History of acquisitions and divestments

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

Year 2009

in December 2009 the Group acquired Quixote Transportation Technologies, Inc. (QTT), USA.
in January 2009 the Group acquired Aviation Systems Maintenance, Inc (ASMI), Kansas, USA.

Year 2005

in December 2005 the Group acquired Sigmet Corporation of Westford, Massachusetts, USA.
in July 2005 the Group acquired CLH Inc. of Minneapolis, Minnesota, USA.

Year 2002

in March 2002 the Group acquired Global Atmospherics Corporation of Tucson, Arizona, USA.

Year 2001

in June 2001 the Group acquired the Meteorological Systems Unit of Radian International LLC of USA.

Year 2000

in October 2000 the Group acquired Jenoptik Impulsphysik GmbH of Germany.
in February 2000 the Group acquired Dimension SA of France.

Year 1999

in October 1999 the Group acquired Handar Inc. of USA.
in March 1999 the Group acquired AIR Inc. of USA.

Year 1996

in July 1996 the Group acquired Artais Weather Check Inc. of USA.

Year 1995

in 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.

Year 1989

in August 1989 the Group acquired the British Thermal Mapping International Ltd. of United Kingdom. Thermal Mapping specialized in measuring the thermal characteristics of roads and runways and in providing forecast models.

Year 1985

in 1985 the Group acquired Tycho Technologies Inc. of USA, manufacturer of upper air windprofiler.