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Title: Fundamentals Of Diaphragm Type Positive Displacement Meters
Author: John Esola
Source: 1984 Appalachian Gas Measurement Short Course
Year Published: 1984
Abstract: The Positive Displacement Meter principle is applied on both diaphragm type and rotary type meters. Although the operational principle is different, the fact remains that both types measure by means of sealing off a known quantity of gas, and subsequently releasing it. The bulk of the meters in use today are of the positive displacement type. Over 40 million gas meters are employed in measuring gas volumes by positive displacement in the U.S. Of this total, the large majority are used to measure gas volumes consumed by domestic residential customers. Other measurement principles are applied in the case of the Turbo-Meter, Orifice Meter or Swirl Meter.

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