2020 Stable Pressure Version, integrating three methods and five algorithms from the French and Chinese national standards, the electric flux method, NEL method, cement standards, and UHPC standards into one unit. Beijing Naidel Co., Ltd.'s independently developed 2020 Stable Pressure Version Chloride Ion Permeability Tri-Meter, equipped with an independently developed automatic voltage regulation system, can automatically output stable high-precision voltage and achieve high-precision current, ensuring better measurement accuracy of the equipment, with all voltage levels exceeding standard requirements. The 8-inch touch screen has a user-friendly interface, and the test fixtures are made of imported high-purity acrylic materials, colorless and transparent, with strong corrosion resistance. The all-in-one machine with multiple methods has powerful functions, an automatic data acquisition and control system, and measurement accuracy that meets and exceeds national standards, making it an optimal product for quality inspection and scientific research units.