Bronkhorst mini CORI-FLOW™ ML120V21 (Ultra) Low Flow Coriolis Mass Flow Controller
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.
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 ± ½(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.) |
| Response time (sensor) | 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/m³ (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 |
| Housing | stainless steel 430F |
| 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 kΩ; 0 (4)…20 mA (sourcing), max. load impedance < 375 Ω |
| Analog 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, 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); |
| 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 |
Technical specifications subject to change without notice.
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