A gloss meter measures specular reflection. The light intensity is registered over a small range of the reflection angle. The intensity is dependent on the material and the angle of illumination. In case of non-metals (coatings, plastics) the amount of reflected light increases with the increase of the illumination angle. The remaining illuminated light penetrates the material and is absorbed or diffusely scattered dependent on the color. Metals have a much higher reflection and are less angle dependent than non-metals Color difference Meter.
A glossmeter gives the amount of reflected light from a sample, compared to that reflected from a black glass calibration standard with a defined refractive index. The result is independent of the amount of incident light. The gloss value of the reference standard is defined to be 100 gloss units. Materials with a higher refractive index can have a measurement value above 100 gloss units. For transparent materials, the gloss can be increased by multiple reflections in the bulk of the material. Due to the high reflectivity of metals, values as high as 3500 gloss units can be obtained. For these applications it is common to use percent reflection of incident light rather than gloss units. Use this gloss meter to evaluate the gloss of any coated surface, check paints or inks, inspect print materials, and more! Using an infrared source that emits a beam of light at an angle to the surface, a sensor measures the reflected light.
Features a 3-digit LCD and is switch selectable for a standard 60° measurement angle or a 20° angle for measuring high-gloss surfaces. Sensor is separate from meter for measuring hard-to-reach surfaces. Note: Not recommended for polished metals.
1-ft (30.5 cm) coiled connection cable and four 1.5 V AAA batteries