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Rheonik RHM 20 Medium Coriolis Flow Meter

  • Measures flow rates between 3kg/min up to 300kg/min
  • Able to operate at high pressures with a pressure rating of up to 799 bar.
  • Highly accurate measurements at 0.15% mass flow uncertainty and 0.05% repeatability.


The RHM20 from Rheonik offers accurate measurements to 0.15% mass flow uncertainty from a wide range of mass flow in-between 3Kg/min up to 300Kg/min.

Temperature and pressure ranges

A wide temperature rating from -196°C to 350°C means that the RHM20 can be used for an array of applications such as general flow control, plant balance and package and container filling. High pressure ratings of up to 799 bar mean that it can be used for more extreme applications.

The unique torsion oscillator design means that the RHM20 is very robust with a long lifetime as there are no moving parts to fail. It also means that the measurements are even more accurate due to their resilience from noise and vibration.


Meters can be fitted from a selection of wetted materials such as 316Ti, Alloy C22, Tantalum and Superduplex. Seals are manufactured out of PTFE.

Sensors are enclosed in stainless steel as standard, and the terminal box is constructed with epoxy coated aluminium also as standard. 316 stainless steel terminal and enclosure are an option.


The RHM20 is approved for use in hazardous zones. It has been approved by ATEX/IECEx in zones 0, 1, 2. North American Approvals have also been granted for Class I, div.1 and Groups ABCD.


  • Measures mass flow rate with the ranges 3Kg/min to 300kg/min at an uncertainty of 0.15%.
  • Operates at a pressure rating of up to 799 bar and with the fluid temperatures of -196°C and 350°C.
  • Density uncertainty at around 0.5% with a repeatability that is lower than 0.05%
  • Stainless steel enclosure as standard but can be produced as 316 stainless steel.
  • Epoxy coated aluminium terminal box as standard, 316 stainless steel terminal box is an option.
  • Enclosures come as standard as protection class IP65. IP66/NEMA 4X are available as an option.
  • Wetted materials can be 316Ti, Alloy C22, Tantalum, SuperDuplex. Seals are PTFE.
  • ATEX/IECEx Approvals for zone 0, 1, 2. North American Approvals for Class I, div. 1 and Groups ABCD. Approval for use on marine vessels given by American Bureau of Shipping.
  • All sensors when they have been calibrated come with a calibration certificate and have been hydro tested.

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