| Item | Details |
|---|---|
| Manufacturer | Yokogawa |
| Product family | ROTAMASS Total Insight |
| Specific model | ROTAMASS Supreme |
| Product category | Coriolis mass-flow and density meter |
| Available sizes | Supreme 34, 36, 38 and 39 |
| Measured variables | Mass flow, density and temperature |
| Calculated variables | Volume flow, concentration and component flow |
Product Overview
The Yokogawa ROTAMASS Supreme is a high-accuracy Coriolis flowmeter designed for demanding liquid and gas measurement applications.
It directly measures mass flow, fluid density and temperature without relying on pressure or temperature compensation. The transmitter can also calculate volume flow, reference density, concentration and individual component flow.
Its robust dual-tube sensor is designed to reduce the influence of external vibration, piping stress and process-pressure changes. Versions are available for cryogenic liquids, high-temperature fluids, fuel oil, chemicals, gases and abrasive media.
Working Principle
The meter’s measuring tubes are vibrated at their natural frequency. When fluid passes through the vibrating tubes, Coriolis forces create a phase difference between the inlet and outlet sections.
This phase difference is proportional to mass flow. The tube vibration frequency provides density measurement, while an integrated temperature sensor measures the process temperature.
Since there are no moving measuring components, mechanical wear is substantially lower than with turbine or positive-displacement meters.
Main Features
- Direct mass-flow measurement
- High-accuracy liquid and gas measurement
- Simultaneous density and temperature measurement
- No moving internal measurement parts
- Bidirectional flow measurement
- Robust dual-bent measuring tubes
- Strong resistance to external vibration and piping stress
- Meter verification through Tube Health Check
- Measurement of liquids containing entrained gas
- Gas Void Fraction calculation
- Net Oil Computing functionality
- Concentration measurement
- Batch and totalizer functions
- Integral or remote transmitter
- Cryogenic and high-temperature versions
- Marine and hazardous-area approvals
- HART, Modbus, PROFIBUS PA and FOUNDATION Fieldbus options
Available Sizes and Flow Capacity
| Model | Typical connection | Nominal flow | Maximum flow |
|---|---|---|---|
| Supreme 34 | DN15/½ inch | 3 t/h | 5 t/h |
| Supreme 36 | DN25/1 inch | 10 t/h | 17 t/h |
| Supreme 38 | DN40/1½ inch | 32 t/h | 50 t/h |
| Supreme 39 | DN80/3 inch | 100 t/h | 170 t/h |
The nominal figures are based on water at 20°C and approximately 1 bar pressure loss. Actual sizing must consider fluid density, viscosity, temperature, pressure and permitted pressure loss.
Measurement Performance
| Measurement | Essential transmitter | Ultimate transmitter |
|---|---|---|
| Liquid mass-flow accuracy | Up to ±0.15% | Up to ±0.10% |
| Liquid mass-flow repeatability | ±0.08% | ±0.05% |
| Water volume-flow accuracy | Approximately ±0.43% | Approximately ±0.12% |
| Liquid-density accuracy | Down to ±4 g/L | Down to ±0.5 g/L |
| Temperature accuracy | ±0.5°C | ±0.5°C |
| Gas mass-flow accuracy | Up to ±0.75% | Up to ±0.35% |
| Gas-flow repeatability | ±0.60% | ±0.28% |
Performance depends on the selected model, calibration, transmitter type, flow rate and operating conditions.
Temperature Range
| Configuration | Process-temperature range |
|---|---|
| Standard integral type | –50°C to +150°C |
| Standard remote type | –70°C to +150°C |
| Low-temperature version | –196°C to +150°C |
| Medium-temperature version | –70°C to +230°C |
| High-temperature version | 0°C to +350°C |
This range supports cryogenic liquids, normal process fluids, heated fuel oils, thermal oils and molten or highly viscous products.
Technical Specifications
| Specification | Details |
|---|---|
| Density measuring range | Up to 0–5 kg/L, depending on size |
| Liquid mass-flow capacity | Up to 170 t/h |
| Wetted materials | 316L stainless steel or Nickel Alloy C-22 |
| Optional wetted material | 304L stainless steel on selected versions |
| Process connections | ASME, EN, JIS and hygienic connections |
| Flange ratings | Class 150, 300 and 600; PN40, PN63 and PN100 options |
| Outputs | 4–20 mA, pulse, frequency, status and configurable I/O |
| Digital protocols | HART, Modbus, PROFIBUS PA and FOUNDATION Fieldbus |
| Transmitter options | Essential or Ultimate |
| Mounting | Integral or remote |
| Installation orientation | Horizontal, vertical or inclined |
| Straight pipe requirement | Normally not required |
| Functional safety | SIL 2 with HFT=0; SIL 3 with HFT=1 |
| Hazardous-area approvals | ATEX, IECEx and FM configurations |
| Custody-transfer option | NTEP option available |
Maximum process pressure depends on the flange rating, process connection, temperature and selected model.
Transmitter Options
Essential Transmitter
- Standard measurement functions
- HART communication
- Modbus communication
- Local indication
- Configurable analogue and pulse outputs
- Suitable for general flow measurement
Ultimate Transmitter
- Higher measurement accuracy
- Advanced diagnostics
- Concentration measurement
- Net Oil Computing
- Gas Void Fraction functions
- HART and Modbus
- PROFIBUS PA option
- FOUNDATION Fieldbus option
- Expanded input and output configurations
Marine Approvals
Selected ROTAMASS Supreme configurations are available with:
- DNV type approval
- EU Recognized Organization Mutual Recognition
- Korean Register marine approval
- ABS product-design assessment
- Lloyd’s Register marine approval
- IMO Material Declaration and ship-recycling compliance
The required marine approval must be specified in the ordering code. Approval-related pressure and temperature limitations may apply.
Marine and Offshore Applications
- Main-engine fuel-consumption measurement
- Auxiliary-engine fuel monitoring
- Boiler fuel-flow measurement
- Fuel-oil transfer systems
- Bunker receiving and delivery
- Fuel blending and changeover systems
- Lubricating-oil measurement
- Thermal-oil circulation
- LNG and cryogenic-liquid measurement
- Methanol and alternative marine fuels
- Chemical and additive dosing
- Offshore production skids
- Produced-water monitoring
- Oil, water and gas stream calculation
- Cargo and terminal metering systems
Installation Requirements
- The measuring tubes must remain completely filled.
- For liquids, avoid installing the sensor at the highest point of the pipeline.
- For gases, avoid installation at the lowest point where condensate may collect.
- Vertical installation with upward flow is generally recommended.
- Pipe supports should prevent excessive mechanical stress.
- Cavitation and flashing must be avoided.
- Actual pressure loss should be calculated before selection.
- Straight inlet and outlet runs are normally unnecessary.
Availability and Replacement Status
ROTAMASS Supreme is an active Yokogawa product range.
It can be used to replace certain discontinued ROTAMASS 3 Series meters, but replacement requires technical sizing. Sensor dimensions, flow capacity, process connection, transmitter outputs and existing cabling must be reviewed.
Typical supply options include:
- Complete integral flowmeter
- Remote sensor and transmitter
- Essential transmitter
- Ultimate transmitter
- Interconnection cable
- Heat-traced sensor
- Insulated sensor
- Hazardous-area version
- Marine-approved configuration
