Introduction
The Rheonik RHM 04 Coriolis Mass Flow Sensor is a high-performance Coriolis mass flow measurement solution engineered for fast-response applications such as batching, dispensing, and precision filling processes. Designed to operate in extreme industrial conditions, the Rheonik RHM 04 offers exceptional measurement stability and accuracy even under very high pressure and wide temperature ranges, enabling reliable deployment in applications where conventional Coriolis meters were previously unsuitable. Its robust construction, combined with advanced sensor design, ensures superior resistance to mechanical stress, aggressive media, and process fluctuations, making it ideal for critical process industries requiring high precision and repeatability. The sensor supports a wide range of materials to accommodate corrosive and high-purity applications, while its compact design allows seamless integration into complex systems with limited installation space.
- Flow Range: 0.05 kg/min up to 18 kg/min, optimized for low to moderate flow precision applications
- Pressure Rating: Up to 1401 bar (20319 psi), suitable for extremely high-pressure processes
- Operating Temperature: From -196°C (-321°F) to +350°C (662°F), enabling cryogenic to high-temperature operations
- Accuracy: ±0.1% of rate, ensuring high-precision mass flow measurement and repeatability
- Material Options: SS 316L / SS 316Ti, Super Duplex (1.4410), Sandvik HP160, Alloy C22 (2.4602) for enhanced corrosion resistance
- Process Connections: ¼” up to 1″, providing flexibility for integration into various piping configurations
General Specification
| Nominal Flow (Qnom)* | 12 kg/min (26.46 lb/min) |
| Maximum Flow (Qmax)* | 18 kg/min (39.68 lb/min) |
| Typical Minimum Flow (Qmin)* | 0.06 kg/min (0.13 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). High temperature version for oven installation up to +210°C (+410°F) available |
| Pressure Ratings | Up to 1401 bar / 20319.79 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, Sandvik HP160 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 (see page 19) |
| 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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