The Horizontal Tensile Strength Tester is a precision mechanical testing instrument designed and manufactured in accordance with GB/T 12914-2008 (Paper and board — Determination of tensile properties). It is suitable for accurately measuring tensile force, tensile strength, elongation, breaking length, tensile energy absorption (TEA), tensile index, and TEA index of paper, paperboard, and similar materials. It also features wet strength testing capability. The instrument has a measuring range of 0-300 N, with optional 30 N and 50 N ranges specifically designed for low-strength papers like tissue. It offers a resolution of ≤0.1 N and measurement accuracy of ≤1%. The horizontal structure design provides stability, with an adjustable clamp distance of 30-300 mm and digital stepless speed control from 1 to 500 mm/min for both testing and return. Equipped with a large touchscreen with a user-friendly menu, it is driven by an imported motor for quiet and precise operation. A thermal printer directly outputs statistical reports including average, standard deviation, and coefficient of variation. Specialized paper grips with an integrated soaking trough enable automatic wet tensile testing. An RS232 interface (optional) is provided for data communication. This is a standardized instrument for paper mechanical property testing in the papermaking, packaging, hygiene product, and research industries.