Vaisala - Weather monitoring systems
Vaisala develops, manufactures and markets products and services for environmental and industrial measurement.
Vaisala's origins date back to the 1930's when Professor Vilho Väisälä, Vaisala's founder and long-time managing director, invented some of the operating principles of a radiosonde. He sent the first Finnish radiosonde aloft in December 1931....History - Vaisala
Vaisala - Wikipedia
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