Whiteness Meter
Filter
Showing all 5 results
| 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 |
| Brand | Jihengpin |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | HP-WSB-2Y |
| Price | Upon Request |
| Measurement Range | 0–199 |
| Measured Parameters | Blue Light Whiteness (r₄₅₇), Fluorescent Whitening Value (F) |
| Light Source | LED |
| Illumination/Viewing Geometry | 45/0 (compliant with GB/T 3978) |
| Display | LCD |
| Minimum Resolution | 0.1 |
| Repeatability | ≤0.2 |
| Accuracy | ±1.0 |
| Operating Temperature | 5–35 °C |
| Operating Humidity | ≤85% RH |
| Storage/Transport Conditions | –20–50 °C, ≤90% RH |
| Brand | LICHEN |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Region of Origin | Domestic (China) |
| Model | WSB Series |
| Price Range | USD 170 – 475 |
| Power Supply | WSB-1: 5×AA alkaline batteries (DC 1.5 V) or AC 220 V / 50 Hz |
| WSB-2 | AC 220 V / 50 Hz |
| Display | LCD |
| Whiteness Formula | Blue Light Whiteness WB = R₄₅₇ |
| Measurement Range | 0–199 |
| Aperture Diameter | WSB-1: Φ15 mm |
| WSB-2 | Φ30 mm |
| Zero Drift | ≤0.2 / 10 min |
| Indication Drift | ≤0.3 / 3 min |
| Repeatability Error | WSB-1: ≤0.2 |
| WSB-2 | ≤0.3 |
| Net Weight | WSB-1: 0.4 kg |
| WSB-2 | 2.1 kg |
| Dimensions | WSB-1: 70 × 220 × 75 mm |
| WSB-2 | 260 × 330 × 250 mm |
| Calibration Standard | Certified National White Reference Tile |
| Preheat Time | 30 seconds |
| Compliance | GB/T 2913, GB/T 5950, GB/T 8940.1, GB/T 12097, GB/T 13025.2 |
| Brand | Shengtai Instruments |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Manufacturer |
| Model | ST001D |
| Illuminant | Simulated D65 |
| Geometry | Diffuse/0° (d/0) |
| Integrating Sphere Diameter | 150 mm |
| Measurement Aperture | 30 mm |
| Display | High-resolution LCD with Chinese UI |
| Connectivity | Ethernet (TCP/IP), USB (optional) |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Zero Drift | ≤0.1 |
| Value Drift | ≤0.1 |
| Measurement Error | ≤0.5 |
| Repeatability Error | ≤0.1 |
| Specular Reflection Error | ≤0.1 |
| Sample Size | ≥Φ30 mm, thickness ≤40 mm |
| Dimensions | 360 × 264 × 400 mm |
| Net Weight | 20 kg |
| Compliance | GB/T 22427.6, GB/T 23774, GB/T 3978–2008, GB 7933, GB 7974, ISO 2470, GB 8940.2, GB 1840, GB 2913, GB 13025.2, GB 1543 |
| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | WSB-V |
| Price | USD 700 (FOB) |
| Light Source | Simulated D65 Illuminant |
| Geometry | Diffuse Illumination / Normal Detection (d/0) |
| Sphere Diameter | φ120 mm |
| Aperture Diameter | φ20 mm |
| Sample Minimum Diameter | ≥φ30 mm |
| Repeatability | ≤0.1 |
| Zero Drift | ≤0.1 |
| Scale Drift | ≤0.1 |
| Measurement Error | ≤±0.5 |
| Resolution | 0.1 |
| Display | 3½-digit LED |
| Output | RS-232 interface (printer optional) |
| Compliance | JJG 512–2002, GB/T 3978–1983, GB/T 5950–2002 |