AVAIN LABS® Surface Roughness Tester RT-8100 The AvainLabs® Surface Roughness Tester RT-8100 is a compact and portable instrument designed for accurate measurement and evaluation of surface roughness on metal, machined, fabricated, and industrial components. It measures important surface roughness parameters such as Ra, Rq, Rz, and Rt, making it suitable for quality control, manufacturing inspection, machining applications, and laboratory testing. With a 6 mm stroke length, multiple evaluation and sampling lengths, and a rechargeable 3.7 V Lithium-Ion battery, the RT-8100 provides convenient surface roughness measurement for both workshop and laboratory environments. Key Features Portable Digital Surface Roughness Tester Measures multiple surface roughness parameters including Ra, Rq, Rz, and Rt Wide measurement range for different surface conditions 6 mm stroke length for convenient surface evaluation Multiple evaluation lengths: 1.25 mm and 4.0 mm Multiple sampling lengths: 0.25 mm, 0.80 mm, and 2.50 mm Compact and lightweight design Rechargeable 3.7 V Lithium-Ion battery Suitable for manufacturing, machining, inspection, and laboratory applications Designed for quick and convenient surface finish measurement Technical Specifications Specification Details Model RT-8100 Measurement Range Ra, Rq: 0.05–15.0 µm Measurement Range Rz, Rt: 0.1–50 µm Stroke Length 6 mm Evaluation Length 1.25 mm, 4.0 mm Sampling Length 0.25 mm, 0.80 mm, 2.50 mm Accuracy ±15% Repeatability <12% Tip Arc Radius 10 µm ± 1 µm Angle 90° +5° / −10° Power Supply 3.7 V Lithium-Ion Battery Dimensions 106 × 70 × 24 mm Weight 200 g Applications The AvainLabs® RT-8100 Surface Roughness Tester is suitable for measuring surface finish and roughness in: CNC machining and manufacturing Metal fabrication and engineering Automotive component inspection Machine shops and workshops Precision component manufacturing Quality control departments Surface finish inspection Material testing laboratories Research and educational laboratories Surface Roughness Parameters The RT-8100 measures commonly used surface roughness parameters: Ra: Arithmetic average roughness Rq: Root mean square roughness Rz: Maximum height-related roughness parameter Rt: Total profile height These parameters help evaluate the surface finish and machining quality of manufactured components. Why Choose AvainLabs® RT-8100? The AvainLabs® Surface Roughness Tester RT-8100 combines a compact design, multiple measurement parameters, selectable sampling lengths, and rechargeable battery operation in a lightweight instrument. With its 200 g weight and 106 × 70 × 24 mm dimensions, it is convenient for both on-site inspection and routine laboratory measurements.