Product Data Sheet
PS-00363, Rev O
Micro Motion® R-Series Coriolis Flow and
Density Meters
January 2019
Multi-variable flow and density measurement
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Basic liquid mass flow, volume flow, and density measurement performance in a compact design
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Rugged design minimizing process, mounting, and environmental effects
Best fit-for-application
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Cleanable, self-draining design for critical process control service
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Compact design enables installation flexibility
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Broad range of I/O offerings including HART, FOUNDATION™ fieldbus, 4-20mA, and wireless capabilities
Exceptional reliability and safety
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No moving parts to wear or replace minimizes maintenance for long-term reliability
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Robust sensor design
R-Series Flow Meters
January 2019
Micro Motion® R-Series flow meters
Micro Motion R-Series meters are designed for general utility use across a wide range of applications where basic flow and density
measurements are needed. Benefiting from the fundamental advantages of Coriolis technology, the Micro Motion R-series is an
ideal replacement for mechanical flow meters.
Tip
If you need help determining which Micro Motion products are right for your application, check out the Micro Motion® Technical
Overview and Specification Summary and other resources available at www.emerson.com/flowmeasurement.
Optimal flow measurement fit for general purpose applications
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Rugged measurement in a compact, drainable design that maximizes process up time
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Low frequency, high sensitivity fit-and-forget meter provides robust measurements even under demanding process conditions
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Multiple line sizes provide an ideal platform for batching, distribution, allocation and intra-plant measurement applications
Industry-leading capabilities that unleash your process potential
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Available with an extensive offering of transmitter and mounting options for maximum compatibility with your system
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State of the art, ISO-IEC 17025 compliant calibration stands achieving ±0.014% uncertainty drive best in class measurement
accuracy
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The most robust communication protocol offering in the industry including Smart Wireless
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True multi-variable technology measures necessary flow process variables simultaneously
Widest range of installation and process condition flexibility
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Featuring a low pressure drop, low weight design that reduces installation and commissioning costs
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Unmatched MVD transmitter technology with digital signal processing (DSP) delivers the fastest response rates enabling
accurate batch and process measurement
Measurement principles
As a practical application of the Coriolis effect, the Coriolis mass flow meter operating principle involves inducing a vibration of the
flow tube through which the fluid passes. The vibration, though it is not completely circular, provides the rotating reference frame
which gives rise to the Coriolis effect. While specific methods vary according to the design of the flow meter, sensors monitor and
analyze changes in frequency, phase shift, and amplitude of the vibrating flow tubes. The changes observed represent the mass
flow rate and density of the fluid.
Mass flow measurement
The measuring tubes are forced to oscillate producing a sine wave. At zero flow, the two tubes vibrate in phase with each other.
When flow is introduced, the Coriolis forces cause the tubes to twist resulting in a phase shift. The time difference between the
waves is measured and is directly proportional to the mass flow rate.
Watch this video to learn more about how a Coriolis flow meter measures mass flow and density (click the link and select View
Videos): https://www.emerson.com/en-us/automation/measurement-instrumentation/flow-measurement/coriolis-flow-meters.
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January 2019
A. Inlet pickoff displacement
B. No flow
C. Outlet pickoff displacement
D. Time
E. Inlet pickoff displacement
F. With flow
G. Outlet pickoff displacement
H. Time difference
I. Time
R-Series Flow Meters
Temperature measurement
Temperature is a measured variable that is available as an output. The temperature is also used internal to the sensor to
compensate for temperature influences on Young’s Modulus of Elasticity.
Meter characteristics
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Measurement accuracy is a function of fluid mass flow rate independent of operating temperature, pressure, or composition.
However, pressure drop through the sensor is dependent upon operating temperature, pressure, and fluid composition.
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Specifications and capabilities vary by model and certain models may have fewer available options. For detailed information
regarding performance and capabilities, contact customer service.
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The letter at the end of the base model code (for example R100S) represents wetted part material and/or application
designation: S = stainless steel and P = high pressure. Detailed information about the complete product model codes are
described later in this document.
