The Surface Roughness Tester is an essential tool for accurately measuring the surface profiles of both metal and non-metal surfaces. This device provides key measurement parameters including RA, RZ, RQ, and RT, delivering reliable data for precision evaluation. With a stroke length of 6 mm and various sampling lengths of 0.25, 0.80, and 2.50 mm, it is designed to meet diverse testing requirements. The evaluation lengths available are 1.25, 4.0, and 5.0 mm, ensuring versatility across different applications. The measurement range covers RA and RQ from 0.05 to 15.0 μm, while RZ and RT range from 0.1 to 50 μm, allowing for thorough analysis of surface roughness. The device features an indication error of ±(10NM+0.1A) and an indication variation of less than 6%, offering high accuracy for technical assessments. With a tip radius of 10MM±1MM and a static force input of less than 0.016N, this tester also includes a force change rate of less than 800N/M and sensor guide head pressure of under 0.5N. Included in the packaging are the main roughness tester unit, charger, and instruction manual, making it a comprehensive solution for professionals engaged in surface quality evaluation.