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
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.


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


Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
info@bronkhorst.com

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