Sample probes or nozzles are very important and mostly an underestimated part of the sampling system. Probes are designed for extracting a representative portion of the fluid sample source in the pipeline to the sampling system.
A sample probe nozzles works as a filter, keeping dust, pipe scale and entrained liquid drops out of the extracted fluid sample. A good designed sample probe reduce sample volume, limited sample times, gets better response time, eliminate dead volumes, with extending into the center third of the flowing stream it get better representative sample.
The probe extends into the pipe / pipeline to ensure a representative sample that is free of unwanted contaminants that may have collected on the interior pipe wall. Sample probes could be of fixed or insertable / retractable design. The sample probe must be located at a point in the pipe where the flowing stream is properly conditioned.
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