Photoelectric transmittance meter

From Glossary of Meteorology



photoelectric transmittance meter[edit | edit source]

(Or photoelectric transmissometer.) An instrument for measuring the transmissivity of the atmosphere; a type of transmissometer.

It consists of a constant-intensity collimated light source located at a suitable distance from a photoelectric cell. Variation in the turbidity of the atmosphere causes changes in the intensity of the light received by the photo cell, thereby varying its electrical output.


  1. A gaseous envelope gravitationally bound to a celestial body (e.g., a planet, its satellite, or a star).
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