What are you looking for?
Bronkhorst
Datasheet MI140

mini CORI-FLOW™ MI140

Low Flow Coriolis Mass Flow Meter / Controller

  • High accuracy, excellent repeatability
  • Fast response
  • Independent of fluid properties
  • Additional density and temperature output
  • Compact, rugged (IP66/IP67) design, screw terminal connection
Get a quote Downloads Datasheet
mini CORI-FLOW™MI140

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

mini CORI-FLOW™ 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 control of liquid flow in the range of 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 instrument contains a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for optional mass flow control by means of a separately mounted control valve or pump.

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: ≤±0,1% Rd (of Reading), at calibration conditions at FS value;
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;
silicon seal (bottom), NBR seal (cover)
Pressure rating (PN)200 bar abs
Process connectionscompression type or face seal (VCR/VCO) couplings, or Tri-Clamp flanges (welded)
Sealsnone (in fluid path)
Weight6 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
Electrical connection
Analog/RS232M20 gland
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
Ex-proof specifications
Approvals / certificates

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
FLOW-BUS
Modbus RTU/ASCII
PROFIBUS DP
Ethernet interfaces (EtherCAT, EtherNet/IP, Modbus-TCP, POWERLINK, PROFINET)
Optional Bus and IO Configurations
Dimensional drawing
Dimensional drawing MI1x0
Dimensions Weld Adapters
Solids 3D
MI140-qtr-inch-OD
Download as PDF
BRONKHORST (UK) Ltd

1 Kings Court
Willie Snaith Road
Newmarket Suffolk CB8 7TG
Tel. +44 1223 833222
[email protected]

         Social Responsibility
Copyright © 2023 Bronkhorst. All rights reserved.     Sitemap     Disclaimer     Privacy note

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®!