ANSI-B109.2 › Complete Document History
Diaphragm-Type Gas Displacement Meters (Over 500 Cubic Feetper Hour Capacity).

Complete Current Edition:
   2020 EDITION - DIAPHRAGM-TYPE GAS DISPLACEMENT METERS (500 Cubic Feet Per Hour Capacity and Over) - Jan. 1, 2020

Obsolete Revision Information:
   2000 EDITION - Diaphragm-Type Gas Displacement Meters (Over 500 Cubic Feetper Hour Capacity). - April 1, 2000
   1992 EDITION - DIAPHRAGM-TYPE GAS DISPLACEMEN - Jan. 1, 1992