The document discusses RBCM Coriolis mass flow meters. It summarizes that the meters use the Coriolis effect to directly measure mass flow, volume flow, density, and temperature of liquids and slurries without additional equipment. The meters detect the Coriolis force caused by the mass flow through a pair of curved tubes. Specifications, model selection information, ordering notes, and applications are provided.

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RBCM Coriolis Mass Flow Meter Catalog
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RBCM Coriolis Mass Flow Meter
1. Summary
The structure of RBCM Coriolis Mass Flow Meters（DN1 to 150mm） was
consisted of a pair of bended tubes. The principle is to detect Coriolis force
forced a pair of tubes from inner mass flow by fluid. The RBCM Coriolis
Mass Flow Meters offer direct mass flow, volume flow, density, and
temperature measurement of liquids and slurries — without the need for
additional equipment, manual calculations, or estimations.
2. Coriolis Measuring Principle
RBCM Coriolis flow meters are instruments that, using the Coriolis principle, measure directly the mass
flow rate of a process. The Coriolis force is the phenomenon that causes objects to appear to curve as they
move across the surface of the earth.
A Coriolis meter artificially introduces a positive and negative Coriolis acceleration to the process. As
illustrated in the diagram below, the entire process is split and re-directed through two curved tubes. The
tubes are vibrated at a multiple of their natural resonant frequency. Miniature velocity transducers
comprising of a coil & a magnet are each mounted on one of the tubes as shown. When no flow is present
the tubes vibrate, and the sine wave output of each velocity transducer is in phase. When flow is initiated
the tubes will begin to twist due to the Coriolis acceleration induced by the moving mass. This causes the
sine waves to shift in relation to one another (either lead or lag depending on the flows' direction) and a
measurement is made. An added benefit of Coriolis meters is their ability to perform multiple
measurements. In addition to measuring mass flow directly, Coriolis mass flow meters also measure the
density of the process by monitoring the period of the tube vibration and characterizing that as a density.
Advanced digital signal processing enables Coriolis meter transmitters to calculate the concentrations of
two component mixture and net volumes, etc. Variations on the split-tube design now include
straight-through tubes and double- looped single tubes.

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3. Specifications
3.1 Technical Specifications
Table of Technical Specifications (Table 6)
Titles Technical Specifications
Mass flow accuracy ±[0.2% +（zero stability /flow rate×100%）], 0.15% for optional
Mass flow repeatability ±(1/2) ×[0.2% +（zero stability /flow rate×100%）]
Density range 0.2 g/cm3～3.5g/cm3
Density accuracy ±0.002g/cm3
Temperature range -60℃～+200℃ (-60℃～+300℃,-200℃～+100℃ for optional)
Temperature accuracy ±1℃
Output of current loop 4mA～20mA
Output of frequency/pulse 0Hz～10kHz
Communication RS485/MODBUS or HART
Contactor capacity and form of
the relay
24V/0.1A, normal open
3.2 Other Specifications
Environmental Specifications (Table 7)
Titles Specifications
Temperature range of fluid -40℃～+200℃ (-40℃～+300℃,-200℃～+100℃ for optional)
Environmental temperature
range
0℃～+60℃(-40℃～+60℃)
Environmental humidity ≤90% RH, non- condensation
Atmospheric pressure range 86kPa～106kPa
Power supply of transmitters DC (24±10%) V
Power consumed ＜15W
Essential safety Ex code ExibIIBT4Gb
Composite Ex code ExdibIICT6Gb
Specifications (Table 8)
Specs
Line Sizes
(mm)
Flow Range
(t/h)
Calibration
Range (t/h)
Max. Tube
Pressure
(MPa)
Zero
Stability
(t/h)
Velocity
Parameter
(h m/t s)
DN1 1 0～0.02
0.002～
0.02
4.0 0.000005 353.7
DN2 2 0～0.06
0.006～
0.06
4.0 0.00002 88.4
DN3 3 0～0.35
0.035～
0.35
4.0 0.00008 39.3
DN6 6 0～0.7 0.07～0.7 4.0 0.00016 19.65

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RBCM Coriolis Mass Flow Meter Catalog
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DN10 10 0～1.2 0.12～1.2 4.0 0.0002 4.912
DN15 15 0～6.4 0.64～6.4 4.0 0.0011 2.183
DN25 25 0～16 1.6～16 4.0 0.002 0.902
DN40 40 0～40 4～40 4.0 0.003 0.334
DN50 50 0～65 6.5～65 4.0 0.006 0.197
DN80 80 0～160 16～160 2.5 0.01 0.0873
DN100 100 0～250 25～250 2.5 0.015 0.0544
DN150 150 0～550 55～550 2.5 0.03 0.0239
4. Model Selection
Model Diameter
Flow Range
（t/h）
Model Diameter
Flow Range
（t/h）
RBCM-DN1 DN1 0～0.04 RBCM-DN 40 DN40 0～40
RBCM-DN DN3 0～0.35 RBCM-DN50 DN50 0～65
RBCM-DN DN6 0～0.7 RBCM-DN65 DN65 0～80
RBCM-DN1 DN10 0～1.2 RBCM-DN80 DN80 0～160
RBCM-DN1 DN15 0～6.4 RBCM-DN100 DN100 0～280
RBCM-DN DN25 0～16 RBCM-DN150，200 DN150， 200 0～550
T Construction Type
C Compact
R Remote
Pressure Range
25 2.5MPa (DN80~DN150)
40 4.0MPa (DN15~DN65)
30 4.0MPa or 30MPa（DN1~DN10）
S Special
Temperature
T1 (-60~200℃)
T2 (-60~300℃) high temperature type
T3 (-200~100℃）low temperature
Output
A 4-20mA、0-10KHzRS485+MODBUS
H Hart
Ex-proof
No None
BT4 ExibIIBT4 Gb
CT6 ExdibIICT6 Gb
Accuracy
A2 0.2%

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Order Notice:
1. Standard measuring tube: SS316L, other wetted parts: SS304, if you need special demand, pls inquire.
2. If you need the pipe size is more than DN150, pls inquire.
5. Application
Measurement of mass flow rate, mass total, volume flow rate and volume total, density and temperature of
liquids, slurry and multiphase liquids are measured.;
 Mass flow and water content in oil fields and petrochemical plants
 Automatic loading control
 Desulphurization industry
 Chemical process
 The reactor feed quantitative
 Food and beverage industries
 Pharmaceutical industry
 Paper mills (pulp)
 Measurement of fuels such as LPG, LNG, etc.
A1 0.1~0.15%
Batch Control
N No
W with
Power
D 24VDC
A 220VAC
Flange Type
D DIN
A ANSI
S Special
Measuring tube material
A
Measuring tube:316L; other wetted parts:
SS304
B
Measuring tube:316L; other wetted parts:
SS316L
C
Measuring tube: HC-276; other wetted parts:
SS304
D
Measuring tube: HC-276; other wetted parts:
SS316L
E
Measuring tube: HC-276; other wetted parts:
HC-276

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 Micro filling Machine
 Intelligent Density Meter
 Building materials industry