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Turbine Flow meter

Principles of Operation

A turbine flowmeter consists of a rotor mounted on a bearing and shaft in a housing. The fluid to be measured in passed through the housing, causing the rotor to spin with a rotational speed proportional to the velocity of the flowing fluid within the meter. A device to measure the speed of the rotor is employed to make the actual flow measurement. The sensor can be a mechanically gear-driven shaft to a meter or an electronic sensor that detects the passage of each rotor blade gen- erating a pulse. The rotational speed of the sensor shaft and the frequency of the pulses is proportional to the volumetric flow rate through the meter. 


Consisting of three component assemblies, fitted inside a stainless-steel body (locked with retaining rings), which has a Pickup (variable reluctance sensor) fitted and come in a range of threaded, flanged and tri clamp styles.
The Rotor and shaft assembly (1 off) which is mounted in sleeve bearings, fitted inside Support assemblies (2 off) is turned by the kinetic energy of the flowing guild at an angular velocity, which in the linear range of the Flowmeter is proportional to the mean axial velocity of the fluid.
The Rotor blades sweep out the full bore of the flowmeter except for a small tip clearance space. As the blade tips pass the magnetic Pick Up (through the housing wall) they initiate pulse. Flow rate is determined by the frequency of the pulses and Totalised Flow is obtained by summation of the pulsing electrical signal.


  • Working Temperature: – 50ºC to + 282ºC
  • Accuracy: + / -0.5% of reading overflow Range
  • Repeatability: + / – 0.15% of reading
  • Pressure Drop: Less than 0.5 bar at Maximum Flow
  • Materials: All 316 Stainless Steel with ANC1A Rotor
  • Bearings: Wear Resistant Tungsten Carbide Sleeve
  • Pick Up: The Lx variable reluctance sensor is hermetically sealed for resistance to moisture and can withstand repeated thermocycling. The magnet is resistant to demagnetization. 
  • Output: low-level signal that ranges from 10 mV to 1 V peak to peak. A screened twin core signal cable should be used for connection to the Pick Up.

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HM Turbine Flow meter

Anderson-Negele’s HM-series turbine flow meter is the solution for applications requiring an economical, accurate flow meter. Using the proven method of counting the rotation of

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