Critical Orifice Set or Individual Critical Orifice

To be used as a dry gas meter calibration reference, the Clean Air Express Critical orifice offers 1/2″ brass quick connects with an internal synthetic sapphire orifice disk. A set contains five orifices ranging from 10- 34 LPM, as prescribed in EPA Method 5. Each set comes complete with a dust-proof/moisture proof lifetime guaranteed carrying case. Individual calibration sheets are also included. For more information on this method, please visit the EPA’s CFR 40 website.

• Service/Calibration