Low Flow Coriolis Mass Flow Controllers for Gases and Liquids
The mini CORI-FLOW? Mass Flow Meters and Controllers are precise and compact instruments based on the Coriolis measuring principle, designed to address the needs of the low flow market. The Bronkhorst? model ML120V21 Mass Flow Controller (MFC) is suitable for highly accurate measurement and control of gas or liquid flow in the range of 0…200 g/h (which corresponds to 0…2.66 ln/min when used on nitrogen) at operating pressures up to 5 bar.
The mass flow controller offers “multi-range” functionality, allowing the user to rescale the factory-calibrated ranges while maintaining the original accuracy specifications. The instrument contains a microprocessor-based PC-board with signal and fieldbus conversion, as well as a PID controller for mass flow control via the integrated piezoelectric control valve.
Technical specifications
| Measurement / control system | |
|---|---|
| Flow rates | Liquid: 0…200 g/h (nominal flow rate: 100 g/h); Gas: 0…2.66 ln/min (N2); Full Scale (FS) value is user-configurable; advised minimum flow depends on fluid properties |
| Mass flow accuracy | Liquid: ±0,2% Rd; Gas: ±0,5% Rd |
| Repeatability | ±?0,05?%?of rate ± ?(ZS* x 100/actual flow)% |
| Turndown ratio | 1:100 |
| Zero stability (ZS) | < ±?10?mg/h (Guaranteed at constant temperature and for unchanging process and environment conditions.) |
| Settling time (in control, typical) | 1?sec. |
| Temperature effect | on zero: < 3 mg/h/°C; on span: < 0,005% Rd/°C; self heating (at zero flow): < 10°C (Depends on flow rate, heat capacity fluid, T amb., T fluid and cooling capacity.) |
| Operating temperature | 0?… 70?°C |
| Mounting | any position, attitude sensitivity negligible. Instrument to be rigidly bolted to a stiff and heavy mass or construction for guaranteed zero stability. External shocks or vibrations should be avoided. |
| Temperature accuracy | ±?0,5?°C |
| Density accuracy | < ±?5?kg/m??(at full scale flow) |
| Leak integrity, outboard | < 2 x 10-8?mbar l/s He |
| Warm-up time | >?30 min?for optimum accuracy |
| Mechanical parts | |
|---|---|
| Sensor | single tube, DN 0.25; frequency 170 Hz ± 20 Hz |
| Valve | piezoelectric valve (metal plunger) |
| Material (wetted parts) | stainless steel 316L or comparable |
| Pressure rating (PN) | 5?bar g?(higher on request); max. ΔP: 5 bar d |
| Process connections | compression type or face seal (VCR/VCO) couplings |
| Seals | Kalrez? |
| Weight | 0,9?kg |
| Ingress protection | 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 k?; 0 (4)…20 mA (sourcing), max. load impedance < 375 ? |
| Analog setpoint | 0…5 (10) Vdc, min. load impedance > 100 k?; 0 (4)…20 mA (sourcing), max. load impedance ~ 250 ? |
| Digital communication | standard: RS232 options: PROFIBUS DP, CANopen?, DeviceNet?, PROFINET, EtherCAT?, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, 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); |
| CANopen? / DeviceNet? | 5-pin M12-connector (male); |
| FLOW-BUS/Modbus-RTU/ASCII | RJ45 modular jack; |
| Modbus TCP / EtherNet/IP / POWERLINK | 2 x RJ45 modular jack (in/out); |
| EtherCAT?/ PROFINET | 2 x RJ45 modular jack (in/out); |
Technical specifications subject to change without notice.
Downloads
| Brochures | |
|---|---|
| mini CORI-FLOW ML120 brochure | |
| Manuals | |
|---|---|
| MINI CORI-FLOW ML120 manual | |
| MINI CORI-FLOW ML120 Quick Start Guide | |
| Hook-up diagrams | |
|---|---|
| Analog I-O RS232 | |
| DeviceNet | |
| EtherCAT | |
| FLOW-BUS | |
| Modbus RTU/ASCII | |
| PROFIBUS DP | |
| PROFINET | |
| CANopen | |
| EtherNet/IP | |
| Modbus-TCP | |
| Optional Bus and IO Configurations | |
| Dimensional drawing | |
|---|---|
| Dimensional drawing ML120 | |
| Solids 3D | |
|---|---|
| ML120Vxx 1-16 compr.type | |
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