Differential pressure transmitter DP-Style, 266DSH: High-performance differential pressure transmitter., B: Measuring range limit (Sensor Span) of 40 kPa (400 mbar)., S: Flange material made of 316L Stainless Steel., H: Gasket in Viton., At: Process connections from 1/4 in. - 18 NPT., 2: Diaphragm material made of 316L Stainless Steel., At: Filling fluid Silicone Oil., 7: Housing material made of Die-cast aluminium., E2: Communication Protocol HART (with specific options for digital review)., LS: Option for Display LCD., A1: Certification for classified areas (e.g. ATEX Flameproof)., B1: Mounting bracket included for 2-inch pipe.