Bronkhorst® model F-111AI Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,4…20 ln/min and 2…100 ln/min with pressure rating between vacuum and 100 bar. The MFM consists of a thermal mass flow sensor and 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. The IN-FLOW model is of rugged design (IP65) for use in industrial environments or even Zone 2 hazardous areas, with optional ATEX Cat. 3 approval.
IN-FLOW series are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. The main digital pc-board contains all of the general functions needed for measurement and control. 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. The IN-FLOW model features optional Multi Gas / Multi Range functionality, providing (OEM-) customers with optimal flexibility and process efficiency.
High accuracy, excellent repeatability
Optional Multi Fluid / Multi Range functionality
Virtually pressure and temperature independent
Rugged, weatherproof housing (IP65, dust and waterproof)
Compact design
| Measurement / control system |
|
Accuracy (incl. linearity)
(based on actual calibration)
|
±0,5% Rd plus ±0,1% FS |
| Turndown |
1:50 (in digital mode up to 1:187,5) |
| Multi fluid capability |
storage of max. 8 calibration curves;
optional Multi Gas / Multi Range functionality up to 10 bar abs
|
| Repeatability |
< 0,2% Rd |
|
Response time
|
typical: 0,5 seconds |
| Operating temperature |
-10…+70°C;
for ATEX cat. 3 0…50°C |
| Temperature sensitivity |
zero: < 0,05% FS/°C; span: < 0,05% Rd/°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 |
| Attitude sensitivity |
max. error at 90° off horizontal 0,2% FS at 1 bar, typical N2 |
| Warm-up time |
30 min. for optimum accuracy
2 min for accuracy ± 2% FS |