Rheonik RHM 40 Flow Sensor
The RHM 40 Coriolis sensor offers a low pressure drop and exceptional turndown capability. Designed for general process applications, the RHM 40 is available with a choice of materials and the highest pressure ratings.
- Range: 20 kg/min up to 1500 kg/min
- Pressure: up to 380 bar (5511 psi)
- Temperature: -196°C (-321°F) up to +350°C (662°F)
- Accuracy: 0.1 % of rate
- Materials: SS 316L / SS 316Ti, Alloy C22 – 2.4602, Super Duplex – 1.4410
- Process Connection: 2″ up to 3″
| MFG Part Number | RHM-40 |
| Stock | Limited |
General Specifications
| Nominal Flow (Qnom)* | 1200 kg/min (2645.6 lb/min) |
| Maximum Flow (Qmax)* | 1500 kg/min (3306.9 lb/min) |
| Typical Minimum Flow (Qmin)* | 20 kg/min (44.1 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 applications from -196°C to +350°C (-320°F to +662°F). For integral transmitter versions please refer to transmitter datasheet |
| Ambient Temperature | -50°C to +80°C (-60°F to +180°F) (standard) |
| Pressure Ratings | Up to 433 bar / 6280 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 (standard), IP66/67, NEMA 4X/6 (optional) |
| Wetted Materials |
1.4571 (SS 316Ti), 1.4410 (SuperDuplex), 2.4602 (Alloy C22) – standard |
| 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 |
Europe – PED: Module A2, Module B3.1+C2 |
| Certifications and Approvals |
ATEX / IECEx Approvals for Zone 0, 1, 2 (details see pace 12) |
| 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 |
* At Qnom pressure drop across a parallel tube sensor will be approximately 0.75 bar (10.1 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.