Introduction
The Rheonik RHM 60 Coriolis Mass Flow Sensor is a high-performance, heavy-duty Coriolis mass flow sensor engineered for demanding industrial applications with 4″ line sizes, delivering precise and reliable measurement of mass flow, density, and temperature under extreme operating conditions. Designed with a robust mechanical structure and optimized flow geometry, the RHM 60 ensures exceptional measurement stability and repeatability even in high-pressure and high-temperature environments. Its wide selection of wetted materials enables compatibility with aggressive, corrosive, and high-purity media, making it suitable for critical processes across oil & gas, chemical processing, energy, and heavy industrial sectors. With industry-leading accuracy and broad operational limits, the RHM 60 supports advanced process control, custody transfer, and safety-critical monitoring applications while maintaining long-term operational reliability and minimal maintenance requirements.
- Flow Range: 30 kg/min up to 3000 kg/min
- Pressure Rating: Up to 490 bar (7106 psi)
- Temperature Range: -196°C (-321°F) up to +350°C (662°F)
- Measurement Accuracy: ±0.1% of rate
- Wetted Materials: SS 316L / SS 316Ti, Super Duplex (1.4410), Alloy C22 (2.4602)
- Process Connection: 4″ up to 4″
General Specifications
| Nominal Flow (Qnom)* | 2500 kg/min (5512 lb/min) |
| Maximum Flow (Qmax)* | 3000 kg/min (6614 lb/min) |
| Typical Minimum Flow (Qmin)* | 30 kg/min (66 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 the transmitter datasheet |
| Ambient Temperature | -50°C to +80°C (-60°F to +180°F) (standard) |
| Pressure Ratings | Up to 490 bar / 7107 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 IP66 / NEMA 4X with Standard Temperature Range (Option N1/NA); IP65 / NEMA 4 for Extended Temperature Ranges (Option E2 / E3 / H4) |
| Wetted Materials |
1.4571 (SS 316Ti), 1.4410 (SuperDuplex) – standard |
| Process Connections | Nearly any – the Rheonik AnyPipeFit Commitment. Consult the factory for types/sizes not listed |
| Pressure Rating Compliance |
Europe – PED: Module A2, Module B3.1+C2 |
| Certifications and Approvals |
ATEX / IECEx Approvals for Zone 0, 1 (details see page 10) |
| 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 |
Enclosure heating for high temperature applications |
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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