RHM 015


The RHM 015 Coriolis sensors offers solutions for the lowest flow rates – for flow control, batching and injections up the highest pressures in industry. Small, compact and highest performance.

  • Range: 0.002 kg/min up to 1.2 kg/min
  • Pressure: up to 1481 bar (21480 psi)
  • Temperature: -196°C (-321°F) up to +210°C (410°F)
  • Accuracy: 0.1 % of rate
  • Materials: SS 316L / SS 316Ti, Alloy C22 – 2.4602, Super Duplex – 1.4410, Sandvik HP160
  • Process Connection: ¼" up to 1"
CATEGORY Small Size Sensors, Chemical Injection, Oil Measurement

General Specifications

Nominal Flow (Qₙₒₘ)*

0.6 kg/min (1.32 lb/min)

Maximum Flow (Qₘₐₓ)*

1.2 kg/min (2.65 lb/min) 

Typical Minimum Flow (Qₘᵢₙ)*

0.002 kg/min (0.004 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)
For integral transmitter versions please refer to transmitter datasheet 

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

1481 bar (21480 psi) – dependent upon material

Electrical Connection Sensor
w/o Integral Transmitter

M20 x 1.5 standard cable entry for JM, SM terminal box versions

Optional entries available : ½" NPT or M25 x 1.5 (only for SM) or ¾" NPT (only for SM)

M16 x 1.5 standard cable entry for PM terminal box version

Max. cable length to remote RHE transmitter 100 m/330 ft.

Sensor Enclosure Materials

Stainless steel 304 (standard), SS 316 (optional)

Coated aluminum terminal box, SS 316 terminal box (optional)

Enclosure Type

Protection class IP 66, NEMA 4 (standard), IP 66/67, NEMA 4X (optional)

Wetted Materials

Flow tubes SS 316 L, SuperDuplex, Sandvik HP160® or Alloy C22

Manifolds SS 316 L, seals FKM, FFKM, FVMQ, EPDM

Standard flanges SS 316 Ti, other connections SS 316 L

Additional/customer specific materials available upon request

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 (see datasheet)

North American Approvals Cl. I, Div. 1, 2, Gr. A, B, C, D, Zone 0, 1, 2 (see datasheet)

American Bureau of Shipping (ABS)

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.
Typical services offered are, but not limited to:

  • Certificates of origin and conformity, mill certificates
  • Data books including WPAR, WQS, NDT, test & quality plans, functional testing, calibration procedures, customized packing, factory acceptance etc. 
  • Painting to project specification 
  • Start up and commissioning services on/offshore


Customization services for machine integration. Consult factory


* At Qₙₒₘ pressure drop across a parallel tube sensor will be approximately 2 bar (29 psi) for H₂0. 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.