Sarian is a market leader in the European wireless router market.
Digi has paid around US $30.5m for all the outstanding ordinary shares of Sarian.

Sarian designs, develops and manufactures advanced wireless/cellular (internet protocol) IP Routing equipment for mission critical applications.

The company was founded in 1999 by Andy Hood, Robin Hudson, and Nick Monaghan in Steeton, near Keighley, on a kitchen table.

Sarian moved to Ilkley in March 2000.

"As we got to know the Sarian team and business, it quickly became apparent that this acquisition was a great fit on many levels," said Joe Dunsmore, chairman, president and chief executive officer of Digi.

"We're acquiring a highgrowth, profitable wireless business that can be expanded from Europe into other parts of the world.

"We have very similar corporate cultures and strategies so integration will be straightforward. And with Sarian's strong European engineering and sales presence, we're immediately increasing the international content and capabilities of our business."

Andrew Hood, managing and technical director of Sarian, added: "With the great cultural and technical fit we see Digi as the ideal partner to take the fast growing business that we have in Europe, Scandinavia and Southern Africa into many other geographic regions."

A spokesman for Digi said the company would retain the Sarian office in Ilkley.

Digi International was founded in 1985 as DigiBoard.

The company went public as Digi International in 1989 and is traded on the NASDAQ National Market in the US.

It employs more than 550 people worldwide and is headquartered in Minnetonka, Minnesota, a suburb of Minneapolis.