Elliptical Probes from Sensocon Produce Steady, Accurate Signal

Sensocon’s FloSen Airflow Measuring Probes have an elliptical shape that improves the accuracy of airflow measurement.

The probes are used to measure airflow in commercial HVAC systems.  They are capable of continuously measuring and monitoring duct air volumes.  They produce steady, non-pulsating signals of total and static pressure, and measure air volumes within 1% accuracy.

Competing products have a round shaft.  This causes turbulence in the airflow around the probe. The flow around the cylindrical shaft creates vortices downstream.  Opposing vortices collide, amplifying signals and creating vibrations and acoustic problems.

The air flowing past a round probe does not conform to the surface of the probe; because the curve of the probe is extreme, the airflow continues moving in an outward direction when the probe curves in.  This separation effect decreases the accuracy of reading low static pressure signals.

The elliptical shape of Sensocon’s probes means the flow layers conform to the probe surface.  There are no vortices or vacuum effects.  The results are accurate, consistent and repeatable.

The probes use an inline groove for total pressure sensing and dual ports for static pressure testing. The two pressure signals are then sent to a differential pressure device, which gives the velocity pressure reading (total pressure – static pressure). The total and static pressure measuring points are distributed for equal-area averaging of flows, resulting in improved accuracy and reliability.

Because the Flosen sensors offer the lowest pressure drop of any airflow-measuring device available, HVAC operating costs can be lowered substantially. The insertion-style probes can be easily installed from outside the ducts, reducing installation and maintenance costs as well.

For more information about how Sensocon’s elliptical probes can improve airflow measurement and save money, call 1-863-248-2800 or visit Sensocon’s website at http://www.sensocon.com.

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