This guide explains moisture‑removal methods for gas analysis and details Perma Pure’s Nafion®‑based gas sample dryers and their applications.
Accurate gas analysis requires a dry sample stream because water vapor interferes with many measurement techniques. The guide outlines five common applications where moisture removal is critical, including infrared CO₂ analysis, CEMS and process analyzers, sample combustion for TOC/mercury, electrochemical sensors, and intake‑air drying for chemiluminescence and IMS.
Perma Pure’s Nafion®‑based dryers use selective moisture transfer through Nafion tubing, allowing water to move without pressure and leaving other gases unchanged. The product line includes the ME series for ambient drying, the MD series (0‑2 L PM) and PD series (1‑40 L PM) for low‑dew‑point drying, with various purge‑gas options such as instrument air, nitrogen, reflux, atmospheric vacuum, split‑sample, and combination methods.
| Achievable dew point | below –20 °C |
|---|---|
| MD Series flow range | 0‑2 L PM |
| PD Series flow range | 1‑40 L PM |
| Purge gas flow recommendation | 2‑3 × sample gas flow |