Bronkhorst

CORI-FLOW™ M55

Low Flow Coriolis Mass Flow Meter / Controller

  • High accuracy, excellent repeatability
  • Fast response
  • Independent of fluid properties
  • Compact, rugged (IP65) design
  • Optional ATEX approval Cat.3, Zone 2
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CORI-FLOW™M55

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

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 M55 Mass Flow Meter (MFM) is suited for highly accurate measurement of gas or liquid flow ranges between 0,5…50 kg/h and 6…600 kg/h (which corresponds with 6,66…666,6 ln/min up to 80…8000 ln/min when used on nitrogen) at operating pressures up to 100 bar. 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. 0,5…50 kg/h
max. 6…600 kg/h
Mass flow accuracy Liquid: ±0,2% of rate;
Gas: ±0,5% of rate
Turndown up to 1:100
Repeatability ±0,1% of rate (based on digital output)
Zero Stability (ZS)* < ±0,1 kg/h
Operating temperature standard: 0…70°C;
max. 50°C for ATEX Cat.3, Zone 2;
max. 120°C (ambient+fluid) for special version with remote electronics (130°C ≤ 1 hour allowed for CIP)
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 or comparable;
optional: Hastelloy-C22
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
Power consumption Meter: approx. 80 mA at 15 Vdc
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 > 424 kΩ;
0 (4)...20 mA (sourcing), max. load impedance ~ 250 Ω
Digital communication standard: RS232;
options: PROFIBUS DP, DeviceNet™, Modbus RTU or ASCII, 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
M55+C0I: Gas flow control valve Kv-max= 6,6 x 10-2
M55+C2I: Liquid flow control valve Kv-max= 2,3 x 10-3
M55+C5I: Gas/Liquid flow control valve Kv-max= 6,6 x 10-2
M55+F-004AI: Gas/Liquid flow control Kv-max= 3,0 x 10-1
M55+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 productpage on our website

Downloads

Brochures
CORI-FLOW M54-M55 brochure
CORI-FILL brochure

Manuals
Manual CORI-FLOW
Manual CORI-FILL

Hook-up diagrams
Analog I-O RS232
DeviceNet
FLOW-BUS
Modbus
PROFIBUS DP

Dimensional drawing
M52 - M53 - M54 - M55 Mass Flow Meters
M5x MFM with C0I - C2I control valve
M5x MFM with C5I control valve
M5x MFM with F-004AI control valve