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Air Velocity Measurement Basics

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EE75 Industrial Air Velocity Transmitter

EE75 – Duct Mount

EE75 – Remote Probe

EE75 Remote High Pressure Probe

EE75 – Extended Probe


The EE75 series air velocity transmitters are designed to provide accurate measuring results over a wide range of air velocities and temperatures. The EE75 utilizes a high-quality heated sensor element based on cutting- edge thin film technology ensures maximum sensitivity, even at lowest mass flows.  At the same time, the innovative probe design produces reliable measuring results at high flow velocities of up to 40m/s (8000ft/min). The EE75 also integrate a built in temperature compensation.  It is built with a robust mechanical design, allows it to be used at process temperatures between -40 to +120°C (-40 to 248°F).

In addition to air velocity and temperature values, the transmitter calculates the volumetric flow rate in m³/h or ft³/min. The cross section of the duct needs to be determined for this purpose and the volumetric flow rate can be displayed and directed to one of the analogue outputs.

The EE75 series can be used to measure the velocity of other gases as well, although a correction has to be applied to the unit at the factory.


  • Airflow measurement in industrial environments
  • Wind tunnels & climate simulators
  • Mass Flow In Incineration Processes
  • Monitoring of compressed air systems
  • Air conveyer systems
  • Exhaust monitoring in pharmaceutical and semiconductor industries.

Key Features

  • Measurement range of 0-8,000 fp, (0 – 40 m/s
  • Temperature range -40 to 248ºF (-40 to 120ºC)
  • Operates in pressures up to 145 psi (10 bar)
  • Measures Temp, air velocity and calculate volume flow rate
  • Wide range of angular dependence in mounting for accurate airflow reading
  • Built in correction for pressure, humidity and air media
  • Probe diameter of 0.0” (8 mm)
  • Remote probe cable up- to 40 ft (10 m)


Model EE75


Key Specifications

  • Air Velocity Measurement Range:           
    • 0...2m/s (0...400ft/min)
    • 0...10m/s (0...2000ft/min)
    • 0...40m/s (0...8000ft/min)
  • Temperature Measurement Range: -40...120°C (-40...248°F)
  • Response time:  < 1.5s...40s (can be configured)
  • Outputs: freely scaleable in the ranges of 0...10V and 0...20mA (e.g. 4...20mA)
  • Accuracy:
    • +/-0.05m/s (+/10ft/min)
    • +/-0.1m/s (+/20ft/min)
    • +/-0.2m/s (+/40ft/min)
    • +/-0.5°C (+/0.9°F)
  • Power Supply:            24V AC/DC
  • Operating range:  0...40m/s (0...8000ft/min), -40...120°C (-40...248°F),
  • pressure-tight models up to max. 145 PSI  (10 bar)


Datasheet Manual


Published: February 16, 2004 Last Updated: May 21, 2013