Performance specifications
Reference operating conditions
For determining the performance capabilities of our meters, the following conditions were observed/utilized:
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Water at 68 °F (20.0 °C) to 77 °F (25.0 °C) and 14.5 psig (1.000 barg) to 29 psig (2.00 barg)
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Air and Natural Gas at 68 °F (20.0 °C) to 77 °F (25.0 °C) and 500 psig (34.47 barg) - 1,450 psig (99.97 barg)
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Accuracy based on industry leading accredited calibration stands according to ISO 17025/IEC 17025
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All models have a density range up to 5 g/cm3 (5000 kg/m3 )
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R-Series Flow Meters January 2019
Accuracy and repeatability
Accuracy and repeatability on liquids and slurries
Performance Specification Calibration code Y Calibration code A
Mass flow accuracy
Volume flow accuracy
Mass flow repeatability 0.25% of rate 0.2% of rate
Volume flow repeatability 0.25% of rate 0.2% of rate
Density accuracy ±0.01 g/cm³ (±10 kg/m³) ±0.003 g/cm³ (±3 kg/m³)
Density repeatability 0.005 g/cm³ (5 kg/m³) 0.0015 g/cm³ (1.5 kg/m³)
Temperature accuracy ±1 °C ±0.5% of reading
Temperature repeatability 32.36 °F (0.200 °C)
Stated flow accuracy includes the combined effects of repeatability, linearity, and hysteresis.
(1)
Valid at calibration conditions.
(2)
(1)
(1)
±0.5% of rate ±0.4% of rate
±0.5% of rate
(2)
±0.4% of rate
Accuracy and repeatability on gases
Performance specification
Mass flow accuracy
Mass flow repeatability
Temperature accuracy ±1 °C 0.5% of reading
Temperature repeatability 32.36 °F (0.200 °C)
Stated flow accuracy includes the combined effects of repeatability, linearity, and hysteresis.
(1)
(1)
(1)
All models
±0.75% of rate
0.5% of rate
Liquid flow rates
Nominal flow rate
Micro Motion has adopted the term nominal flow rate, which is the flow rate at which water at reference conditions causes
approximately 14.5 psig (1.000 barg) of pressure drop across the meter.
Mass flow rates for all models: 316L stainless steel (S) and high pressure (P)
Model
Nominal line size Nominal flow rate Maximum flow rate
inch mm lb/min kg/h lb/min kg/h
R025 0.25 DN6 50 1,366 100 2,720
R050 0.50 DN15 155 4,226 300 8,160
R100 1 DN25 717 19,514 1,200 32,650
R200 2 DN50 1,917 52,160 3,200 87,100
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January 2019
Model Nominal line size Nominal flow rate Maximum flow rate
inch mm lb/min kg/h lb/min kg/h
R300 3 DN80 4,900 133,356 8,744 238,499
R-Series Flow Meters
Volume flow rates for all models: 316L stainless steel (S) and high pressure (P)
Model Nominal flow rate Maximum flow rate
gal/min barrels/h l/h gal/min barrels/h l/h
R025 6 9 1,366 12 23 2,720
R050 19 27 4,226 36 69 8,160
R100 85 122 19,514 144 274 32,650
R200 230 328 52,160 384 731 87,100
R300 587 839 133,356 1,047 1,497 238,499
Gas flow rates
When selecting sensors for gas applications, pressure drop through the sensor is dependent upon operating temperature,
pressure, and fluid composition. Therefore, when selecting a sensor for any particular gas application, it is highly recommended
that you either refer to www.emerson.com/flowmeasurement or contact customer service for more information.
The below table indicates flow rates that produce approximately 25 psig (1.72 barg) pressure drop on natural gas.
Gas flow rates for all models: 316L stainless steel (S) and high pressure (P)
Model
R025 17 468 388 659
R050 52 1,429 1,183 2,010
R100 200 5,452 4,514 7,670
R200 666 18,137 15,018 25,515
R300 1,745 47,505 39,334 66,829
Note
Standard (SCFM) reference conditions are 14.7 psig (1.014 barg) and 60 °F (15.6 °C). Normal reference conditions are 14.69 psig
(1.013 barg) and 32.0 °F (0 °C)
Mass Volume
lb/min kg/h SCFM Nm3 /h
Zero stability
Zero stability is used when the flow rate approaches the low end of the flow range where the meter accuracy begins to deviate from
the stated accuracy rating, as depicted in the turndown section below. When operating at flow rates where meter accuracy begins
to deviate from the stated accuracy rating, accuracy is governed by the formula: accuracy = (zero stability/flow rate) x 100%.
