The principle of measurement is based on the fact that a vane wheel rotates at a speed proportional to the flow velocity of a fluid into which it is immersed. The rotational speed is almost independent of density, pressure and temperature of the medium. The sensing of the vane wheel rotation is by means of a proximity switch without the slightest braking effect on the vane wheel. By fitting a further proximity switch, sensing of the direction of the vane wheel rotation and the indication of the +/-direction of flow is made possible. Determined by its light weight, the vane wheel rotational speed adapts in milliseconds to velocity increases, even when being used in gases. All vane wheel flow sensors are calibrated on the same frequency, so that sensors of the same type are interchangeable.
Main areas of application
stationary measurement in unpolluted gases, control measurement in particle laden gases
Measuring ranges in stages
Maximum working pressure above atmospheric
1 MPa /10 bar
Working temperature range
-40 °C...+550 °C
Temperature measuring range
Ex-protective system zone 1
EEx ia IIC T6
Ex-protective system zone 0
Ex-Schutzart Zone 20 / Kategorie 1D
Materials which come into contact with mediums
aluminium, stainless steel, titanium, ...
Smallest necessary insertion opening
Smallest measuring tube inside diameter
Sensor with directional sensing
Sensor with integrated temperature sensor
|FA Messrohr 18,2 240|
Vane Wheel Measuring Tube 18.2 mm up to 240 °CVane wheel measuring tube with inside diameter 18.2 m...
|FA Messrohr 18,2 100|
Vane Wheel Measuring Tube 18.2 mm up to 100 °C Vane wheel measuring tube with inside diameter 18.2 ...
|FA Messrohr 9,7 100|
Vane Wheel Measuring Tube 9.7 mm up to 100 °CVane wheel measuring tube with inside diameter 9.7 mm ...
|FA Messrohr 9,7 240|
Vane Wheel Measuring Tube 9.7 mm up to 240 °C Vane wheel measuring tube with inside diameter 9.7 mm...