Duct Mounted Airflow Measurement Station | Series STRA

The Series STRA Airflow Measurement Station is easy to install -- simply connect the tubing to the station fittings, then to a differential pressure manometer, gage, transmitter or switch.

Single or multiple airflow elements are factory mounted and pre-piped in a casing designed for flanged connection to the duct work. The Series STRA utilises an airflow averaging element in a head-type device, generating a differential (velocity) pressure signal similar to the orifice, venturi, and other head producing primary elements. It has been developed with a honeycomb airflow straightening section for use in duct systems having highly turbulent conditions at the point of measurement.

Strategically located sensing ports continually sample the total and static pressures when inserted normal to flow. Total pressures sensed by the upstream ports are continually averaged within the airflow element in an isolated chamber. The static sensing ports are averaged in a second isolation chamber. Multiple elements are joined together for connection to a differential measurement device (gage, transmitter, etc.) for flow measurement and indication purposes.

Product features:

  • Low signal-to-noise ratio.
  • Honeycomb airflow straightening section with 1/2" opening by 3" depth.
  • Multiple total and static pressure sensing ports along the length of the element.
  • Factory mounted and pre-piped in a flanged duct section (casing).
  • ±2% accuracy throughout velocity ranges of 100 fpm and over.
  • Standard construction includes galvanised casing and 6063-T5 anodised aluminum flow sensors.
  • Standard airflow stations can be operated (in air) continuously in temperatures up to 350°F or intermittently in temperatures up to 400°F.
  • All airflow stations can be operated in humidity ranges of 0 to 100%.
  • Standard airflow stations have good salt air resistance and are suitable for most HVAC applications.
  • Great for use where turbulent conditions exist.
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