Whiteness Meter AWM-216

Operational Principle

The Illuminant of the instrument is long-life LED with 457nm, conforming to the light source requirement in the JJG 512-2002 National Metrological Whiteness Meter Verification Regulation. The measurement of the instrument adopts the principle of photoelectric effect. The diffuse reflectance Radiant Brightness Energy Value of the sample surface is receive by the optical cell. Then, the value is amplified by high-precision auto zeroing operation amplifier, inputted to the calibration circuit for energy calibration. Then, the whiteness value of the sample is directly shown on the digital display.

Product Parameters

Measuring Range 0~120

Resolution 0.1

Illumination Condition 45/0

Illuminant LED 457 nm

Whiteness Formula Blue Light Whiteness WB=R457

Measuring Aperture 11x18 mm Rectangle

Zero Drift ≤0.1

Stability of Display ≤0.5

Repeatability ≤0.1

Operating Condition Temperature: 0~40 ℃ Humidity: <85 %RH

Power Supply Lithium Battery

Size 136x44x78 mm

Weight 305 g (Not including batteries)