Pfeiffer Vacuum GmbH develops, manufactures and markets components and systems for vacuum generation, measurement and analysis. Its products include pumps such as rotary vane, roots, diaphragm, side channels, piston, screw, turbo pumps, valves, helium detectors, mass spectrometers, and components. The company was founded by Arthur Pfeiffer in 1890 and is headquartered in Asslar, Germany.