Commercial production since 1936

After the first sounding, Väisälä continued with further development and tests until a radiosonde could be brought into commercial production. Radiosonde deliveries started with the RS11 (1936–). Amongst its first customers was the Massachusetts Institute of Technology. In 1937, Väisälä's radiosonde won a gold medal at the World Fair in Paris.

Recovering from the wars

World War II, the Finnish Winter War 1939–1940, and the Finnish Continuation War 1941–1944 disrupted many lives and upset business and delivery activities internationally. The post-war decades witnessed a strenuous effort to revive the national and international economies. Vaisala grew to employ 60 people in 1954. The first issue of Vaisala News magazine was published in 1959. 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.

Vigorous 1970s and 80s

The 1970s and 1980s were busy decades for Vaisala. Thin-film technology was developed for Vaisala HUMICAP® relative humidity sensors - the first in the world. The Vaisala CORA Automatic Sounding System - along with automatic weather stations, road weather stations and aviation weather systems – was introduced. In 1975, Vaisala employed over 200 people. 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. A traffic weather company was also acquired in the UK. Vaisala's first cleanroom was built to enable the design and manufacture of semiconductors in-house. Vaisala BAROCAP® barometric pressure sensor technology was introduced, as well as a new radiosonde family - the Vaisala Radiosonde RS80 (1981–2008). These units made use of a water-activated wet battery that had a very long storage life and high power density but a limited working life. The Professor Vilho Väisälä Award was established in cooperation with the WMO, to stimulate interest in meteorological research involving meteorological observation methods and instruments.

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. GPS positioning information was added to gain more accurate wind speed information.

New millennium

CEO Pekka Ketonen was appointed in 1992. The company was listed on the Helsinki Exchanges in 1994. By then, it employed over 600 people. Further product developments included the introduction of GPS technology for upper air wind measurement, the Vaisala CARBOCAP CO₂ sensor, and Vaisala DRYCAP sensor technology for industrial dewpoint measurement. New offices were established in France and China, and business acquisitions in aviation weather and surface weather further enhanced Vaisala's presence in the USA.

Vaisala RS92-SGPD (left) and its successor, the RS41-SGP (right).

The new millennium was kicked off with yet more business acquisitions - in wind profiling, lightning detection, and aviation weather. U.S. manufacturing operations were concentrated in Boulder, Colorado. New product launches included a new radiosonde product family - the Vaisala Radiosonde RS92 (2003 - in production), as well as the Vaisala Weather Transmitter, which measures the six most essential weather parameters in one compact instrument. This was much improved from the previous generation device and now included consumer cells^[14] to make up the battery due to energy saving techniques.

CEO Ketonen retired on October 1, 2006. Vaisala's board of directors appointed Kjell Forsén the new company CEO. Forsén last served as president of Ericsson Finland before joining Vaisala on September 18, 2006.

Vaisala technology has played a part in space exploration for some 60 years, for instance the Mars Rover Curiosity and Schiaparelli EDM lander contain pressure and humidity sensors manufactured by Vaisala.^[15][16]

With new developments in miniaturization, communications, and sensors a new radiosonde the model RS41 (2014 – in production) was announced. This model had again made improvements in specifications.^[17] Launch preparation made simple with the RI41 ground check device. It is smaller and has pre-flight dry-point humidity sensor calibration achieved by heating the sensor to drive off contaminants. It is also available in a model (RS41-SG) without a pressure sensor, the pressure reading is derived from the GPS altitude, temperature and humidity readings.

1980s

• 1987: the Group acquired Tycho Technologies Inc. of USA, manufacturer of upper air wind profiler.
• August 1989: the Group acquired the British Thermal Mapping International Ltd. of the United Kingdom. Thermal Mapping specializes in measuring the thermal characteristics of roads and runways and in providing forecast models.

1990s

• June 1995: the Group sold Vaisala Technologies Inc. to Breed Technologies Inc. of USA. Vaisala Technologies Inc. (VTI) manufactured silicon capacitive sensors for the car industry.
• July 1996: the Group acquired Artais Weather Check Inc. of USA.
• March 1999: the Group acquired AIR Inc. of USA.
• October 1999: the Group acquired Handar Inc. of USA.

2000s

• February 2000: the Group acquired Dimension SA of France.
• October 2000: The Group acquired Jenoptik Impulsphysik GmbH of Germany.
• June 2001: the Group acquired the Meteorological Systems Unit of Radian International LLC of USA.
• March 2002: the Group acquired Global Atmospherics Inc. of Tucson, Arizona, USA.
• July 2005: the Group acquired CLH Inc. of Minneapolis, Minnesota, USA.
• January 2006: the Group acquired Sigmet Corporation of Westford, Massachusetts, USA.
• January 2009: the Group acquired Aviation System Maintenance Inc. (ASMI), Kansas, USA.
• December 2009: the Group acquired Quixote Transportation Technologies (QTT), a subsidiary to Quixote Corporation.

2010s

• March 2010: the Group acquired Veriteq Instruments Inc. of Vancouver, BC, Canada
• August 2013: the Group acquired remote sensing manufacturer Second Wind Systems Inc. of Somerville, Massachusetts.^[19]
• December 2013: the Group acquired 3TIER, Inc., a renewable energy assessment and forecasting services company, headquartered in Seattle, Washington.^[20]
• October 2017: Vaisala acquired Vionice, a Finnish IT company specialized in computer vision and artificial intelligence.^[7]
• October 2018: Vaisala acquired all the shares in Leosphere SAS, a French company specializing in developing, manufacturing and servicing turnkey wind lidar instruments for wind energy, aviation, meteorology, and air quality.^[21][22]
• December 2018: Vaisala acquired Finnish K-Patents, a pioneer in in-line liquid measurements for industrial applications.^[9]
• August 2019: Vaisala announced acquisition of Professional Business-to-Business Weather Services from Foreca.^[23]

Weather and Environment

The Weather and Environment Business Area is divided into five business segments: Meteorology, Ground Transportation, Aviation, Renewable Energy, and Ambient Air Quality. The customers include meteorological institutes, airports and airlines, road and railroad authorities, renewable energy customers, maritime market segments, as well as defense forces.^[24]

Industrial Measurements

Industrial Measurements customers include multiple industries, including pharmaceutical, biotechnical, medical device, and drug distribution companies, as well as the power generation and transmission, maritime, automotive, semiconductor, electronics and building automation industries.^[25]

Measurement Instruments

• Humidity and temperature measurement instruments
• Dewpoint measurement instruments
• Barometric pressure measurement instruments
• Carbon dioxide measurement instruments
• Moisture in oil measurement instruments
• Oxygen measurement instruments
• Wind measurement instruments
• Weather multi-sensor
• Optical weather instruments

Measurement Systems

Vaisala Marwin Rawinsonde Set MW 12

• Radiosondes and sounding systems
• Dropsondes
• Surface weather systems
• Thunderstorm information systems
• Weather radars
• Windprofilers

Application and Services

• Aviation weather systems
• Traffic weather systems
• Meteorological and hydrological systems

Services and Data Subscription Services

• Customized applications, such as network operation, decision support services and tailored service packages
• Data through Vaisala's own observation network.

Wind Resource & Energy Assessment Services // Remote Sensing Measurement for Wind Industry

• Customized assessment services based on Numerical weather prediction (NWP) such as due diligence assessment, energy production forecasts, consulting offering
• Vaisala's Triton is a SODAR (Sonic Detection And Ranging) device designed for use in wind energy applications