Whiteness Meter
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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 |
| Brand | Drick |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | DRK-4520 |
| Price | USD 630 (FOB Qingdao, ex-factory basis) |
| Brand | Drick |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | DRK 103 |
| Illuminant | Simulated D65 |
| Geometry | Diffuse/0° (d/0) |
| Sphere Diameter | 150 mm |
| Aperture | 25 mm |
| Repeatability | δ(Y₁₀) < 0.1, δ(X₁₀,Y₁₀) < 0.001 |
| Accuracy | ΔY₁₀ < 1.0, ΔX₁₀/ΔY₁₀ < 0.01 |
| Sample Size | ≥Φ30 mm, ≤40 mm thick |
| CIE Systems | CIE 1964 Supplementary Observer (10°), CIE 1976 L*a*b* color space, CIE XYZ tristimulus values |
| Measurable Indices | Whiteness (ISO R₄₅₇, Ganz W₁₀, TW₁₀), Yellowness Index (YI), Opacity (OP), Transparency, Scattering Coefficient (S), Absorption Coefficient (A), Ink Absorption Value, ΔE*ab, ΔL*, ΔC*ab, ΔH*ab, h*ab, λd, Pe, Hunter L,a,b |
| Data Storage | Up to 10 reference samples |
| Interface | Built-in thermal printer, digital display |
| Power | 170–250 V, 50 Hz, 0.3 A |
| Operating Environment | 10–30 °C, RH ≤85% |
| Dimensions | 300 × 380 × 400 mm |
| Weight | 15 kg |
| Brand | Drick |
|---|---|
| Model | DRK103A |
| Measurement Principle | d/0 (diffuse illumination / 0° viewing) geometry per ISO 2469 & GB/T 7974 |
| Illuminant | Simulated D65 |
| Spectral Peak | 457 nm (R₄₅₇), FWHM: 44 nm |
| Color Space | CIE 1964 Supplementary Observer (10°), CIE 1976 L*a*b* |
| Integrating Sphere Diameter | Φ150 mm |
| Aperture Options | Φ30 mm and Φ19 mm |
| Mirror Reflection Compensation | Integrated light absorber |
| Zero Drift | ≤0.1% |
| Indication Drift | ≤0.1% |
| Accuracy Error | ≤0.5% |
| Repeatability | ≤0.1% |
| Specular Reflection Error | ≤0.1% |
| Sample Thickness Limit | ≤40 mm |
| Power Supply | AC 220 V ±5%, 50 Hz, 0.4 A |
| Operating Environment | 0–40 °C, RH <85% |
| Dimensions (W×D×H) | 310×380×400 mm |
| Weight | 16 kg |
| Compliance | GB/T 7974, GB/T 7973, GB/T 1543, GB/T 2409, GB/T 2913, ISO 2470, ISO 2471, ISO 2469, GB/T 10336, GB/T 5950, GB/T 13025.2, GB/T 8904.2 |
| Origin | Switzerland |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Elrepho 070 |
| Pricing | Upon Request |
| Brand | GBPI |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | WSB-L |
| Price | Upon Request |
| Measurement Range | 0–120% |
| Resolution | 0.1% |
| Illumination Geometry | 45°/0° |
| Peak Wavelength | 457 nm |
| Detector | Silicon Photodiode |
| Stability | ±0.2% |
| Repeatability | 0.3% |
| Accuracy (Indication Error) | ±1.5% |
| Compliance Standards | GB/T 5950, GB/T 2931, GB/T 8940.1 |
| 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 | KETT |
|---|---|
| Origin | Japan |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | C-130 |
| Pricing | Upon Request |
| Measurement Principle | Reflectance-based whiteness determination using blue LED illumination |
| Sample Type | Dry powdered materials (e.g., starch, flour, sugar, pharmaceutical powders, cement) |
| Measurement Range | 5.0–120.0 (whiteness index, scale-dependent on CIE/ISO/JIS reference conditions) |
| Sample Mass | ~5.5 g (for starch |
| Display | Digital fluorescent display, resolution 0.1 unit |
| Light Source | High-stability blue LED (λ ≈ 457 nm), compliant with ISO 2470-1 and JIS Z 8722 requirements for whiteness measurement |
| Calibration & Adjustment | Auto-sensitivity notification triggered by verification against included certified white standard tile |
| Data Handling | User-defined calibration curves, averaging function (up to 10 measurements), optional printer output via RS-232 interface |
| Power Supply | AC 100–120 V / 220–240 V, 50/60 Hz |
| Power Consumption | ≤16 W (typical operation: 4 W) |
| Dimensions | 375(W) × 220(D) × 250(H) mm |
| Weight | 7.0 kg |
| Brand | Konica Minolta |
|---|---|
| Origin | Japan |
| Model | CR-14 |
| Illumination/Reception Geometry | 8°/diffuse (excluding specular component) |
| Aperture Size | Ø8 mm |
