mini CORI-FLOW Coriolis Flow Meter & Controller

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 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 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 rates	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: ≤±0,1% Rd (of Reading), at calibration conditions at FS value; 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 max	-20 … +70 °C
Ambient temperature max	-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; silicon seal (bottom), NBR seal (cover)
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	6 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

Electrical connection
Analog/RS232	M20 gland



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

Ex-proof specifications

Approvals / certificates

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.

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