American 4" aluminum turbine gas meter, mdl GTX-18M-175, 18,000 CFH, has 4" flange connection, odometer counter, capacity of 1,800,000 BTU, 18000 SCFH or MBH @ 1/4 PSI...
Ritter wet test flow meter, type TG254, serial number 0.523.7A3. Manufactured in 2003. Unit is on cart. Last used in minerals research and development lab.