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| Brand | Yidian Woguang (YDWG) |
|---|---|
| Origin | Shanghai, China |
| Model | WSB-2 |
| Measurement Modes | R457 Blue-light Whiteness, Fluorescent Whiteness, Opacity |
| Illumination Geometry | 45/0 and d/0 compliant |
| Spectral Peak | 457 nm ± 2 nm, FWHM: 45 nm |
| Detector | Silicon Photodiode |
| Aperture | 30 mm |
| Range | 0–150 whiteness units |
| Resolution | 0.01 unit |
| Accuracy | ≤ ±1.0 unit |
| Repeatability | ≤ ±0.2 unit |
| Drift Stability | ≤ ±0.1 unit over 30 min |
| Display | 7-inch color capacitive touchscreen |
| Data Storage | 200 test records |
| Interface | USB host for U-disk export |
| Power | 100–240 V AC, 50/60 Hz, 40 W |
| Dimensions | 360 × 228 × 312 mm |
| Net Weight | 4.8 kg |
| Brand | YDWO |
|---|---|
| Origin | Shanghai, China |
| Model | WSB-3 |
| Measurement Modes | R457 Blue-Light Whiteness, Fluorescent Whiteness, Opacity |
| Illumination Geometry | d/0 and 45/0 compliant |
| Spectral Peak | 457 nm ±2 nm, FWHM: 45 nm ±5 nm |
| Detector | Silicon Photodiode |
| Aperture | 20 mm |
| Range | 0–150 WHITENESS UNITS |
| Resolution | 0.01 unit |
| Accuracy | ±1.0 units |
| Repeatability | ≤0.2 units |
| Stability (8-hr drift) | ≤0.1 units |
| Display | 7-inch color capacitive touchscreen |
| Data Storage | 200 test records |
| Interface | USB host for U-disk export |
| Power | 100–240 VAC, 50/60 Hz, 40 W |
| Dimensions (W×D×H) | 360 × 228 × 312 mm |
| Net Weight | 4.8 kg |
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