☆ Zhonggu Flour Inspection Instrument, Flour Whiteness Tester - WSB-VI - Working Principle:
The instrument uses an integrating sphere to measure absolute spectral diffuse reflectance. Its optical principle is to use blue light emitted by a semiconductor light source to directly enter the integrating sphere. After diffuse reflection on the inner wall of the integrating sphere, the blue light illuminates the sample at the testing port. The spectrum reflected from the sample surface is received and converted into an electrical signal by a silicon photovoltaic cell after passing through a condenser, light bar, and color filter group; There is also a silicon photovoltaic cell that receives the substrate signal inside the sphere. The two electrical signals are amplified separately and processed by the microcontroller to achieve the system functions of automatic zero calibration, working whiteboard calibration, and sample testing. Users can easily use this instrument to test the whiteness of various samples. Zhengzhou Zhonggu Flour Whiteness Tester WSB-VI - Related Knowledge: WSB-VI Flour Whiteness Tester-Technical parameters:

1. Diffuse illumination vertical detection method (d/o). This instrument complies with GB3978-83: Standard Illumination Body and Illumination Observation Conditions. It simulates D65 illumination body illumination and adopts d/o illumination observation geometry conditions. The diameter of the diffuser sphere is Ø 120mm and the diameter of the measuring hole is Ø 20mm. It is equipped with a light absorber to eliminate the influence of mirror reflection light on the sample.
2. Illumination light source: semiconductor light source
3. Measurement method: Reflection
4. Repeatability ≤ 0.1
5. Indication drift ≤ 0.1
6. Zero drift ≤ 0.1
7. Indication error ≤ 0.5
8. Measuring hole diameter: Ф20mm
9. Output method: Display with 3 and a half digits, or print the data with a printer (the printer is an optional accessory that users can choose according to their needs)
10. Working environment: temperature (0-40) ℃, relative humidity<80% RH
11. Power supply: AC (220 ± 22) V, 50Hz (0.2A)
12. Dimensions: 220 × 295 × 375mm
13. Weight: 8.5kg