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Datasheet MI140

mini CORI-FLOW™ MI140

Low Flow Coriolis Mass Flow Meter / Controller

  • World's most compact, rugged (IP66/IP67) design
  • Particularly suitable for pilot or mini plants (Ex zone 2)
  • High accuracy, excellent repeatability and fast response
  • Independent of physical properties
  • Mass flow, density, volume flow, temperature and PID controller outputs
  • Very versatile, suitable for dosing, using any control valve or pump
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mini CORI-FLOW™MI140

Low Flow Coriolis Mass Flow Meters / Controllers for Liquid and Gases

mini CORI-FLOW™ MI-series Mass Flow Meters and Controllers are precise and compact instruments, based on the Coriolis measuring principle, designed to cover the needs of the low flow market. Bronkhorst® model MI140 Mass Flow Meter (MFM) is suited for highly accurate measurement of gas or liquid flow in the range 0…30 kg/h (which corresponds with 0…400 ln/min when used on nitrogen) at operating pressures up to 200 bar. The instruments are equipped with a robust IP66/IP67 weatherproof housing with screw terminal connections. The MI-series MkII are suitable for an industrial area up to pollution degree 3 with additional gas or dust (Ex) atmosphere (zone 2/22 or EPL Gc/Dc).

The instrument contains smart electronics, featuring alarm and counter functions, and a PID controller for optional mass flow control by means of a separately mounted control valve or pump. With regard to connectivity, the instruments can be equipped with a wide range of fieldbus options, beside their standard analog and RS232 I/O communication.

Technical specifications

Measurement / control system
Flow ratesLiquid: 0…30 kg/h (nominal flow rate: 10 kg/h);
Gas: 0…400 ln/min (N2);
Full Scale (FS) value user-configurable
Mass flow accuracyLiquid: ≤±0,2% Rd (of Reading);
Gas: ≤±0,5% Rd
Volume flow accuracyLiquid: ≤ ±0,2% Rd, at fixed density value;
Gas: ≤ ±0,5% Rd
RepeatabilityLiquid mass flow: ≤ ±0,05% Rd ± ½ZS (Zero Stability);
Gas mass flow: ≤ ±0,25% Rd ± ½ZS;
Density: ≤ ±1 kg/m3 (at calibration conditions at stable flow)
Turndown ratioup to 1:1000 (in digital mode)
Zero stability (ZS)< ± 6 g/h
(Guaranteed at constant temperature and for unchanging process and environment conditions.)
Response time (sensor)≤ 200 msec
Fluid temperature-20 … +70 °C
Ambient temperature-20 … +70 °C
Mountingany position, attitude sensitivity negligible.
External shocks or vibrations should be avoided.
Temperature sensitivity≤ 0,5 g/h/°C
Temperature accuracy± 0,5 °C
Density accuracy< ± 1 kg/m³ (at calibration conditions at stable flow), up to 2500 kg/m3
Max. fluid viscosity5000 cP
Leak integrity, outboardtested < 2 x 10-9 mbar l/s He
Warm-up time> 30 min for optimum accuracy
Mechanical parts
Sensorsingle tube, DN 1.14, Ra ≤0,8 µm
Material (wetted parts)stainless steel 316L / 1.4404
Housingstainless steel 316L / 1.4404 (body);
high-grade anodised aluminium alloy (EN AW-6082-T6, AlSi1MgMn, housing and lid); FKM (sealings)
Pressure rating (PN)200 bar abs
Process connectionscompression type or face seal (VCR/VCO) couplings, or Tri-Clamp flanges (welded)
Sealsnone (in fluid path)
Weight5 kg
Ingress protectionIP66/IP67
Electrical properties
Power supply+15…24 Vdc +/- 10%
Max. ripple recommended: 50 mV tt
Max. power consumptionmeter: max. 3 W;
controller: max 7 W
Analog output0…5 (10) Vdc, min. load impedance > 2 kΩ;
0 (4)…20 mA (sourcing),
  regular, max. load impedance < 375 Ω;
  with HART, load impedance 250...600 Ω
Analog setpoint(for MFM + pump or control valve)
0…5 (10) Vdc, min. load impedance > 100 kΩ
0 (4)…20 mA (sourcing), max. load impedance ~ 250 Ω
Digital communicationstandard: RS232;
options: CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, FLOW-BUS or HART
Valve control signalM12 cable gland, screw terminals <2,5 mm2
Bus terminationdipswitch integrated on pc-board
Support interfacemicro USB on pc-board
Electrical connection
Analog/RS232M20 gland : I/O signals and Power
M12 gland : Actuator output
M12 gland : Bronkhorst valve out
PROFIBUS DPM20 gland
CANopen® / DeviceNet™M20 gland
FLOW-BUS/Modbus-RTU/ASCIIM20 gland
Modbus TCP / EtherNet/IP / POWERLINKM20 gland
EtherCAT®/ PROFINETM20 gland
Control valve options
External actuator options to be connected to the controller
Certification for hazardous areas
Approvals / certificates
Hazardous areasATEX / IECEx / UKEx category 3, zone 2/22 hazardous areas (only for MkII)
Ex II 3G Ex ec IIC T4 Gc (gas)
Ex II 3D Ex tc IIIC T100 °C Dc (dust)

Technical specifications subject to change without notice.

Control valve options
MI140+C0I: Gas flow control valve Kv-max= 6,6 x 10-2
MI140+C2I: Liquid flow control valve Kv-max= 2,3 x 10-3
MI140+C5I: Gas/Liquid flow control valve Kv-max= 6,6 x 10-2
MI140+F-004AI: Gas/Liquid flow control Kv-max= 3,0 x 10-1


Technical specifications and dimensions subject to change without notice.
Actual form, fit, function is subject to change in next release. 

For dimensional drawings and hook-up diagrams please visit the product page on our website

Downloads

Brochures
Datasheet Industrial mini CORI-FLOW Series MI1N0
mini CORI-FLOW overview brochure
CORI-FILL brochure
Manuals
Industrial mini CORI-FLOW manual
Hook-up diagrams
Analog I/O, RS232 and HART
PROFIBUS DP
DeviceNet / CANopen
FLOW-BUS
Ethernet interfaces (EtherCAT, EtherNet/IP, Modbus-TCP, POWERLINK, PROFINET)
Modbus RTU/ASCII
Optional Bus and IO Configurations
Dimensional drawings
Dimensional drawing MI1x0
Dimensions Weld Adapters
Solids 3D
MI140-qtr-inch-OD
Certificates
ATEX CAT 3 Certificate mini CORI-FLOW MI-Series : DEKRA 21ATEX0002X
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Bronkhorst High-Tech designs and manufactures innovative instruments and subsystems for low-flow measurement and control for use in laboratories, machinery and industry. Driven by a strong sense of sustainability and with many years of experience, we offer an extensive range of (mass) flow meters and controllers for gases and liquids, based on thermal, Coriolis and ultrasonic measuring principles. Our global sales and service network provides local support in more than 40 countries. Discover Bronkhorst®!