LC-WSB-2 Whiteness Meter, 0-199.0 R457 Range and 30 mm Aperture (CAT#: STEM-BC-4143-ZJF)

The LC-WSB-2 is a benchtop whiteness meter for measuring white and near-white surfaces. It determines blue-light whiteness according to the R457 reflectance method. The instrument uses 45/0 illumination and observation geometry for standardized surface evaluation. Its 30 mm measurement aperture accommodates larger sample areas. A high-definition LCD displays measurement values clearly. The movable sample platform and optimized holder reduce light leakage around the test opening. Low-drift precision circuitry and an efficient long-life light source support extended stable operation. Calibration is performed with a nationally standardized white reference plate. The instrument is suitable for routine laboratory, production, and quality-control testing under the listed national standards.

Power supply: AC 220 V, 50 Hz
Display: LCD
Whiteness formula: Blue-light whiteness WB = R457
Measurement range: 0-199.0
Measurement aperture: 30 mm
Illumination and observation geometry: 45/0
Zero drift: ≤0.1 per 10 min
Indication drift: ≤0.3 per 3 min
Measurement repeatability: ≤0.3
Calibration reference: Nationally calibrated white standard plate
Applicable standards: JJG 512, GB/T 5950, GB/T 3977, GB/T 3978, GB/T 3979, and JB/T 9327
Net weight: 3.75 kg
Product dimensions: 320 × 260 × 260 mm

Large thirty-millimeter aperture
Stable benchtop operation
Direct R457 whiteness readout
High-definition LCD
Low-drift measurement electronics
Long-life illumination source
Light-leak-resistant platform
National-standard calibration

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