LC-WSB-1 Whiteness Meter, 0-199.0 R457 Range and 15 mm Aperture (CAT#: STEM-BC-4141-ZJF)

The LC-WSB-1 is a portable whiteness meter for evaluating white and near-white material surfaces. It measures blue-light whiteness according to the R457 reflectance method. The instrument uses 45/0 illumination and observation geometry. A completely reflecting ideal surface is defined as a whiteness value of 100, while a nonreflecting black surface is defined as zero. The optical, detection, processing, and display systems work together to provide direct numerical results. A high-definition LCD supports clear reading without significant interference from ambient light. The sample holder and movable platform reduce light leakage around the measurement aperture. Low-drift precision circuitry and a long-life light source support stable operation. A nationally calibrated white standard plate transfers the reference value for reliable measurement.

Power supply: DC 7.5 V or five AA batteries
Display: LCD
Whiteness formula: Blue-light whiteness WB = R457
Measurement range: 0-199.0
Measurement aperture: 15 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: 0.35 kg
Product dimensions: 220 × 76 × 75 mm

Portable battery-powered design
Direct R457 whiteness measurement
Clear LCD readout
Fifteen-millimeter aperture
Low-drift precision circuitry
Light-leak-resistant sample platform
Long-life light source
Standard-plate calibration

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