Rheonik RHM80 Coriolis Mass Flow Meter

Rheonik RHM80 Coriolis Mass Flow Meter excels in tough applications where high temperatures, pressures, and corrosive fluids are present. Its heavy duty construction withstands extreme applications without losing Coriolis meter performance.

  • Range: 80 kg/min up to 8000 kg/min
  • Pressure: up to 299 bar (4336 psi)
  • Temperature: -196°C (-321°F) up to +350°C (662°F)
  • Accuracy: 0.1 % of rate
  • Materials: SS 316L / SS 316Ti, Super Duplex – 1.4410, Alloy C22 – 2.4602
  • Process Connection: 6″ up to 6″
Rheonik RHM80 Coriolis Mass Flow Meter


  • Typical measuring range up to 8000 kg/min (17636.98 lb/min)
  • Pressure ratings up to 341 bar (4946 psi)
  • Temperature ratings from -196 to +350 °C (-320 to +662°F)
  • Mass flow uncertainty down to 0.1 %
  • Repeatability down to 0.05 %
  • 4 kHz measurement updates and response time of less than 10 ms when used with RHE 40
    Series transmitters
  • Accurately measure flow rates down to 100 kg/min
  • The Rheonik AnyPipeFit Commitment provides custom process connection type and size
    flexibility on any meter to suit your existing plant, saving time and expense on installation costs
  • Approved for use in hazardous areas
  • SS 304 Stainless steel enclosure, SS 316 optional
  • Integral and remote transmitter versions available

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  • Terminal Transfer / Asphalt
  • Bitumen and other High Temperature Fluids / Viscous Fluid / Barge
  • Ship
  • Rail Car and Truck Filing

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  • Torsion oscillator design assures a stable and drift free measurement with excellent signal to noise ratios
  • Resilient to external noise and vibration
  • Insensitive to pipe pressure changes
  • Robust tube wall thickness provides increased operational safety in abrasive applications
  • Corrosion resistant
  • Long sensor life guaranteed due to low mechanical stresses in the meter mechanism
  • No moving parts to wear or fail

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Performance Data

Flow Measurement Uncertainty
Selected Sensors down to ±0.10 % ¹ of rate (Gold Line)
Standard Sensors down to ±0.15 % ² of rate

Flow Measurement Repeatability
Down to ±0.05 % of rate

Temperature Measurement
Better than ±1 °C

Density Calibration (Liquid)
Selected Sensors down to ±0.0005 kg/liter (Gold Line)
Standard Sensors down to ±0.001 kg/liter 

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Measurement Tube Pressure Ratings

The maximum pressure (pmax) of a sensor is determined by its lowest rated part. The lowest rated part can be either the measurement tube (pmax indicated below), the connection block/manifold
(pmax indicated in the mechanical construction section) or the process connection (for pmax see published standards or manufacturer information).

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Uncertainties and flow measurement turn-down

All uncertainty statements refer to reference conditions – mass flow of water, 18 – 24 °C, 1 – 3 bar in a standard temperature, pressure and material configuration sensor. The sensor can be used to measure gas – uncertainty values for gas equal the liquid value plus 0.3 %. Reference conditions for gas are mass flow of natural gas, 18 – 24 °C, 35 to 100 bar in a standard temperature, pressure and material configuration sensor.

The turn down capability from Qnom of the flow sensor is mainly driven by its zero point stability. At the very low end of the measuring range the uncertainty (u) is dominated by the zero point stability. The zero point stability of a standard sensor is: 0.000036 kg/min (0.000079 lbs/min). Zero stability of a Gold Line sensor is 0.000019 kg/min (0.000042 lbs/min).

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Uncertainties from environmental and process conditions

  • If sensors are not zeroed at operating conditions, minor additional uncertainties can arise from elevated temperatures and pressures:  ±0.00308 % of maximum flow per °C and  ±0.0208 % of maximum flow per bar.
  • Process temperature effect on density: additional uncertainty of ±0.000641 g/cm³ per °C difference from calibration temperature with standard density calibration and of ±0.000073 g/cm³ per °C difference from calibration temperature with enhanced density calibration. This effect can be mitigated by a simple field density adjustment at operating conditions.
  • Process pressure effect on mass flow: The effect of pressure on flow measurement is 0.001 % of rate per bar. Compensation is possible by pressure sensor input (analog input or digital write) or manual value entry into the transmitter.
  • Process pressure effect on density: The effect of pressure on density measurement is 0.00012 g/cc per bar. Compensation is possible by pressure sensor input (analog input or digital write) or manual value entry into the transmitter.

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Rheonik Coriolis Mass Flow Meter RHM80 General Specifications

Nominal Flow (Qₙₒₘ)*

5000 kg/min (11023 lb/min)

Maximum Flow (Qₘₐₓ)*

8000 kg/min (17637 lb/min)

Typical Minimum Flow (Qₘᵢₙ)*

100 kg/min (176 lb/min)

Operating Temperature

Fluid temperature range options cover applications from -196°C to +350°C (-320°F to +662°F). For integral transmitter versions please refer to transmitter datasheet

Ambient Temperature

-50°C to 80°C (-58°F to 176°F)

Pressure Ratings

Up to 341 bar / 4946 psi – dependent upon material

Electrical Connection Sensor
w/o Integral Transmitter

M20 x 1.5 standard cable entry for JM, SM terminal box versions

Optional entries available : ½” NPT or M25 x 1.5 (only for SM) or ¾” NPT (only for SM)

Max. cable length to remote RHE transmitter 100 m / 328 ft

Sensor Enclosure Materials

Stainless steel 304 (standard), SS 316 (optional)

Coated aluminum terminal box, SS 316 terminal box (optional)

Enclosure Type

Protection class IP65, NEMA 4 (standard); IP66 / NEMA 4X (optional)

Wetted Materials

1.4571 (S

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