Introduction: The instrument uses a high-precision vacuum sensor to measure the vacuum degree of the vacuum vessel, which replaced the mercury manometer, so this instrument is mercury-free smoothness meter. The instrument adopts the vacuum pump imported from Germany to vacuumize the vacuum container and can reach the required degree of vacuum in a very short time and controlled by the single chip microcomputer. The instrument also has a powerful data processing capabilities: not only able to measure the smoothness of a single sample and automatically stored, but also statistics of the same group of multiple samples of the experimental data, the statistics can be the same set of the maximum sample size, The minimum, average, standard deviation, and coefficient of variation are stored in data memory and displayed on the screen. Technical Parameters: 1. Test area: 10 ± 0.05cm2. 2. Pressure: 100kPa ± 2kPa. 3. Measuring range: 0-9999 seconds 4. Large vacuum container: volume of 380 ± 1mL. 5. Small vacuum container: volume of 38 ± 1mL. 6. Measuring gear selection
