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These BEKK Smoothness Tester is a new type of test developed by our company according to the specification of international standard. The instrument mainly test the smoothness off the paper or cardboard (by Bekk method).Bekk smoothness: time in seconds which under a defined pressure differential is required to draw a definite quantity of air at atmospheric pressure between the surface of the test piece and a ring-shaped plane surface under specified conditions of contact. The smoothness of a wide range of papers and boards may be measured by this method and it is especially recommended for smooth papers and boards. However , for very smooth samples, measurement times may be impractically long.Application  Paper. paper board .Standards     Meets ISO 5627GB/T 456QB/T 1665Specification1. Power supply: AC220V±10%   50HZ2. Precision0.1s3. Measuring range: 10±0.05cm24. Pressure: 100kpa±2kpa5. Display: English menu and LCD screen6. Printer : thermal printing, high speed and no noise.7. Communication output: standard RS232 interface8. Ambient conditions: temperature 10~30. Relative humidity<85%9. External dimensions: Length × Width × Height 318mm×362mm×518mm  10. Weight: 35kg