The Paper Tearing Tester is a precision instrument specifically designed for measuring the tearing strength of paper and paperboard, fully complying with ISO 1974 (Paper — Determination of tearing resistance — Elmendorf method) and GB 455.1 standards. It is primarily used for tear testing of paper and is particularly suitable for lower-strength paperboard. The instrument features a mechatronic design with a computer-controlled measurement system based on a high-precision photoelectric shaft encoder and single-chip digital circuit technology. It offers simple human-machine interaction via an LCD display, combining advanced technology, comprehensive functionality, stable performance, and ease of operation. The measuring range is 10-8000 mN, with an optional extension to 16000 mN. The initial tearing angle is 27.5±0.5°, the initial cut length is 20±0.5 mm, and the clamp distance is 2.8±0.3 mm. With overall dimensions of 400×310×580 mm and a weight of approximately 30 kg, it comes with two standard calibration weights. It is an ideal laboratory testing device for the papermaking, packaging, scientific research, and quality inspection industries.