hazemeter
21Transmissometer — A transmissometer is an instrument for measuring the extinction coefficient of the atmosphere, and for the determination of visual range. It operates by sending a narrow, collimated beam of energy (usually a laser) through the propagation medium …
22Glossmeter — A glossmeter 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… …
23transmissometer — /trans meuh som i teuhr, tranz /, n. Meteorol. an instrument for measuring visibility or the transmission of light in the atmosphere. Also called hazemeter, transmittance meter. [1930 35; TRANSMISS(ION) + O + METER] * * * …
