Introduction
The Rheonik RHM 06 Coriolis Mass Flow Sensor is a high-precision Coriolis mass flow measurement solution engineered for critical process applications requiring exceptional accuracy, reliability, and long-term operational stability. Designed as a low-risk and low-maintenance instrument, it delivers consistent performance under extreme process conditions, making it an ideal “fit-and-forget” device for demanding industrial environments. The sensor supports high-pressure and high-temperature operations, while offering a wide selection of wetted materials to ensure full compatibility with aggressive, corrosive, and high-purity media. Its robust mechanical construction, combined with advanced signal processing, enables precise mass flow measurement with minimal drift, reduced recalibration requirements, and enhanced process control. The Rheonik RHM 06 is particularly suited for industries such as oil & gas, chemical processing, power generation, and other applications where measurement integrity and system reliability are critical.
- Flow Range: 0.1 kg/min up to 36 kg/min, suitable for low to medium flow applications with high accuracy requirements
- Pressure Rating: Up to 1662 bar (24,105 psi), enabling operation in ultra-high-pressure systems
- Temperature Range: -196°C (-321°F) up to +350°C (662°F), supporting cryogenic to high-temperature processes
- Measurement Accuracy: ±0.1% of rate, ensuring precise and repeatable flow measurement performance
- Wetted Materials: SS 316L / SS 316Ti, Super Duplex (1.4410), Alloy C22 (2.4602) for superior corrosion resistance and process compatibility
- Process Connections: ½” up to 1″, providing flexible integration into various piping configurations
General Specification
| Nominal Flow (Qnom)* | 25 kg/min (55.1 lb/min) |
| Maximum Flow (Qmax)* | 36 kg/min (79.4 lb/min) |
| Typical Minimum Flow (Qmin)* | 0.1 kg/min (0.22 lb/min) |
| Serial Tube / Single Path | Flow rates Qmax, Qnom and Qmin for “serial” sensors will be 50% of the above-listed parallel/dual path version. |
| Operating Temperature |
Fluid temperature range options cover from -196°C to +210°C (-320°F to +410°F) |
| Ambient Temperature | -50°C to +80°C (-60°F to +180°F) (standard), versions available for installation in a vacuum chamber (-260°C / -430°F) or oven (up to +210°C / +410°F) (optional) |
| Pressure Ratings | Up to 1379 bar / 20000 psi – dependent upon material |
| Electrical Connection Sensor w/o Integral Transmitter |
M20 x 1.5 standard cable entry for JM, SM terminal box versions |
| Sensor Enclosure Materials |
Stainless steel 304 (standard), SS 316 (optional) |
| Enclosure Type | Protection class IP 66, NEMA 4 (standard), IP 66/67, NEMA 4X (optional) |
| Wetted Materials |
Flow tubes SS 316L or SuperDuplex |
| Process Connections | Nearly any – the Rheonik AnyPipeFit Commitment. Consult the factory for types/sizes not listed in this data sheet on the Mechanical Construction pages |
| Pressure Rating Compliance | PED 2014/68/EU Article 4, Section 3 (SEP) |
| Certifications and Approvals |
ATEX / IECEx Approvals Zone 0, 1, 2 (details see page 18) |
| Testing and Inspection | All sensors are hydro tested, calibrated and supplied with a traceable calibration certificate. Customized calibration and testing services are available |
| Project Documentation and QA, Services |
Rheonik offers a full set of services for large and complex engineering projects.
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| Options | Customization services for machine integration. Consult factory |
Pressure Drop
At Qnom, the pressure drop across a parallel tube sensor will be approximately 1-3 bar (15-44 psi) for H2O. Sensors can be operated at higher flow rates, but the pressure drop will be higher. Qmin is the recommended lowest flow rate. Sensors will measure flow rates lower than Qmin, but uncertainty will increase beyond 0.5 % of the rate.
The flow specifications above relate to standard pressure, parallel tube, and manifold sensor versions. Models with higher pressure ratings have increased wall thickness and will have higher pressure drops.
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