Critical Orifice Set |
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Method 5- Isokinetic |
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To be used as a dry gas meter calibration reference, the Clean Air Engineering 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. |
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