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Whiteness Meter NWNM-201

Whiteness Meter NWNM-201

Whiteness Meter NWNM-201

Whiteness Meter NWNM-201 adopted with the principle of photoelectric effect for measurement and whiteness calculation formula of the instrument is blue light whiteness R457. Built in with optical system, display system, detection system, data process and light source. Optical cell received the diffuse reflectance radiant brightness energy value of the sample surface. High-precision auto zeroing operation amplifier, amplified the value of sample surface and for energy calibration it is inputted to the calibration circuit. The whiteness value of the sample is directly shown on the display. It is used to measure the whiteness value of powder or object with flat surface.


Range 0 to 120 unit
Resolution 0.1 unit
Illumination Condition 45/0
Illuminant LED 457 nm
Whiteness Formula Blue Light Whiteness WB=R457
Measuring Aperture 18×11 mm Rectangle
Zero Drift ≤ 0.1
Stability Of Display ≤ 0.5
Repeatability Of Measurement ≤ 0.1
Ambient Temperature 0 to 40°C
Temperature Humidity < 85% RH
Power Supply Lithium Battery
Unit Dimension 140×45×75 mm
Probe Dimension Nil
Weight 305 g (Including Batteries)



Whiteness Meter is widely used in whiteness measurement of white cement, enamel, ceramics, detergent, chemical construction materials, paper board, plastic products, dyeing, paint and textile printing and dyeing, paint. It is also used in food and cosmetic industries for flour, salt, starch, talc powder and other substances.

Standard Accessories

Accessories No. Accessories Name
1. Main Unit
2. AC Adaptor
3. Standard White Board
4. Optical Cleaning Cotton Cloth
5. Carrying Case

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Whiteness Meter