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| Product Name | RunJie RJJD220 Portable Roughness Gauge | LANDTEK Roughness Gauge |
| Product Price | $1145.00 | In coming |
| Details | Details | |
| Model comparison | ||
| Principle | Contact | Contact |
| Instrument Type | Handheld | Handheld |
| Display Type | Digital | Digital |
| Measurement Function | Surface Roughness | Surface Roughness |
| Measurement parameters | Ra Rz Rq Rt | Ra Rz Rq Rt |
| Test object | General workpiece | General workpiece |
| Measuring Range | 5-50μm | >50μm |
| Accuracy | ±15% | ±10% |
| Sampling Length | 2.5mm | Multi-range |
| Sensor Configuration | Standard | Standard |
| Applicable Workpiece | Flat Surface/Shaft Groove/Slot | Flat Surface/Shaft |
| Parameter comparison | ||
| Measurement parameter | Ra、Rz、Rq、Rt µm | Ra、Rz、Rq、Rt |
| stroke length | 6mm | |
| Sampling length | 0.25，0.80，2.50mm | |
| evaluation length | 1.25，4.0mm | |
| Measurement Range | Ra：0.05 ~ 10.0 µm；Rz：0.1 ~ 50 µm | |
| Indication Error | ±15% | |
| Indication variability | ＜12% | Not more than 6% |
| Sensor stylus tip arc radius | 10 µm±1 µm | |
| Sensor stylus tip angle | 90° | |
| Sensor stylus static force | ≤ 0.016 N | |
| Sensor stylus force change rate | ≤ 800 N/m | |
| Sensor guide pressure | ≤ 0.5 N | |
| Battery | 3.7V lithium-ion battery | |
| Dimension | 106 *70 *24mm | 140 * 52 * 48mm |
| weight | 200 g | 420 g |
| Operating environmental conditions | Temperature: -20℃~ 40℃; relative humidity: < 90% no vibration around, no corrosion medium | |
