IMAGEPART NUMBERDESCRIPTION 50-1822eBPR kit with user interface 0.5 to 20 barg This is a general-purpose back pressure regulator supplied with a user interface and serial control 50-1823eBPR-GL kit with user interface 0.1 to 10 barg Back pressure regulator optimised for gases and gas-liquid mixtures 50-1824eBPR kit serial control only 0.5 to 20 barg This is a general-purpose back pressure regulator for serial control only. 50-1825eBPR-GL kit without user interface 0.1 to 10 barg Back pressure regulator optimised for gases and gas-liquid mixtures