Bronkhorst® model F-101E Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,028…1,4 ln/min and 0,24…12 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).
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, EtherCAT®, PROFINET 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.
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 |
| Temperature sensitivity |
< 0,1% FS/°C |
| Pressure sensitivity |
0,1% Rd/bar typical N2; 0,01% Rd/bar typical H2 |
| 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 |