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 ranges between 0,2…5 kg/h and 3…300 kg/h (which corresponds with 2,67…66,6 ln/min up to 40…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 range
(intermediate ranges available)
min. 0,2…5 kg/h
max. 3…300 kg/h
Mass flow accuracy Liquid: ±0,2% of rate;
Gas: ±0,5% of rate
Turndown up to 1:100
Repeatability ±0,05% of rate ± ½(ZS* x 100/actual flow)%
Zero Stability (ZS)* < ±50 g/h
Response time, meter (t98%) ≤ 200 msec
Operating temperature 0…70°C;
for ATEX Cat.3, Zone 2 max. 50°C
Temperature effect** on zero: < 0,5 g/h/°C;
on span: < 0,001% Rd/°C;
self heating (at zero flow): ≤ 10°C
Temperature accuracy ±0,5°C
Density accuracy < ±5 kg/m3
Mounting*** Any position, attitude sensitivity negligible
Leak integrity Outboard < 2 x 10-9 mbar l/s He
Warm-up time > 30 min. for optimum accuracy
Mechanical parts
Material (wetted parts) stainless steel 316L / 1.4404
Housing stainless steel 430F
Sensor single tube, DN 3.1
Pressure rating 100 bar abs
Process connections (welded) compression type or face seal couplings
Seals metal
Ingress protection (housing) IP65 (weatherproof)
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), max. load impedance < 375 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: PROFIBUS DP, DeviceNet™, Modbus RTU, FLOW-BUS
Electrical connection
Analog/RS232 8-pin DIN (male);
PROFIBUS DP bus: 5-pin M12 (female);
power: 8-pin DIN (male);
Devicenet™/FLOW-BUS/Modbus 5-pin M12 (male);
Control valve options
M15+C0I: Gas flow control valve Kv-max= 6,6 x 10-2
M15+C2I: Liquid flow control valve Kv-max= 2,3 x 10-3
M15+C5I: Gas/Liquid flow control valve Kv-max= 6,6 x 10-2
M15+F-004AI: Gas/Liquid flow control Kv-max= 3,0 x 10-1
M15+F-004BI: Gas/Liquid flow control Kv-max= 1,0

* Guaranteed at constant temperature and for unchanging process and environment conditions.
**   Depends on flow rate, heat capacity fluid, T amb., T fluid and cooling capacity.
***  External shocks or vibrations should be avoided.
Technical specifications and dimensions 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 Quick Installation Guide


Hook-up diagrams
Analog I-O RS232

Dimensional drawing
M15 Mass Flow Meters
M15 Mass Flow Meter with C2I control valve
M15 Mass Flow Meter with C5I control valve
M15 Mass Flow Meter with F-002AI control valve
M15 Mass Flow Meter with F-003AI control valve
M15 Mass Flow Meter with F-003BI control valve
M15 Mass Flow Meter with F-004AI control valve
M15 Mass Flow Meter with F-004BI control valve
M15 Mass Flow Meter with F-033CI control valve

Solids 3D
Mass block mini Cori-Flow Mxx 2kg
Mass block mini Cori-Flow Mxx 4kg

Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
[email protected]

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