Vaisala Oyj is a Finnish company specializing in the development, manufacture, and marketing of products and services for environmental and industrial measurement. Founded in the 1930s by Professor Vilho Väisälä, who pioneered radiosonde technology, it has grown into a global leader with over 2,400 employees serving more than 150 countries. The company operates in two main business areas: Weather and Environment, covering meteorology, aviation, renewable energy, ground transportation, and ambient air quality; and Industrial Measurements, supporting sectors like pharmaceuticals, power generation, semiconductors, and building automation. Key products include humidity and temperature sensors, dewpoint instruments, barometric pressure sensors, carbon dioxide monitors, radiosondes, weather radars, and multi-parameter weather transmitters. Notable innovations encompass HUMICAP® humidity sensors, BAROCAP® pressure technology, and services like Vaisala Xweather for environmental data. Headquartered in Vantaa, Finland, Vaisala Oyj maintains a worldwide presence through offices and operations across Europe, the Americas, Asia-Pacific, and the Middle East, emphasizing precision measurement for critical applications in weather-dependent industries and scientific research.