display the reflectance and transmittance of the object in the visible light band (400nm~700nm), and communicate with the computer through the interface to give the spectral curve of the object's reflection color, which greatly facilitates the analysis of the object's color. The instrument can be widely used in textile, dye, printing and dyeing, coating, paint, paper, building materials, food, printing and other industries. The main technical parameters Lighting conditions: d/0 Spectral conditions: The overall response is equivalent to the tristimulus values ​​X, Y, Z under the color matching function of the GB3978 standard illuminator D65, A, C and 10°, 2° field of view. Display mode: character type liquid crystal display Measuring window: Ø20mm Wavelength range: 400nm~700nm Accuracy: ±2(nm) Transmittance accuracy (%): ±1.5 Repeatability: σu (Y) ≤ 0.5, σu (x), σu (y) ≤ 0.003 Stability: ΔY≤0.4 Accuracy: ΔY≤2, Δx, Δy ≤0.02 Color system: Color: X, Y, Z; Y, x, y; L*, a*, b*; L, a, b; L*, u*, v*; L*, c*, h*; Color difference: ΔE (L*a*b*); ΔE (Lab); ΔE (L*u*v*); ΔL*, ΔC*, ΔH*. Whiteness: Gantz Whiteness: Dual linear whiteness recommended by CIE Blue light whiteness: W=B Tabble: recommended by ASTM, W=4B-3G Power supply: AC220V±22V 50Hz±1Hz Instrument size: 475mm×280mm×152mm Net weight of the instrument: 12kg Output communication interface: RS232