mini CORI-FLOW™ M15

Low Flow Coriolis Mass Flow Meter / Controller

  • High accuracy, excellent repeatability
  • Fast response
  • Independent of fluid properties
  • Additional density and temperature output
  • Compact, rugged (IP65) design
  • Optional ATEX approval Cat.3, Zone 2
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mini CORI-FLOW™M15

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 M15 Mass Flow Meter (MFM) is suited for highly accurate measurement of gas or liquid flow in the range of 0…300 kg/h (which corresponds with 0…4000 ln/min when used on nitrogen) at operating pressures up to 100 bar (higher on request). The instruments are equipped with a robust IP65 weatherproof housing and are optionally available with ATEX approval for use in Zone 2 hazardous areas.

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…300 kg/h (nominal flow rate: 100 kg/h);
Gas: 0…4000 ln/min (N2);
Full Scale (FS) value is user-configurable
Mass flow accuracyLiquid: ±0,2% Rd;
Gas: ±0,5% Rd
Repeatability± 0,05 % of rate ± ½(ZS* x 100/actual flow)%
Turndown ratioup to 1:100
Zero stability (ZS)< ± 50 g/h
(Guaranteed at constant temperature and for unchanging process and environment conditions.)
Response time (sensor)200 msec
Temperature effecton zero: < 5 g/h/°C;
on span: < 0,001% Rd/°C;
self heating (at zero flow): < 10°C
(Depends on flow rate, heat capacity fluid, T amb., T fluid and cooling capacity.)
Operating temperature0 … 70 °C ;
for ATEX Cat.3, Zone 2 max. 50°C
Mountingany position, attitude sensitivity negligible.
External shocks or vibrations should be avoided.
Temperature accuracy± 0,5 °C
Density accuracy< ± 5 kg/m³ (at full scale flow)
Leak integrity, outboardtested < 2 x 10-9 mbar l/s He
Warm-up time> 30 min for optimum accuracy
Mechanical parts
Sensorsingle tube, DN 3.1
Material (wetted parts)stainless steel 316L / 1.4404;
Housingstainless steel 430F
Pressure rating (PN)100 bar abs , higher on request
Process connectionscompression type or face seal (VCR/VCO) couplings, or Tri-Clamp flanges (welded)
Weight4,7 kg
Ingress protectionIP65 (weatherproof)
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), max. load impedance < 375 Ω
Analog setpoint0…5 (10) Vdc, min. load impedance > 100 kΩ
0 (4)…20 mA (sourcing), max. load impedance ~ 250 Ω
Digital communicationstandard: RS232;
options: PROFIBUS DP, DeviceNet™, Modbus RTU or FLOW-BUS
Electrical connection
Analog/RS2328-pin DIN (male);
PROFIBUS DPbus: 5-pin M12 (female);
power: 8-pin DIN (male);
CANopen® / DeviceNet™5-pin M12 (male);
FLOW-BUS/Modbus-RTU/ASCII5-pin M12 (male);
Control valve options
M15+C0I: Gas flow control valveKv-max= 6,6 x 10-2
M15+C2I: Liquid flow control valveKv-max= 2,3 x 10-3
M15+C5I: Gas/Liquid flow control valveKv-max= 6,6 x 10-2
M15+F-004AI: Gas/Liquid flow controlKv-max= 3,0 x 10-1
M15+F-004BI: Gas/Liquid flow controlKv-max= 1,0
External actuator options to be connected to the controller
Certification for hazardous areas
Approvals / certificates

Technical specifications subject to change without notice.

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


mini CORI-FLOW M15 brochure
CORI-FILL brochure
MINI CORI-FLOW M1x Quick Installation Guide
Instruction removing/re-installing transportation bolts M15
KCs certificate
Hook-up diagrams
Analog I-O RS232
Dimensional drawings
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Dimensions Weld Adapters
Solids 3D
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