Vaisala Oyj is a Finnish company that produces products and services for environmental and industrial measurement. Their major customer groups and markets are national meteorological and hydrological services, aviation authorities, defense forces, road authorities, the weather critical energy sector, life science and high-technology industries, and building automation. Vaisala had over 1,900 employees and net sales of €379.5 million in 2020. Vaisala serves customers in more than 150 countries. The parent company Vaisala Oyj, domicile in Vantaa, Finland, is listed on the NASDAQ OMX Helsinki. Vaisala Group has offices and operations in Finland, the United States, Australia, Brazil, Canada, China, France, Germany, India, Italy, Japan, Kenya, Malaysia, México, South Korea, Sweden, United Arab Emirates, and the United Kingdom. Wikipedia