TO measure tensile strength and breaking elongation of single yarn made of cotton wool, twine, chemical fiber etc, automatically and to print out all test data and statistic results. Controlled by PC, Operate System is Windows, with chinese fomat menu, tensile curve can be displayed by higresolution monitor, tensile and elongation data are displayed on the top of the screen. The propertied should be in conformity with the requirement specified in GB/T3916、GB/T14344.