The Surfaces Roughness Tester is designed to provide accurate measurements of surface roughness with exceptional precision. Suitable for various applications, this device evaluates parameters such as RA, RZ, RQ, and RT, ensuring thorough analysis of both metal and non-metal surfaces. It features a stroke length of 6 mm and sampling lengths of 0.25 mm, 0.80 mm, and 2.50 mm to accommodate diverse testing needs. The measurement range includes RA and RQ from 0.05 to 15.0 μm, and RZ and RT from 0.1 to 50 μm, allowing for both fine and coarse surface assessments. The instrument boasts an indication error of ±(10NM+0.1A) and an indication variation of less than 6%, ensuring reliability in results. The sensor stylus tip is engineered with a radius of 10 mm ±1 mm, while maintaining a static force of less than 0.016N and a force change rate of under 800N/M. Additionally, the sensor guide head pressure is maintained below 0.5N, optimizing the accuracy of readings. Compact and portable, the Surfaces Roughness Tester is an essential tool for professionals involved in quality control and engineering processes. The packaging includes one roughness tester main unit, one charger, and a comprehensive instruction manual for user guidance.