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| Product Name | YUEFENG SBDY-2 Portable whiteness Meter | YongLiDa SBDY-II Digital whiteness Meter |
| Product Price | $322.00 | $332.00 |
| Details | Details | |
| Model comparison | ||
| type | handheld | desktop |
| Whiteness | Blue light whiteness | Blue light whiteness |
| Measuring range | 0~100 | 0~200 |
| Sexual repeability | ≤0.2 | ≤0.3 |
| Indication accuracy | 0.1 | 0.1 |
| Measurement aperture | f21 ~ 30mm | |
| Parameter comparison | ||
| Measurement Range | 0~100% | 0-199.9% |
| Precision | 0.1 | |
| Zero drift | 0.1/10min | ≤0.2 |
| repeatability error | 0.2 | |
| power supply | Power Adapter or 6V Battery | |
| Illuminant | Approximate A Illuminant | |
| test condition | 45/0 | 45℃ |
| intrinsic error | 2 | |
| Indication Stability | 0.2/10min | |
| signal output | 0-1V | |
| Environmental humidity | ≤85%RH | |
