US-based PerkinElmer agreed to acquire Perten Instruments of Sweden, a leader in analytical instruments, to improve its food testing portfolio, Perten said.

A purchase price was not disclosed. Under ownership of Valedo Partners, which acquired Perten in 2010, the company doubled in size. Perten employs 200 people and has annual sales in excess of USD 50 million (EUR 40 million, the company said. PerkinElmer, based in Waltham, Massachusetts, is a technology company in the health, safety and environment fields with about 7,600 employees and sales of USD 2.2 billion.