Liquid Flow Meters

Positive Displacement Flow Meters

Nutating Disc

Liquid enters a precision-machined measuring chamber containing a disc which nutates (wobbles). The measuring chamber contains an exact known quantity of fluid. Fluid pressure causes the disc to nutate and the control roller causes the nutating disc to make a complete cycle. The measuring chamber is filled and emptied each cycle. The nutations of the disc are transmitted by a gear train to a totalizer or pulse transmitter.

Close machined tolerances between the disc and chamber ensure minimum leakage for accurate and repeatable measurement of each volume cycle.

  • Eliminates upstream and downstream straight run piping requirements
  • Power not required for mechanical version
  • Tolerant of foreign particles
  • Mechanical totalizers and pulse transmitter

Oscillating Piston

Liquid enters a precision-machined measuring chamber containing a piston which oscillates (rotates). The measuring chamber contains an exact known quantity of fluid. Fluid pressure causes the piston to oscillate at its center hub. The measuring chamber is filled and emptied each cycle. The oscillations of the piston are transmitted through the meter wall by a follower magnet to a totalizer or pulse transmitter.

Close machined tolerances between the piston and the chamber ensure minimum leakage for highly accurate and repeatable measurement of each volume cycle.

  • Eliminates upstream and downstream straight run piping requirements
  • Power not required for mechanical version
  • Standard 316 SS/ETFE allows user flexibility with different fluids
  • Mechanical totalizers & pulse transmitters

Niagara Meters Series

  • SmartPD_Nutating Disc

    Positive Displacement Nutating Disc

    Liquid enters a precision-machined chamber containing a disc which nutates (wobbles). The measuring chamber contains an exact known quantity of fluid.  The nutations of the disc are transmitted by a gear train to a totalizer or pulse transmitter.

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  • Positive Displacement Oscillating Piston

    Positive Displacement Oscillating Piston

    Liquid enters a precision-machined measuring chamber containing a piston which oscillates (rotates) in the SmartPD Positive Displacement meter. The oscillations of the piston are transmitted through the meter wall by a follower magnet to a totalizer or pulse transmitter.

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  • SmartPD_Nutating Disc

    SmartPD Meter Nutating Disc

    The SmartPD positive displacement meter is a volumetric meter that provides total volume and flow rate measurements by way of an electronic transmitter adding closed loop control to your system.

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  • SmartPD_Oscillating Piston

    SmartPD Meter Oscillating Piston

    The SmartPD is a volumetric flow meter that provides total volume and flow rate measurements by way of an electronic transmitter adding closed loop control to your system.

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