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Title: Rotary Meters
Author: W. K. Clark
Source: 1975 Appalachian Gas Measurement Short Course
Year Published: 1975
Abstract: The first rotary positive displacement gas meters were built about 1920 by the PH & FM ROOTS Company and the Connersville Blower Company, both located in Connersville, Indiana. The two companies later joined to form ROOTS-Connersville Blower, and in 1966 the gas meter operation was re-named Dresser Measurement Division. The rotary gas meters manufactured by Dresser Measurement are 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 vane design known as the CVM gas meter. The operating principles for each of these three meters are depicted and explained in Figures 1, 2, and 3. Since the majority of meters in use today are the ROOTS Meters, the comments in this paper will be directed toward the ROOTS Meter however, most comments are directly applicable to the other types of rotary meters.

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