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Title: Fundamental Principles Of Displacement Meters
Author: Kenneth R. George
Source: 1974 International School of Hydrocarbon Measurement
Year Published: 1974
Abstract: The P o s i t i v e Displacement Meter p r i n c i p l e is a p p l i e d on both diaphragm type and r o t a r y type m e t e r s . Although the o p e r a t i o n a l p r i n c i p l e is d i f f e r e n t , the f a c t remains t h a t both types measure by means of s e a l i n g off a known q u a n t i ty of g a s , and subsequently r e l e a s i n g i t . The bulk of the meters in use today a r e of the p o s i t i ve displacement t y p e . Over 40 m i l l i o n gas meters a re employed in measuring gas volumes by p o s i t i v e d i s placement in the U.S. Of t h i s t o t a l , the l a r ge m a j o r i t y a r e used to measure gas volumes consumed by domestic r e s i d e n t i a l customers. Other measurement p r i n c i p l e s a r e a p p l i e d in the case of the Turbo-Meter, O r i f i c e Meter or Swirl Meter.

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