- October 2008
- Trescal becomes established in the Eastern European countries with the acquisition of a calibration laboratory in Rumania (Bucarest).
- Setpember 2008
- Trescal acquires calibration laboratories located in Belgium (Mechelen and Wellin) and in UK (Teddington - West suburb of London).
- May 2008
- Trescal acquires the calibration laboratory SICI located at Merate near Bergame in Italy.
- November 2007
- Astorg-Partners acquires Trescal.
- March 2006
- TIS-Livingston is renamed TIS Métrologie.
- February 2006
- Livingston Calibration BV in Benelux is renamed Trescal BV.
- December 2005
- Livingston Electronic Equipment Services SA, one of the Trescal
subsidiaries in Spain, is renamed Trescal España de Metrologia.
- April 2005
- Air Liquide announces the sale of Climats SA and Sapratin Technologies SA
to Weiss Umwelttechnik, a branch of the German group Schunk. These two
companies, specialized in the manufacturing of climatic chambers and
related services, had been acquired by Air Liquide in April 2004 when it
acquired the calibration activities of Livingston in continental Europe.
- April 2005
- Livingston Calibration GmbH is renamed Trescal GmbH.
- March 2005
- CEj Measurement Services AB and AREPA Mätteknik AB, the two calibration companies of Air Liquide in Sweden merge to formTrescal Sweden AB.
- June 2004
-
Air Liquide Italia Services enters into the capital of MG Tarature s.r.l. in Italy.
- April 2004
-
A new step in Air Liquide's services strategy with the acquisition of Livingston
calibration/measurement service activities in continental Europe:(TIS Livingston,
SOMELEC, Climats & Sapratin in
France, Livingston Calibration GmbH in Germany, Trescal BV in Holland and Livingston EES in Spain).

Air Liquide calibration service business is named
TRESCAL and operates
in 8 european countries :
-
- January 2004
-
Air Liquide Denmark takes a majority in AREPA Test & Kalibrering A/S in Denmark; Air Liquide Gas AB in Sweden takes over Arepa Mätteknik company, based in Karlskoga, allowing CEJ Measurement Services to enlarge its technical skills and to offer a broader range of services to its customers.
- 2003
-
Air Liquide Spain acquires a majoritystake in ITM calibration service company based in Zaragoza, Spain.
- 2001
- Air Liquide Gas AB in Sweden takes over the calibration laboratory of CE JOHANSSON and creates CEJ Measurement Services AB; first expansion of Air Liquide calibration service business outside France.
- 1999
- METROTECH, a specialist in calibration services in France, joins Air Liquide; this is the launch of Air Liquide calibration service business.
Present in 70 countries, Air Liquide, a specialist in industrial and medical
gases and related services, is pursuing a strategy to develop its range of
industrial services. Since 1999, Air Liquide has been working to build up
its Calibration Service business, centered around its subsidiary Metrotech,
to which a number of other specialized companies have been added.