What are the advantages of an ME Dryer compared to a water trap or HME?
Simplicity – A water trap collects liquids that must be drained periodically. Since the ME dryer is removing water vapor, no condensate is formed, and the potential for liquid carryover is eliminated. Further there is absolutely no operator interaction or maintenance required. Performance – The breath sample at the outlet of a water trap is still saturated (100% RH), whereas the ME will reduce the sample humidity to room levels (generally 30-50%RH). Analytical Accuracy – Using a water trap for moisture removal in the presence of water soluble compounds such as NO2 causes sample integrity problems, since they can dissolve out in the condensate. An ME Dryer will selectively remove water vapor without affecting the gases being measured.
