How Differential Pressure Flow Works

For more information, visit www.Emerson.com/DPFlow
In this video you will learn about different primary element types and how they work, the conventional to modern transition of installation practices, and the functionalities within a differential pressure transmitter.

[@neichyfrancis1866]

This video is really educational. Great work....

[@linkdude64]

Great video! Thanks!

[@totoilongo6132]

Thanks for sharing its helpful

[@herouinihamza3857]

Amazing video. it's very useful and interesting. Many thanks

[@quangluu7531]

Tks for share

[@proteusindustriesinc2637]

Amazing Video, Some doubts are cleared Thanks But, will you tell me what are the limitation of DP Flow Meter?

[@nadeem8111]

Turndown Ratio: DP flow meters have a limited turndown ratio, which refers to the range between the highest and lowest flow rates they can accurately measure. Turndown ratios are typically around 4:1 to 10:1, meaning that the meter's accuracy decreases significantly at flow rates below or above this range. Pressure Loss: DP flow meters introduce a pressure drop in the fluid flow, resulting in energy losses. In applications where maintaining high system pressure is critical, the pressure loss caused by the meter may not be desirable. Fluid Compatibility: DP flow meters may not be compatible with certain fluids due to their corrosive, abrasive, or viscous nature. The material used for the meter's construction must be suitable for the specific fluid to avoid degradation, erosion, or inaccurate measurements. Installation Requirements: DP flow meters require proper installation to ensure accurate readings. The meter must be installed in a section of the pipe with fully developed flow, away from disturbances such as bends, valves, or pumps. Incorrect installation can lead to flow disturbances, affecting the meter's accuracy. Calibration: DP flow meters need periodic calibration to maintain accuracy. Over time, factors such as wear, fluid properties, and changes in the meter's components can affect its calibration. Regular calibration is necessary to ensure accurate measurements. Density Variation: DP flow meters assume a constant fluid density to convert volumetric flow rate to mass flow rate. However, if the fluid density varies significantly due to changes in temperature, pressure, or composition, it can introduce inaccuracies in mass flow rate measurements. Limited Application Range: While DP flow meters are suitable for many applications, they may not be ideal for certain specialized applications. For example, in applications with low flow rates, high viscosity fluids, pulsating flows, or multiphase flows, other flow meter types may be more suitable. It's important to consider these limitations and evaluate whether a DP flow meter is the most appropriate choice for a specific application. Depending on the requirements and constraints of the system, alternative flow meter types may provide better accuracy and performance.

[@aravindhs9988]

Great works I really enjoyed every bit of this explanation.. Can you explain why differential pressure flow meters cannot measure mass flow rate directly thought they are dependent on the fluid's density. We know that change in the fluid's density will affect the meters readings then why it is not termed as mass flow meter and it is called volumetric flow meter.. Thanking you in advance...

[@nadeem8111]

Differential pressure flow meters, such as orifice plates, venturi meters, and flow nozzles, rely on the principle of creating a pressure drop in the fluid to infer the flow rate. While they can provide accurate measurements of volumetric flow rate, they cannot directly measure mass flow rate. The reason for this is that differential pressure flow meters determine the flow rate based on the pressure difference across a constriction in the flow path. By knowing the geometry of the constriction and the pressure difference, the flow rate can be calculated using fluid dynamics principles, assuming a constant fluid density. However, to directly measure mass flow rate, the density of the fluid needs to be known. Differential pressure flow meters do not directly measure density, so the density must be assumed or known in order to convert the volumetric flow rate to mass flow rate. In some cases, the density of the fluid can be assumed to be constant if the composition and temperature of the fluid remain relatively constant. However, for applications where the density of the fluid can vary significantly, such as in processes involving different fluid compositions or changing temperatures, a direct measurement of density is necessary to accurately determine the mass flow rate. To measure mass flow rate directly, other types of flow meters, such as Coriolis flow meters or thermal mass flow meters, are commonly used. These meters can directly measure mass flow rate by employing different principles that take into account the fluid's density and other factors influencing the flow.

[@haziqnadia339]

i want ask some one cant help. why flowmeter gas H2 pressure before 340Nm3/hrs after drop to 11Nm3/hrs..brand micro motion.max flow use 340Nm3 for span

[@sharifhossain8830]

how to calibrate this transmitter Thanks

[@RosemountMeasurement]

Hello! Please reach out to www.emerson.com/en-us/contact-us for your inquiry. Thank you.

[@ramandeepsinghsidhu110]

Sir/Madam can we change the sensor limits with HART?

[@RosemountMeasurement]

Thank you for watching our video! The physical sensor limit is fixed based on the transmitter model number but the measurement span can be configured to a specific range with a HART communication device. Physical sensor limits as well as configurable span limits can be found in the appropriate product data sheet. For any other questions and concerns, feel free to reach out again or contact us at www3.emersonprocess.com/contactus/default.aspx

[@ramandeepsinghsidhu110]

@@RosemountMeasurement thanks for your valuable reply

[@mininathjadhav8705]

I am a Emerson employee

[@yogeshwaran9765]

Bro any vacancy available there

[@dhikipurnamaabdi2562]

izin download

[@omeedfattah5355]

I admit the value of this illustration though r not my area thanks

[@herdianbramantyo1631]

Restrictor

[@nagarjunanag5149]

Here anyone belongs to instrumentation technician/engineer please respond