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

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

mini CORI-FLOW™ Mass Flow Meters and Controllers are precise, versatile and compact instruments, based on the Coriolis measuring principle, featuring fast response and 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 ranges up to 30 kg/h (which corresponds 400 l_n/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 a microprocessor, 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

流量レンジ	Liquid: 0…30 kg/h (nominal flow rate: 10 kg/h); Gas: 0…400 l_n/min (N₂); Full Scale (FS) value user-configurable










Mass flow accuracy	Liquid: ≤±0,2% Rd (of Reading); Gas: ≤±0,5% Rd
Volume flow accuracy	Liquid: ≤ ±0,2% Rd, at fixed density value; Gas: ≤ ±0,5% Rd

Repeatability	Liquid 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 ratio	up 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



Mounting	any 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 viscosity	5000 cP

Leak integrity, outboard	tested < 2 x 10^-9 mbar l/s He




Warm-up time	> 30 min for optimum accuracy

Mechanical parts
Sensor	single tube, DN 1.14, Ra ≤0,8 µm






Material (wetted parts)	stainless steel 316L / 1.4404

Housing	stainless 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 connections	compression type or face seal (VCR/VCO) couplings, or Tri-Clamp flanges (welded)

Seals	none (in fluid path)
Weight	5 kg
Ingress protection	IP66/IP67

Electrical properties

Power supply	+15…24 Vdc +/- 10% Max. ripple recommended: 50 mV tt


Max. power consumption	meter: max. 3 W; controller: max 7 W







Analog output	0…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 communication	standard: RS232; options: CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, FLOW-BUS or HART





Valve control signal	M12 cable gland, screw terminals <2,5 mm2
Bus termination	dipswitch integrated on pc-board
Support interface	micro USB on pc-board

Electrical connection
Analog/RS232	M20 gland : I/O signals and Power M12 gland : Actuator output M12 gland : Bronkhorst valve out



PROFIBUS DP	M20 gland
CANopen® / DeviceNet™	M20 gland

FLOW-BUS/Modbus-RTU/ASCII	M20 gland

Modbus TCP / EtherNet/IP / POWERLINK	M20 gland



EtherCAT®/ PROFINET	M20 gland

Control valve options

External actuator options to be connected to the controller

Certification for hazardous areas

Approvals / certificates
Hazardous areas	ATEX / 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)

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

mini CORI-FLOW™ MI140

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

Technical specifications

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