HY0331D Electronic Yarn Twist Tester is used to determine the twist of single yarns, plied yarns and other yarns by conventional or untwist/re-twist methods. This instrument complies with the following international and industry standards. GB/T: GB/T 1103. It consists of a main machine, a sampling device, software and accessories. The main machine adopts microcomputer control and LCD display. It connects with a computer, and professional software collects and analyzes test data, which is stable and reliable. Technical Specification Model: HY0730 Fiber Fibrograph Testing Equipment Length: range 18~50mm Error of upper half mean length ±0.5mm Error of uniformity index ±1.5% Power supply: AC220V±10%, 50Hz Dimensions: 500mm×240mm×180mm