| Whiteness Indices | CIE Whiteness, Hunter Whiteness, ASTM E313 Whiteness |
| Yellowness Indices | ASTM E313, ASTM D1925 |
| Color Space Display | CIE Yxy (1931) |
| Repeatability (Std. Dev.) | ≤0.5 (CIE Whiteness), ≤0.1 (Hunter Whiteness) on white calibration tile |
| Measurement Interval | ~1 s |
| Power Supply | 4 × AA alkaline batteries (2000 measurements at 10-s intervals) or optional AC adapter AC-A308 |
| Operating Environment | 0–40 °C, ≤80% RH (non-condensing at ≤35 °C) |
| Standard Accessories | CR-A74 White Calibration Tile, CR-A68 Soft Carrying Case, CR-A79 Protective Cap, CR-73 Wrist Strap, 4 × AA batteries |
| 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 |
| Origin | Japan |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported Instrument |
| Model | PF-10 |
| Price Range | USD 1,400 – 4,200 |
| Measurement Principle | Diffuse Illumination / 0° Viewing (d/0°) |
| Spectral Range | 400–700 nm (10 nm intervals) |
| Aperture | Ø30 mm |
| Compliance | JIS P 8148 (Type B), ISO 2469, ISO 2470, ISO 2471, TAPPI T525 |
| Colorimetric Systems | CIE XYZ, CIELAB (L*a*b*), CIELCH°, Yxy, HVC, YI, WH, WB, BR, ΔE*ab, ΔE00, ΔL*a*b*, ΔLCH°, ΔYI, ΔWH, ΔWB, ΔBR |
| Fluorescence Compensation | Dual-filter selectable mode (UV-included / UV-excluded) |
| Repeatability | ΔE*ab ≤ 0.02 (using STFI fluorescent reference paper and white calibration tile) |
| Dimensions | 370 × 450 × 410 mm (W × D × H) |
| Weight | 25 kg |
| Power Supply | AC 100–240 V, 50/60 Hz |
| Lamp | Pulsed Xenon Flash Lamp |
| Optional Accessories | Windows-compatible color management software, RS-232C interface cable, calibration verification kits |
| 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 | Manufacturer |
| Country of Origin | Domestic (China) |
| Model | WSB-V |
| Price | USD 700 (approx.) |
| 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 |
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | WSB |
| Pricing | Available Upon Request |
| Measurement Range | 0–100 |
| Display Resolution | 0.1 |
| Illumination/Viewing Geometry | 45/0 |
| Light Source | 12 V / 30 W Tungsten-Halogen Lamp |
| Whiteness Formula | Blue-Reflectance Whiteness (WB = R₄₅₇) |
| Aperture Diameter | Φ30 mm |
| Measurement Accuracy | ±2.5 |
| Zero Drift | ≤0.3 per 10 min |
| Stability | ≤0.5 per 10 min |
| Repeatability | ≤0.5 |
| Operating Temperature | +5 °C to +35 °C |
| Relative Humidity | <85 % RH |
| Power Supply | 220 V ±10 %, 50 Hz ±1 Hz |
| Power Consumption | <30 W |
| Weight | 7 kg |
| Dimensions | 340 × 270 × 280 mm |
| Calibration Standard | NMI-traceable Certified White Tile (GB-compliant) |
| Brand | YDWO |
|---|---|
| Origin | Shanghai, China |
| Model | WSB-3 |
| Measurement Modes | R457 Blue-Light Whiteness, Fluorescent Whiteness, Opacity |
| Illumination Geometry | d/0 and 45/0 compliant |
| Spectral Peak | 457 nm ±2 nm, FWHM: 45 nm ±5 nm |
| Detector | Silicon Photodiode |
| Aperture | 20 mm |
| Range | 0–150 WHITENESS UNITS |
| Resolution | 0.01 unit |
| Accuracy | ±1.0 units |
| Repeatability | ≤0.2 units |
| Stability (8-hr drift) | ≤0.1 units |
| Display | 7-inch color capacitive touchscreen |
| Data Storage | 200 test records |
| Interface | USB host for U-disk export |
| Power | 100–240 VAC, 50/60 Hz, 40 W |
| Dimensions (W×D×H) | 360 × 228 × 312 mm |
| Net Weight | 4.8 kg |
| Brand | Yidian Woguang (YDWG) |
|---|---|
| Origin | Shanghai, China |
| Model | WSB-2 |
| Measurement Modes | R457 Blue-light Whiteness, Fluorescent Whiteness, Opacity |
| Illumination Geometry | 45/0 and d/0 compliant |
| Spectral Peak | 457 nm ± 2 nm, FWHM: 45 nm |
| Detector | Silicon Photodiode |
| Aperture | 30 mm |
| Range | 0–150 whiteness units |
| Resolution | 0.01 unit |
| Accuracy | ≤ ±1.0 unit |
| Repeatability | ≤ ±0.2 unit |
| Drift Stability | ≤ ±0.1 unit over 30 min |
| Display | 7-inch color capacitive touchscreen |
| Data Storage | 200 test records |
| Interface | USB host for U-disk export |
| Power | 100–240 V AC, 50/60 Hz, 40 W |
| Dimensions | 360 × 228 × 312 mm |
| Net Weight | 4.8 kg |