A disdrometer is a device that measures hydrometeors--phenomena formed by condensation or the precipitation of moisture in our atmosphere. These devices measure the size of the drops contained in a hydrometeor, as well as its velocity. New 2D video units can analyze individual snowflakes.
A disdrometer is an instrument used to measure the drop size distribution and velocity of falling hydrometeors. Some disdrometers can distinguish between rain, graupel, and hail. The uses for disdrometers are numerous. They can be used for traffic control, scientific examination, airport observation systems, and hydrology. The latest disdrometers employ microwave or laser technologies. 2D video disdrometers can be used to analyze individual snowflakes.