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Title: Fundamentals Of Rotary Metering
Author: James B. Bennett
Source: 1990 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1990
Abstract: The first positive displacement rotary gas meters were built in 1920 by the PH & FM ROOTS Company and the Connersville Blower Company, both located in Connersville, Indiana. In 1966, this gas meter operation was renamed Dresser Measurement Division. However, these rotary meters today are still known as ROOTS Meters. Rockwell International entered the market in the early 1960s with a rotating vane design known as the ROTO-Seal Meter, and in the late 1960s Singers American Meter Company introduced still another rotating design known as the CVM gas meter. There are several foreign competitors who also manufacture a lobed rotary meter. The operating principles for each of these three meters are depicted and explained in Exhibit #1.

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