Bourdon - Baumer Group | 2,708 followers on LinkedIn. A leading brand for mechanical process instrumentation, the Original from the inventor of the Bourdon tube. | Today, Bourdon® is one of the world leading brands for mechanical process instrumentation and belongs with its international business locations to the Baumer Group. It was created in 2005 by the acquisition of the service portfolios and competences of the formerly well-known brands Bourdon-Sedeme and Haenni. Historically, this competence and passion is based on the Bourdon tube invented in 1835 by Eugène Bourdon, which is the central component for precise mechanical pressure measurement technology, today and in the future.