APPLICATIONS - Used as a line or point of use regulator for specialty gas applications requiring very precise repeatability and a high precision of outlet pressure - Ideally suited for laboratory applications like: gas delivery to inductive plasma spectrometer, protection and support gas for chromatograph. KEY FEATURES Bellow technology provides a large range of accurate outlet pressures in a compact design. With its compact design, the rear threads and its fixing ring (option) it can be used for wall or panel mounting. Acetylene version available: Series S 20 AD & S 25 AD (See pages 66 and 68)