Twin Lobe Positive Displacement Flowmeters


Twin Lube Flow meters belong to the group of Positive displacement Flow meters. The SMOOTH Flowmeter consists of two precisely machined rotating units known as Twin Lobe Rotors which rotate and mesh within the meter’s interior housing.

These form a measuring chamber of known volume which may be used to accurately determine volumetric Flow rate as a function of the rotors’ velocity. The low friction lobes are mounted inside the housing by using ball bearings. Liquid Flow causes the rotor to rotate and passes through the device in an axial direction. In so doing, self-contained part volumes are formed which are continuously lled and emptied.

This principle of measurement causes no pressure and/or Flow pulsations. A sensing wheel attached to the measuring rotor is scanned by one non-contact sensor. All moving parts are lubricated by the measurement medium.



  • Measurement Accuracy of ±0.5% of measured value. Repeatability ±0.05%. Sizes ½“ to 3”.
  • Modular meter design for wide range of ?ow sensors, displays, pulses & ?lling controls.
  • Pneumetic or electronic ?lling controls.
  • Version for Intrinsic safe, Exproof applications.
  • Meter mounted & remote displays.
  • A unique Twin Lobe Flow meter design.
  • Rugged Design & Reliable Functions.
  • Complete tailor made solutions to meet requirements.


  • Low total cost of ownership.
  • Flexible mounting with small space requirement.
  • Suitable for conductive as well as non conductive media.
  • No need of straight inlet & outlet pipelength.
  • Easy to install in horizontal,vertical & inclined pipes.
  • Long term accuracy without calibration.
  • Minimum pressure loss.
  • Unaffected by ?ow Turbulance.
  • Easy to read Displays.
  • Modular meter concept with various output options.
  • Flow meter measures independent of ?ow direction.
  • Versions with Te?on coated internals for corrosive applications.
  • Versions with Sanitary end connections and internals.