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Title: Measurement By Orifice - Fundamental Principles Of Orifice Meters
Author: Leland K. Spink
Source: 1955 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1955
Abstract: Meter Men who are allergic to mathematics can take comfort in the knowledge that it is not necessary to be a mathematlctan to understand ihe fundamental principles of the orifice meter. It is only necessary to have a reasonable amount of horse sense. We are going to present the subject from a strictly non-mathematical angle. The basis of the orifice meter is a restriction which creates a resistance to flow and a differential gauge or manometer which measures the drop in pressure which is produced. In purpose, the orifice plate, which is thee restriclion, is no dlflerent from a pinched valve. The orifice plate is chosen to create the pressure drop because it is easy to reproduce and there exists calibration data or coefficients for it for determining the quantity passing at any given differential.

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