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YG902 Chemical Analysis Oven LLY-06E electronic single fiber tensiometer ... LLY-06A electronic single fiber tensiometer ... LLY-06B electronic single fiber tensiometer ... LLY-27 fiber fineness analyzer LLY-06C human hairy itch tester ... Y146 fiber photoelectric length meter Y171 fiber cutter Y172 fiber slicer Y175A cotton fiber airflow meter YG011 type bundle fiber tensiometer YG412BL Raw Cotton Moisture Analyzer
Apparatus for measuring fiber straight length. In the early twentieth century, people measured the length of fiber bundles by hand. In the early 1930s, they began to measure the length by using the bar chart method and the comb method. In the 1950s, manual adjustment detection was used, and soon it was changed to servo motor automatic tracking. In the 1970s, the United States developed a new camera length meter, which can measure the length of cotton and chemical fibers, and the length can be measured to 63 mm. In the 1980s, it has been further developed into a digital display, automatic data processing and printing out relevant length indicators, and the test efficiency has been significantly improved. The Arealometer capacitive wool length meter made in Belgium is equipped with an automatic fiber organization mechanism, which can make the fibers line up into a neat bundle of hairs. When the hair bundles are placed on a plastic film and passed through an electric field, the number average length and weight-weighted average length can be obtained. This instrument is only suitable for wool tops, and the error is large when loosening. In China, the cotton fiber length is mainly measured by a roller-type length measuring instrument. The fibers arranged neatly on one end are placed on the instrument, and the weighted average length and other indicators are obtained after grouping and weighing at a certain distance. Wool fiber length is generally measured using a card length meter. The lengths of the raw silk and the chemical fiber filaments were measured with a yarn frame length measuring instrument with a certain circumference.