Flow Differential Pressure

Differential Pressure Gauge


Differential pressure measurement is a universal flow measurement for liquids, gases and vapors, composed of flow meters that work on the principle of partially obstructing the flow in a pipe. They introduce a constriction in the pipe that creates a pressure drop across the flow meter. When the flow increases, more pressure drop is created, and as a result, impulse piping routes the upstream and downstream pressures of the flow meter to the transmitter that measures the differential pressure to determine the fluid flow. Differential pressure flow meters always provides accurate results even with large bores, high temperature and extreme pressure.


Endress + Hauser offers two lines of differential pressure products for flow measurement. The Deltatop line is an internationally standardized system with primary flow elements such as average pitot tubes, orifice plates, chambers, nozzles and flange taps that all work together seamlessly for the most accurate differential pressure measurement. The Deltabar is a differential pressure transmitter with metal sensor for measurement of pressure differences, offering long term stability for up to 5 or 10 years and suitable fo SIL2 or SIL3 applications. Website
idSolutions offers several primary flow elements including - Wedge meters, Venturi tubes, a Cone Meter, Nozzles, Orifice Plate Assemblies, and Multi Port Self Averaging Pitot Tubes. These instruments are engineered to meet the most demanding flow metering applications and required standards including ASME MFC-3M, ISO 5167, AGA 3, PTC-6, PTC-19.5, B31.1 and B31.3. These well-established technologies use differential pressure measurement across various flow restriction designs to measure velocity, volumetric and mass flow as described by simple laws of physics. Website