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 M14 Mass Flow Meter (MFM) is suited for highly accurate measurement of gas or liquid flow ranges between 0,03…1 kg/h and 0,3…30 kg/h (which corresponds with 0,4…13,3 ln/min up to 4…400 ln/min when used on nitrogen) at operating pressures up to 200 bar (higher on request). 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.
Thông số kỹ thuật
| Measurement / control system |
| Mass flow accuracy |
Liquid: ±0,2% of rate;
Gas: ±0,5% of rate |
| Turndown |
up to 1:100 |
| Repeatability |
±0,05% of rate ± ½(ZS* x 100/flow)% based on digital output |
| Zero Stability (ZS)* |
< ±6 g/h |
| Response time, meter (t98%) |
≤ 200 msec |
| Operating temperature |
0…70°C;
for ATEX Cat.3, Zone 2 max. 50°C |
| Temperature effect** |
on zero: < 0,5 g/h/°C;
on span: < 0,001% Rd/°C;
self heating (at zero flow): ≤ 15°C |
| Temperature accuracy |
±0,5°C |
| Density accuracy |
< ±5 kg/m3 |
| 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 |