ldis: Laser Disdrometer

A laser disdrometer (LDIS) measures the drop size spectra and fall velocity of hydrometeors during precipitation events. The passage of hydrometeors through a horizontal area positioned between an eye-safe laser and an array detector results in blockage of the laser beam in proportion to the size of the drop or particle. In addition to drop/particle size and fall speed, precipitation type is classified.

ARM also deploys video disdrometers (VDIS).



  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Bartholomew MJ. 2014. ARM’s Handbook for the Parsivel2 Laser Disdrometer. U.S. DOE, Office of Science, Office of Biological and Environmental Research. DOE/SC-ARM-TR-137.

View All Related Publications