The Digital Board Thickness Tester is a new-generation mechatronic inspection instrument developed according to national standards, incorporating modern mechanical design principles and ergonomic guidelines. Equipped with a high-precision displacement sensor and a touchscreen operating system, it offers comprehensive functions including testing, unit conversion, data display, memory storage, printing, and data processing. The measuring range is 0-18 mm with a resolution of 0.01 mm, indication deviation of ±0.05%, and measurement repeatability of 2.5 μm or 0.5%. The measuring pressure is 20±0.5 kPa, contact area is 1000±20 mm², and descent speed is ≤3 mm/s. A built-in modular thermal printer supports one-touch testing and automatic data processing. The instrument complies with QB/T 1035, QB/T 451.3, QB/T 1055, ISO 534, and ISO 438 standards, making it an ideal board thickness testing device for the papermaking, packaging, research, and quality supervision industries.