Rheonik RHM 03 Flow Sensor
The RHM 03 is available with a wide selection of wetted materials and the highest pressure and temperature ratings in the market. It is suitable for all low flow applications where high accuracy is a must.
- Range: 0.03 kg/min up to 7.5 kg/min
- Pressure: up to 1311 bar (19014 psi)
- Temperature: -196°C (-321°F) up to +210°C (410°F)
- Accuracy: 0.1 % of rate
- Materials: SS 316L / SS 316Ti, Super Duplex – 1.4410, Alloy C22 – 2.4602
- Process Connection: ¼” up to 1″
| MFG Part Number | RHM-03 |
| Stock | Limited |
General Specifications
| Nominal Flow (Qnom)* | 5 kg/min (11 lb/min) |
| Maximum Flow (Qmax)* | 7.5 kg/min (16.5 lb/min) |
| Typical Minimum Flow (Qmin)* | 0.04 kg/min (0.88 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 +350°C (+662°F) available |
| Pressure Ratings | Up to 1311 bar / 19014.45 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 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 |
* At Qnom pressure drop across a parallel tube sensor will be approximately 2 bar (29 psi) for H2O. Sensors can be operated at higher flow rates up to Qmax but pressure drop will be higher. Typical Minimum Flow Qmin is the recommended lowest flow rate for an accurate measurement. Sensors will measure flow rates lower than Qmin but uncertainty will increase beyond 1 % of rate.
The flow rate specifications above relate to standard pressure, parallel tube, manifold sensor versions. Models with higher pressure ratings have increased wall thickness and will have higher pressure drops.
Pressure Drop
At Qnom, 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 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 rate.
The flow specifications above relate to standard pressure, parallel tube, manifold sensor versions. Models with higher pressure ratings have increased wall thickness and will have higher pressure drops.