Siemens Orifice plate with annular chamber and Differentiall strain dimension is a prevalent go with the flow measurement for liquids gases and vapors.Differential pressure drift meter always offer correct results regardless of large bores excessive temperature and extreme stress.primary differential strain gadgets like SITRANS F O orifice are standardized mechanical flow sensors in accordance DIN EN ISO 5167 which can be used for extent and mass float size.orifice plates with annular chambers are very robust and may be used in a wide variety of nominal diameters.and The electronics required similarly may be used over a long distance from the measuring area.see more:-siemenstransmittercom/product/Orifice-plate-with-annular-chamber/1522