1.2. V-CEM5000 Basic Principles

– The V-CEM5000 uses an infrared cross-correlation technique that requires no contact with the flue gases. The method used resembles flow measurement with chemical dye or radioactive tracers, where the velocity is derived from the transport time of the tracer between two measuring points a known distance apart. However, instead of an artificial tracer being added, the naturally
occurring fluctuations of the infrared energy in the gas stream are used as the tracer.
– Fully purged transducers with no moving components make the system highly reliable and minimise maintenance requirements. The instrument is ideally suited to monitoring the flow rate of hot, dirty gases.


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