Gas dryers are commonly used in analytical instruments such as gas chromatographs, thermal desorbers, etc... They also are used in sample conditioning systems, where is a need of water removal from gaseous samples to avoid water condensation in sample lines and in gas analysers.
Humidifiers are mostly used in medical devices and in calibration systems, where is a need to supply a gas of stable humidity. New area where gas humidifiers are used is micro-fuel cells as a power sources. These micro-fuel cells require humid hydrogen and Nafion dryers are the best choice for this purpose.