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| Brand | 3nh |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | NR4520 |
| Illumination Geometry | 45/0 (45° incident / 0° viewing) |
| Compliance | CIE No. 15, GB/T 3978, ISO 2470-1, ASTM E313, CIE 1964 10° Standard Observer |
| Light Source | D65-simulating LED |
| Detector | Silicon photodiode with D65-weighted spectral response |
| Measurement Aperture | Φ20 mm (optional Φ10 mm) |
| Repeatability | ΔR ≤ 0.1 (after warm-up & calibration, 30 measurements on white tile at 5 s intervals) |
| Inter-instrument Agreement | ΔR ≤ 0.5 (BCRA Series II 12-tile average) |
| Measurement Time | 1.5 s |
| Display | 2.8″ TFT true-color LCD (16:9) |
| Data Storage | 100 standards + 5,000 samples |
| Power | Rechargeable Li-ion 3.7 V @ 3200 mAh |
| Operating Temperature | 0–40 °C |
| Storage Temperature | −20–50 °C |
| Dimensions | 205 × 67 × 80 mm |
| Weight | 400 g |
| LED Lifetime | >1.6 million measurements or ≥5 years |
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