# Home > Measuring-Instruments > Flow Measurement

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**Topic under **Flow Measurement

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Thu Apr 12, 2018 05:17:17 AM

__Short Desciption__:

THEORY OF ORIFICE MEASUREMENT
The law of conservation of energy applied to a fluid under
the condition of steady, uniform flow requires the total
energy of the system to remain constant. Therefore, the sum
of the potential energy, pressure energy, internal energy, and
kinetic energy upstream of a constriction must equal the sum
of the potential energy, pressure energy, internal energy, and
kinetic energy downstream of the constriction, assuming that
no heat has been added or lost.

__Summary__:

The wide variety of applications available today demands
dependable, accurate measurement. Recently, significant
improvements in metering standards and secondary
equipment have enhanced the overall quality and efficiency
of orifice metering. Given the proper design considerations,
orifice metering satisfies the measurement requirements for
a variety of applications.

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"ORIFICE METERING FUNDAMENTALS "

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