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Piston flow meters


Fields of use

  • Mechanical engineering
  • Plant engineering


Short-tube variable area flow meters are suitable for the measurement of small and low flow rates and are available in different types, e.g. with valve and limit switches.


  • water
  • oil
  • other fluids

Operating principle

The SKM device is equipped with a spring-loaded piston located in a cylindrical measuring tube made of borosilicate glass. The piston with orifice bore forms the measuring system together with the spring. When the flow passes through the SKM, the piston changes its position in proportion to the flow rate. The flow rate is read directly at the upper edge of the piston on a scale on the glass. The SKM can be installed in horizontal and vertical pipework.


Kirchner und Tochter offers a wide range of well approved methods of flow measurement.

Variable area flow meters
Piston flow meters
Flap-type flow meters
Differential pressure flow meters
Bypass flow meters
Level indicators
Sight glasses
Electrical accessory equipment