MesuLab Whiteness meter

A whiteness meter is an instrument used to measure the whiteness of products.

A whiteness meter is an optical instrument used to measure the whiteness of an object's surface and is widely applied in quality inspection in industries such as flour, starch, textiles, plastics, and building materials. Its working principle is based on the measurement of blue light diffuse reflectance, using wavelength light sources and integrating sphere technology, and complies with multiple international and national standards.

The products include portable and desktop types, and some models are equipped with fluorescence whitening measurement functions.

Working principle

The instrument measures the absolute spectral diffuse reflectance by using an integrating sphere. Its optical principle is that the blue light emitted by a semiconductor light source directly enters the integrating sphere. After the blue light is diffusedly reflected on the inner wall of the integrating sphere, it shines on the sample at the test port. The spectrum reflected from the sample surface is received by a silicon photovoltaic cell after passing through a condenser, a diaphragm, and a color filter group, and then converted into an electrical signal. Another silicon photovoltaic cell receives the substrate signal within the sphere. Users can very easily use this instrument to test the whiteness of various samples.

Application

Used for measuring blue light whiteness of object surface and the result is displayed digitally (Built-in printer). Its   operation is simple with high measurement accuracy. It applies to departments requiring whiteness measurement of   products, such as flour, starch, rice flour, salt, textile, dyeing and finishing, paint, ceramics, enamel,   paper ,grain and pulp.