The Bourdon tube is named for its inventor, Eugene Bourdon, a French engineer who patented the design in 1849
The majority of pressure gauges in use today have a Bourdon tube as a measuring element
The Bourdon tube is a device that senses pressure and converts pressure into displacement
The pressure displacement is mechanically amplified through a series of gears and linkages and indicated by a pointer
Thus, the pointer position indirectly indicates pressure