Repeatability is similarly affected by low flow conditions.
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0
0.5
1.0
1.5
2.0
2.5
0 100908070605040302010
20:1
10:1
1:1
A
B
R-Series Flow Meters
January 2019
Turndown capabilities
The graph and table below represent an example of the measurement characteristics under various flow conditions. At flow rates
requiring large turndowns (greater than 20:1), the zero stability values may begin to govern capability dependent upon flow
conditions and meter in use.
A. Accuracy, %
B. Flow rate, % of nominal
Turndown from nominal
flow rate
Accuracy ±% 0.50 ±% 0.50 ±% 0.50
Pressure drop 0.1 psig (0.007 barg) 0.813 psig (0.05605 barg) 54.00 psig (3.7232 barg)
20:1 10:1 1:1
Zero stability for all models: 316L stainless steel (S) and high pressure (P)
Model
R025 0.0061 0.165
R050 0.0180 0.492
R100 0.0750 2.046
R200 0.2398 6.540
R300 0.4950 13.472
Zero stability
lb/min kg/h
Process pressure ratings
Sensor maximum working pressure reflects the highest possible pressure rating for a given sensor. Process connection type and
environmental and process fluid temperatures may reduce the maximum rating. Refer to the Technical Data Sheet for common
sensor and fitting combinations.
All sensors comply with Council Directive 2014/68/EU on pressure equipment.
Note
R-Series sensors with JIS process connections do not comply with ASME B31.1 power piping code.
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January 2019
R-Series Flow Meters
Sensor maximum working pressure for all models: 316L stainless steel (S) and high pressure (P)
Model Pressure
All stainless steel models (R025S–R300S) 1,450 psig (100 barg)
R025P 2,300 psig (159 barg)
Case pressure
Case pressure for all models: 316L stainless steel (S) and high pressure (P)
Model Case maximum pressure
R025 471 psig (32 barg) 1,884 psig (130 barg)
R050 383 psig (26 barg) 1,530 psig (105 barg)
R100 320 psig (22 barg) 1,281 psig (88 barg)
R200 190 psig (13 barg) 760 psig (52 barg)
R300 417 psig (29 barg) 1,668 psig (115 barg)
(1)
Typical burst pressure
Case maximum pressure is determined by applying a safety factor of 4 to typical burst pressure.
(1)
Operating conditions: Environmental
Vibration limits
Meets IEC 60068-2-6, endurance sweep, 5 to 2000 Hz, 50 sweep cycles at 1.0 g.
Temperature limits
Sensors can be used in the process and ambient temperature ranges shown in the temperature limit graphs. For the purposes of
selecting electronics options, temperature limit graphs should be used only as a general guide. If your process conditions are close
to the gray area, consult with your Micro Motion representative.
Note
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In all cases, the electronics cannot be operated where the ambient temperature is below -40 °F (-40.0 °C) or above 140 °F
(60.0 °C). If a sensor is to be used where the ambient temperature is outside of the range permissible for the electronics, the
electronics must be remotely located where the ambient temperature is within the permissible range, as indicated by the
shaded areas of the temperature limit graphs.
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Temperature limits may be further restricted by hazardous area approvals. Refer to the hazardous area approvals
documentation shipped with the sensor or available at www.emerson.com/flowmeasurement.
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The extended-mount electronics option allows the sensor case to be insulated without covering the transmitter, core
processor, or junction box, but does not affect temperature ratings. When insulating the sensor case at elevated process
temperatures (above 140 °F (60.0 °C)), please ensure electronics are not enclosed in insulation as this may lead to electronics
failure.
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R-Series Flow Meters January 2019
Ambient and process temperature limits for all models: 316L stainless steel (S) and high pressure (P)
140 (60)
T
amb
–40 (–40)
158 (70)
104 (40)
A
B
–148 (–100)
T
= Ambient temperature °F (°C)
amb
T
= Process temperature °F (°C)
proc
A = All available electronic options
B= Remote mount electronics only
–148
(–100)
T
proc
302
(150)
Operating conditions: Process
Process temperature effect
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For mass flow measurement, process temperature effect is defined as the change in sensor flow accuracy due to process
temperature change away from the calibration temperature. Temperature effect can be corrected by zeroing at the process
conditions.
