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| Product Name | QiWei WSB-1 Whiteness Meter (Portable) | QiWei WSB-1Y Whiteness Meter (Portable fluorescence) |
| Product Price | $233.00 | $393.00 |
| Details | Details | |
| Model comparison | ||
| type | handheld | handheld |
| Whiteness | Blue light whiteness | Blue light whiteness Fluorescent whitening amount |
| Measuring range | 0~200 | 0~200 |
| Sexual repeability | ≤0.3 | ≤0.3 |
| Indication accuracy | 0.1 | 0.1 |
| Measurement aperture | f11 ~ 20mm | f11 ~ 20mm |
| Parameter comparison | ||
| Measurement Range | 0~199.9 | 0~199.9 |
| Whiteness formula | R457 blue light whiteness | R457 Blue light whiteness, fluorescent whiteness F |
| Illuminant | LED Illuminant | LED Illuminant |
| test condition | 45/0 | 45/0 |
| Display mode | LCD liquid crystal display | LCD liquid crystal display |
| Measurement aperture | Φ15mm | Φ15mm |
| resolution | 0.1 | 0.1 |
| Zero drift | ≤0.2/10min | ≤0.2/10min |
| Indication drift | ≤0.3/3min | ≤0.3/3min |
| Repeatability | ≤0.3 | ≤0.3 |
| Operating temperature | 5~35℃ | 5~35℃ |
| relative humidity | ≤85%RH | ≤85%RH |
| Power supply | AC/DC dual-use | AC/DC dual-use |
| Encasement | Portable Aluminum Encasement Box | Portable Aluminum Encasement Box |
| Net weight | 1.5kg | 1.5kg |
