Bronkhorst® model F-103EI Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,9…45 ln/min and 4…200 ln/min (N2-equivalent). The instruments are particularly suited for corrosive gases or applications with very low differential pressure (∆P). Compared to conventional instruments, LOW-∆P-FLOW meters have larger flow channels to minimize the risk of clogging, facilitate cleaning and purging, and cause lower pressure drop (the sensor only requires 0,5 to 5 mbar). This model is of rugged design (IP65) for use in industrial environments or even Zone 2 hazardous areas, with optional ATEX Cat. 3 approval.
The integrated digital pc-board provides signal and fieldbus conversion as well as PID controller functionality for optional mass flow control by means of a (separately mounted) control valve. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide DeviceNet™, PROFIBUS DP, Modbus or FLOW-BUS protocols.
Large bore capillary (thermal bypass sensor)
Very low pressure drop
Less sensitivity to humidity or dirt
Suitable of corrosive gases
Easy to purge
Rugged, weatherproof housing (IP65, dust and waterproof)
Thông số kỹ thuật
| Measurement / control system |
Accuracy (incl. linearity)
(based on actual calibration) |
± 1% FS |
| Turndown |
1:50 (2...100%) |
| Multiple fluid capability |
storage of max. 8 calibration curves |
| Repeatability |
< 0,2% Rd |
| Response time (t63%) |
1...2 sec |
| Operating temperature |
-10…+70°C;
for ATEX Cat.3 0... 50°C |
| Temperature sensitivity |
< 0,1% FS/°C |
| Pressure sensitivity |
0,1% Rd/bar typical N2 |
| Leak integrity, outboard |
tested < 2 x 10-9 mbar l/s He |
| Mounting position |
horizontal |
| Warm-up time |
30 min. for optimum accuracy
2 min for accuracy ± 2% FS |