Process temperature effect for all models: 316L stainless steel (S) and high pressure (P)
Model code
R025, R050, R100, R200, R300 ±0.00175 ±0.0001 ±0.1
Mass flow rate (% of
maximum rate) per °C
Density
g/cm3 per °C kg/m3 per °C
Process pressure effect
Process pressure effect is defined as the change in sensor flow accuracy due to process pressure change away from the calibration
pressure. This effect can be corrected by dynamic pressure input or a fixed meter factor. See installation manual for proper setup
and configuration.
Process pressure effect for all models: 316L stainless steel (S) and high pressure (P)
Model code
R025, R050, R100 none none
R200 -0.001 per psig
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Liquid or gas flow (% of rate) Density
–0.00003 g/cm3 per psig
(-0.015 per barg)
(-0.43 kg/m3 per barg)
January 2019
Model code Liquid or gas flow (% of rate) Density
R-Series Flow Meters
R300 -0.001 per psig
(-0.015 per barg)
–0.00001 g/cm3 per psig
(-0.145 kg/m3 per barg)
Pressure relief
R-Series sensors are available with a rupture disk installed on the case. Rupture disks are meant to vent process fluid from the
sensor case in the unlikely event of a flow tube breach. Some users connect a pipeline to the rupture disk to help contain escaping
process fluid. For more information about rupture disks, contact Micro Motion Customer Service.
If the sensor has a rupture disk, it should remain installed at all times as it would otherwise be necessary to re-purge the case. If the
rupture disk is activated by a tube breach, the seal in the rupture disk will be broken, and the Coriolis meter should be removed
from service.
The rupture disk is located as follows on the meter, and the warning sticker shown is placed next to it.
DANGER
Stay clear of the rupture disk pressure relief area. High-pressure fluid escaping from the sensor can cause severe injury or
death.
The sensor must be oriented so that personnel and equipment will not be exposed to any discharge along the pressure relief path.
Important
If a rupture disk is used, the housing can no longer assume a secondary containment function.
WARNING
Removing the Purge Fitting, Blind Plug, or Rupture Disks compromises the Ex-i Safety Certification, the Ex-tc Safety
Certification, and the IP-rating of the Coriolis meter. Any modification to the Purge Fitting, Blind Plug, or Rupture Disks
must maintain a minimum of IP66/IP67 Ratings.
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R-Series Flow Meters January 2019
Hazardous area classifications
Approvals and certifications
Type Approval or certification (typical)
CSA and CSA C-US Ambient temperature: -40 °F (-40.0 °C) to 140 °F (60.0 °C)) Class I, Div. 1, Groups C
and D
Class I, Div. 2, Groups A, B, C, and D Class II, Div.1, Groups E, F, and G
ATEX II 1(2) G Ex ib IIB/IIC T6.T1 Ga/Gb
II 2 D Ex ib IIIC T* °C Db IP66/IP67
II 3G Ex nA IIC T1–T4/T5 Gc
II 3D Ex tc IIIC T*°C Dc IP66
IECEx Ex ib IIB/IIC T1–T4/T5/T6 Ga/Gb
Ex ib IIIC T* °C Db
Ex nA IIC T1-T4/T5 Gc
Ex tc IIIC T* °C Dc
NEPSI Ex ib IIB/IIC T1–T6 Gb
Ex ibD 21 T450°C-T85°C Ex nA IIC T1–T6 Gc
DIP A22 T(1) T1-T6
Ingress Protection Rating IP 66/67 for sensors and transmitters
EMC effects Complies with EMC directive 2004/108/EC per EN 61326 Industrial
Complies with NAMUR NE-21 (22.08.2007)
Note
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Approvals shown are for R-Series meters configured with a model 1700 transmitter. Meters with integral electronics may have
more restrictive approvals. Refer to the Product Data Sheet for each transmitter for details.
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When a meter is ordered with hazardous area approvals, detailed information is shipped along with the product.
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More information about hazardous approvals, including detailed specifications and temperature graphs for all meter
configurations is available on the R-Series product page from the Emerson web site (www.emerson.com/flowmeasurement).
Industry standards
Type
Industry standards and
commercial approvals
Standard
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NAMUR: NE132 (burst pressure, sensor flange to flange length), NE131
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Pressure Equipment Directive (PED)
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Canadian Registration Number (CRN)
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Dual Seal
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ASME B31.3 Piping Code
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SIL2 and SIL3 safety certifications
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