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| Product Name | QiWei WSB-1Y Whiteness Meter (Portable fluorescence) | 3NH NR4520 whiteness Analyzer |
| Product Price | $388.00 | $790.00 |
| Details | Details | |
| Model comparison | ||
| type | handheld | handheld |
| Whiteness | Blue light whiteness Fluorescent whitening amount | Fluorescent whitening amount |
| Measuring range | 0~200 | |
| Sexual repeability | ≤0.3 | |
| Indication accuracy | 0.1 | |
| Measurement aperture | f11 ~ 20mm | |
| Parameter comparison | ||
| Measurement Range | 0~199.9 | |
| Whiteness formula | R457 Blue light whiteness, fluorescent whiteness F | |
| Illuminant | LED Illuminant | LED Illuminant |
| test condition | 45/0 | |
| Display mode | LCD liquid crystal display | |
| Measurement aperture | Φ15mm | |
| resolution | 0.1 | |
| Zero drift | ≤0.2/10min | |
| Indication drift | ≤0.3/3min | |
| Repeatability | ≤0.3 | Delta R0.1 (after instrument preheating correction, the average value of 30 whiteboard measurements at intervals of 5s) |
| Operating temperature | 5~35℃ | |
| relative humidity | ≤85%RH | |
| Power supply | AC/DC dual-use | |
| Encasement | Portable Aluminum Encasement Box | |
| Net weight | 1.5kg | |
