Upchurch Scientific®  founded in 1975  and Rheodyne®  founded in 1976  both belong to the IDEX Health & Science branch of IDEX Corporation UPCHURCH SCIENTIFIC is today the leading manufacturer of fittings  tubing and accessories for the demanding HPLC market and other analytical  biotech  diagnostic and related liquid-transfer instrument markets: RHEODYNE is the industry standard when it comes to injection valves for HPLC