Featuring a compact structure and convenient operation, the portable surface roughness meter allows quality inspectors to perform measurements directly on production lines, workshops, and maintenance sites. It supports efficient process monitoring by providing reliable surface texture data for improving machining performance and product consistency. Widely applied in automotive manufacturing, machinery production, mold processing, and metal fabrication, this surface roughness measurement tool offers a practical solution for modern industrial quality inspection.

Intuitive HD Color Display & Real-Time Feedback

Industrial Connectivity
The digital surface roughness gauge can be widely used in:
| Model | SISCO-SRT-SSR100 |
| Measurement Parameters | Ra, Rz, Rq, Rt |
| Travel Length | 5.6mm |
| Sampling Length | 0.25mm, 0.80mm, 2.50mm |
| Evaluation Length | 1.25mm, 4.0mm |
| Measurement Range | Ra, Rq: 0.05~10.0; Rz, Rt: 0.1~50 |
| Measurement Error | ±10% |
| Indication Variability | <12% |
| Stylus Tip Radius & Angle | Radius: 10μm±1μm; Angle: 90° (+5° ~ -10°) |
| Stylus Static Force & Rate of Change | Static Force: ≤0.016N; Rate of Change: ≤800N/m |
| Guide Head Pressure | ≤0.5N |
| Battery | 1 x AA Battery |
| Operating Environment | Temp: -20℃~40℃; Relative Humidity: <90%, no vibration or corrosive medium around |
| Size | 73*62*28mm |
| Weight | 220g |
Q1: What is a 3.2 RA finish?
A1: 3.2 RA finish refers to a surface roughness measurement where the roughness average (RA) is 3.2 micrometers (µm) or 125 microinches. RA is a common parameter used to quantify the smoothness or texture of a surface, indicating the average deviation of the surface profile from the mean line over a specified length.
3.2 RA finish is often considered a moderately smooth finish and is typically used in various industries where a certain level of surface smoothness is required for functional or aesthetic reasons. This level of roughness can be achieved through different machining processes such as grinding, polishing, or other finishing techniques.
Q2: What is the difference between surface finish and surface roughness?
A2: Surface finish and surface roughness are related but distinct concepts. Surface roughness specifically refers to the fine irregularities on the material's surface, which are a result of the manufacturing process. These irregularities are usually quantified in micrometers (µm) or microinches (µin) using parameters such as Ra (roughness average) and Rz (average maximum height). Surface finish, on the other hand, is a broader term that includes surface roughness, waviness, texture, and flaws. Waviness refers to larger-scale surface deviations, texture indicates the directionality of surface patterns, and flaws include defects such as cracks and scratches. In summary, surface roughness is a part of surface finish, and surface finish provides a comprehensive assessment of surface quality.
Q3: What is SA and SQ in surface roughness?
A3:Â In surface roughness measurement, Sa and Sq are parameters used to quantify three-dimensional surface texture. Sa (Arithmetic Mean Height) represents the arithmetic mean of the absolute values of surface height deviations measured from the mean plane, analogous to the 2D parameter Ra .Sq (Root Mean Square Height), on the other hand, is the root mean square (RMS) value of surface height deviations from the mean plane, akin to the 2D parameters Rq or Rms.
Sa provides a measure of the average height variation on the surface, while Sq emphasizes larger deviations due to squaring and averaging the deviations. These parameters are crucial for comprehensively assessing surface texture and roughness in three dimensions, widely applied in fields such as materials science, manufacturing, and quality control.
Tips: Is the handheld surface roughness meter suitable for different materials?
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