Ardian-backed Trescal has purchased Master Metrology Inc. and Gefran's Italian measurement assets.

Master Metrology, headquartered in Towson, Maryland, provides accredited calibration services to manufacturers in defense, aerospace and biotechnology. Terms of the deal were not disclosed.

Gefran, based in Provaglio d'Iseo, Italy, sold its automation components and control systems group. The company says the sale is part of a strategy to focus on core industrial businesses, and that it received about $2 million for the transaction. 

Trecal provides calibration services to the test and measuring equipment market. The Rungis, France-based company acquired Instrument Calibration Services and Test Equipment Repair Corp. in April. In October, the group bought SE Laboratories Inc. 

Trescal is owned by Paris private equity firm Ardian, formerly Axa Private Equity. The group was founded in 1996 by Dominique Senequier, who currently serves as vice president of the supervisory board of luxury brand Hermes International. The firm, in April, raised a $10 billion fund of funds, and also closed a $690 million private equity fund. Ardian picked up a $1.7 billion portfolio of limited partner interest in the private equity buyout funds and a portfolio of stakes in companies from Citigroup Inc. (NYSE: C).