Introduction
The Rheonik RHM 02 Coriolis Mass Flow Sensor is a high-precision Coriolis mass flow measurement solution engineered for low-flow applications requiring exceptional accuracy, reliability, and operational robustness under extreme process conditions. Designed with a wide range of wetted material options, the sensor ensures full compatibility with aggressive, corrosive, and high-purity media across various industrial sectors, including chemical processing, oil & gas, and advanced manufacturing. Its compact design, combined with industry-leading pressure and temperature ratings, enables stable performance in demanding environments where conventional flow technologies are limited. The RHM 02 delivers highly accurate mass flow measurement with excellent repeatability, making it ideal for critical dosing, metering, and process control applications where precision is essential.
- Flow Range: 0.01 kg/min up to 2.7 kg/min for ultra-low flow measurement applications
- Maximum Pressure Rating: up to 1436 bar (20,827 psi) for high-pressure process environments
- Operating Temperature Range: -196°C (-321°F) up to +210°C (+410°F) for extreme thermal conditions
- Measurement Accuracy: ±0.1% of rate, ensuring high precision and repeatability
- Wetted Materials: SS 316L / SS 316Ti, Super Duplex (1.4410), Alloy C22 (2.4602) for superior corrosion resistance
- Process Connections: Available from ¼” up to 1″ to suit a wide range of installation requirements
General Specification
| Nominal Flow (Qnom)* | 1.8 kg/min (1.32 lb/min) |
| Maximum Flow (Qmax)* | 2.7 kg/min (2.65 lb/min) |
| Typical Minimum Flow (Qmin)* | 0.01 kg/min (0.02 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 | 1436 bar (20827 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 316 L 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 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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