helical screw flow meter / for liquids / high-temperature / high-accuracy
RS series



  • Technology:

    helical screw

  • Fluid:

    for liquids

  • Other characteristics:

    high-accuracy, high-temperature

  • Applications:

    for hydraulic applications

  • Process pressure:

    Max.: 450 bar (6,526.7 psi)

    Min.: 0 bar (0 psi)

  • Process temperature:

    Max.: 200 °C (392 °F)

    Min.: -40 °C (-40 °F)

  • Volumetric flow rate:

    Max.: 3,000 l/min (792.5 us gal/min)

    Min.: 0 l/min (0 us gal/min)


Whether low viscosity oil or viscous resin - RS flow meters are the ideal solution for precise flow measurement. Thanks to various bearings, tolerances, materials, coatings, electronics and resolutions, VSE finds the right solution also for challenging applications. An optional high temperature pick-up system means that the RS can also be used in extreme temperature zones.

Performance data

Flow range 0 to 3000 l/min
Pressure range up to 450 bar
Temperature range -30 to +120°C (-40 to +200°C with high temperature sensor system)
Frequency range up to 100 kHz
Viscosity range 1 to 1,000,000 cSt


Process technology
High viscosity, paste-like, abrasive adhesive and sealing substances

RS flow meters measure the flow rate based on the
screw pump principle. A pair of rotors fitted precisely
into the housing constitutes the measuring element. An
integrated gear and non-contact signal pick-up system
detects the rotations of the measuring element and
converts them to digital pulses.

Together with the housing walls, the rotor edges form
closed measuring chambers in which the fluid is transported
from the inlet to the outlet side.

The fluid volume put through within one main rotor
rotation is the rotation volume, which is divided by the
sensing gear and digitised, processed and output in
the sensor module.

High degree of precision that is mostly independent of viscosity
Pulsation-free measurement with minimal shear
Lowest pressure losses
Short response time due to innovative rotor profile and reduced mass
Highest functionality due to intelligent sensor technology