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.

[10] The parent company Vaisala Oyj, domicile in Vantaa, Finland, is listed on the NASDAQ OMX Helsinki.

After the first sounding, Väisälä continued with further development and tests until a radiosonde could be brought into production and deliveries started in 1936.

In 1944, Prof. Väisälä established a company called Mittari Oy ("Gauge Incorporated") and set up manufacturing facilities for radiosonde systems.

The first sounding system included a semi-automatic radiosonde receiver, a calibration device, and a ground check set.

From a modest start, the company evolved to become a world leader in many measurement fields and to establish a noteworthy Finnish export industry.

Thanks to major product development efforts, during the 1950s and 1960s, the Vaisala Sounding System became completely electronic, the first automatic radiosonde receiver and the world's first fully transistorized radiosonde RS13 (1965–) were introduced, and the first weather satellite image receiver was delivered.

Yrjö Toivola took over as the managing director of the company when Professor Vilho Väisälä died in 1969.

During the 1980s, numerous new offices were established to ensure the company's ability to serve customers worldwide – in the UK, Japan, USA, Germany, and Australia.

The radiosondes have also been used in many upper air ozone research studies using an attached detector that had the sensor data multiplexed with the standard meteorology dataset.

The new millennium was kicked off with yet more business acquisitions - in wind profiling, lightning detection, and aviation weather.

This was much improved from the previous generation device and now included consumer cells[13] to make up the battery due to energy saving techniques.

The Vaisala Group strives for global market and product leadership in selected business areas[17] The goal is achieved mainly by organic growth and supplemented by corporate acquisitions.