July 31, 2013 - KIN-TEK adds Humidification module to FlexStream. The Humidification Module adds variable levels of humidity to trace gas mixtures produced by the FlexStream system. Typically, the unit can be used to add adjustable humidity levels between 20% and 90% RH (though not all levels can be achieved at all flows). The FlexStream system uses Trace Source permeation tubes to create trace concentration gas mixtures by mixing the output from the permeation tube with a clean dilution gas. Humidity is added by splitting that dilution flow into two parts.
One part remains dry and passes over the permeation tube to mix with the permeate. The other part is saturated with water. The two parts are mixed and the proportion of wet/dry gas determines the relative humidity. The FlexStream internal computer sets both the dilution flow needed to achieve a specific concentration, and the proportion of wet gas needed to create the required humidity level. The technique used to add moisture to trace concentration mixtures is critical.
If the mixture is bubbled through water, or even makes surface contact with liquid water, its concentration may be changed by loss of the component to the water. In the FlexStream system the trace concentration mixture contacts only water vapor, and flows through inert materials.