Measurement Probes – HK Instruments FloXact™ Series


  • Multi-point averaging based on the “Log-Tchebycheff“ method, providing greater accuracy
  • Chamfered sensing points ensure consistent readings
  • Easy installation in existing air ducts or terminals
  • 2% accuracy
  • 2.5 times linear amplification of Velocity Pressure
  • Accepts 1/4” OD tubing

FloXact measurement probes

These probes offer exceptional usability and accuracy. The accuracy of the probe is based on special design of the probe which eliminates the measurement value dependence on air velocity.


The FloXact probe is a differential air pressure device designed to measure air velocities in a duct. It includes multiple sensing points to measure total and static pressures. The FloXact probe incorporates a unique design to amplify the differential pressure by approximately 2.5 times for accurate measurement of lower air velocities down to 1.0 m/s (200 fpm). It is easy to install and cost-effective.


Accuracy ±2.0 %
Measurement units l/s
Environment Operating temperature: 5…95 °C
Storage temperature: -20…95 °C
Humidity: 0 to 95 % rH, non condensing
Lenghts Round: All standard round duct sizes up to 1200 mm. (100, 125, 160, 200, 250, 315, 400, 450…1200 mm)
Rectangular: 250, 300… 1200 (50 mm steps)
Additional lengths available on request.
Round: 4”, 5”, 6”, 7”, 8”, 9”, 10”, 12”, additional sizes to 48” in 2” increments
Rectangular: 4”, 5”, 6”, 7”, 8”, 9”, 10”, 12”, additional sizes to 48” in 2” increments
Additional lengths available.
Mounting 2 each 5.0 mm screw holes. Lenghts 350 mm and greater include 6 mm stud, washer and nut to secure opposite end of the probe.


HK Instruments FloXact™ Series Measurement Probes-DpstarGroup


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