Bronkhorst

mini CORI-FLOW™ ML120V21

(Ultra) Low Flow Coriolis Mass Flow Controller

  • High accuracy
  • Fast response
  • Independent of fluid properties
  • Additional density and temperature output
  • Compact, space saving design
  • Very small internal volume
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mini CORI-FLOW™ML120V21

Low Flow Coriolis Mass Flow Controllers for Gases and Liquids

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 ML120V21 Mass Flow Controller (MFC) is suited for highly accurate measurement and control of gas or liquid flow ranges between 0,05…5 g/h and 2…200 g/h (which corresponds with 0,66 …66,6 mln/min up to 0,03…2,66 ln/min when used on nitrogen) at operating pressures up to 5 bar.

The mass flow controller offers “multi-range” functionality: factory calibrated ranges can be rescaled by the user, maintaining the original accuracy specs. The instrument contains a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for mass flow control by means of the integrated piezoelectric control valve.


Technical specifications

Measurement / control system
Flow range
(intermediate ranges available)
min. 0,05…5 g/h
max. 2…200 g/h
Mass flow accuracy Liquid: ±0,2% of rate;
Gas: ±0,5% of rate
Turndown ≥1:100
Repeatability ±0,05% of rate ± ½(ZS* x 100/flow)% based on digital output
Zero Stability (ZS)* < ±10 mg/h
Settling time, controller
(<2% of setpoint)
1 sec.
Operating temperature 0…70°C
Temperature effect** on zero: < 3 mg/h/°C;
on span: < 0,005% 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 10-8 mbar l/s He
Warm-up time > 30 min. for optimum accuracy
Mechanical parts
Material (wetted parts) stainless steel 316L or comparable
Sensor Single tube, DN 0.25; frequency 170 Hz ±20 Hz
Pressure rating 5 bar abs (higher on request)
Process connections (welded) compression type or face seal couplings
Seals Kalrez®
Valve piezoelectric + metal plunger
Weight 0,9 kg
Ingress protection (housing) IP40
Electrical properties
Power supply +15…24 Vdc +/- 10%
Max. ripple recommended: 50 mV tt
Max. power consumption max. 3 W
Analog output 0...5 (10) Vdc, min. load impedance > 2 kΩ;
0 (4)...20 mA (sourcing), max. load impedance < 375 Ω
Analogn setpoint 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™, PROFINET, EtherCAT®, Modbus RTU or ASCII, FLOW-BUS
Electrical connection
Analog/RS232 9-pin D-connector (male);
PROFIBUS DP bus: 9-pin D-connector (female);
power: 9-pin D-connector (male);
Devicenet™ 5-pin M12-connector (male);
EtherCAT®/ PROFINET 2 x RJ45 modular jack (in/out)
FLOW-BUS/Modbus-RTU/ASCII RJ45 modular jack

* 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.
***  To be rigidly bolted to a stiff and heavy mass or construction for guaranteed zero stability.
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
mini CORI-FLOW ML120 brochure

Manuals
MINI CORI-FLOW ML120 manual
MINI CORI-FLOW ML120 Quick Installation Guide

Hook-up diagrams
Analog I-O RS232
DeviceNet
EtherCAT
FLOW-BUS
Modbus
PROFIBUS DP
PROFINET
Optional Bus and IO Configurations

Dimensional drawing
Dimensional drawing ML120

Solids 3D
ML120Vxx 1-16 compr.type