Radiometer is a company founded in 1935 with headquarters in Copenhagen

Copenhagen

Copenhagen is the capital and largest city of Denmark, with an urban population of 1,199,224 and a metropolitan population of 1,930,260 . With the completion of the transnational Øresund Bridge in 2000, Copenhagen has become the centre of the increasingly integrating Øresund Region...

, Denmark

Denmark

Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

. They have 2,200 employees worldwide and had sales of USD 496 million in 2010. The first commercial pH meters

PH meter

A pH meter is an electronic instrument used for measuring the pH of a liquid...

 were built around 1936 by Radiometer in Denmark and Arnold Orville Beckman

Arnold Orville Beckman

Arnold Orville Beckman was an American chemist who founded Beckman Instruments based on his 1934 invention of the pH meter, a device for measuring acidity. He also funded the first transistor company, thus giving rise to Silicon Valley.-Early life:Beckman was born in Cullom, Illinois, the son of...

 in the United States. Radiometer was acquired by Danaher

Danaher Corporation

The Danaher Corporation , is a large global company headquartered in Washington, D.C., United States. Its products are concentrated in the fields of design, manufacture, and marketing of industrial and consumer products....

 in 2003 and Beckman Coulter

Beckman Coulter

Beckman Coulter Inc., is a company that makes biomedical laboratory instruments. Founded by Caltech professor Arnold O. Beckman in 1935 as National Technical Laboratories to commercialize a pH meter that he had invented, the company eventually grew to employ over 10,000 people, with $2.4 billion in...

- the company founded by Arnold O. Beckman - was also acquired by Danaher in 2011.