Problem samples liquids, slurries and solids

These three main classes of process sample streams are in increasing order of difficulty for near-infrared process analysis. In general, liquid streams are best measured in a transmission sampling mode, solids (powders) in diffuse reflectance mode, and slurries in either diffuse reflectance or diffuse transmission according to whether the liquid phase or the suspended phase is of greater analytical signihcance. If the 

Sample stream switching Blending component and sample conditioning feed streams 

When considering liquid sampling, issues of sample path length, sample temperature and pressure, and sample viscosity, along with the overall process engineering environment, will influence the final decision 

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