These are professional and high-accuracy liquid mass flow sensors for ultra-low flow rate monitoring. We offer a full range of 6 microfluidic flow sensors from 7 nL/min to 40 mL/min to perfectly match your needs. The water-resistant version (IP54 certified) is now the only version available.
General
Six different microfluidic sensors are available depending on the flow range you want to achieve (from 7 nL/min up to 40 mL/min). Performances, resolution, and precision are adapted to experiments in microfluidics that require high accuracy.
The flow sensor shows bi-directional and linear transfer characteristics.
| Flow Sensor |
MFS1 |
MFS2 |
MFS3 |
MFS4 |
MFS5 |
MFS6 |
| Flow Rate Range (water) |
0 to ± 1.5 µL/min |
0 to ± 7 µL/min |
0 to ± 80 µL/min |
0 to ± 1 mL/min |
0 to ± 5 mL/min |
0 to ± 40 mL/min |
| Flow Rate Range (IPA) |
- |
0 to ± 70 µL/min |
0 to ± 500 µL/min |
0 to ± 10 mL/min |
- |
0 to ± 40 mL/min |
| Classic (discontinued) |
✅ MFS1 |
✅ MFS2 |
✅ MFS3 |
✅ MFS4 |
✅ MFS5 |
❌ |
| Water Resistant (IP54) |
✅ MFS1+ |
✅ MFS2+ |
✅ MFS3+ |
✅ MFS4+ |
✅ MFS5+ |
✅ MFS6+ |
| Compatibility |
OB1 MK3+, OB1 MK4, Sensor Reader |
OB1 MK4, Sensor Reader (V3 only) |
The product comes fully calibrated for water. The MFS Thermal Flow Sensor can work in digital mode and it needs to be connected to the specific Sensor Reader (click here for more information). The Sensor Reader is sold separately and can manage up to 4 different sensors at the same time. Thanks to the integrated software you will able to record, store and analyze the data gathered by the sensor directly on your computer.
Please make sure you use filtered solutions to prevent any dust from clogging the sensor capillary, which would eventually damage it irremediably.
Working Principle
A calorimetric thermal low-flow liquid flow meter measures the asymmetry of a temperature profile modulated by the fluid flow by using 2 different heat sensors surrounding a central heating element.
Application
Create your complete microfluidic setup with the MFS Thermal Flow Sensor and the Sensor Reader. They are both compatible with several flow control instruments (syringe pump, peristaltic pump, and pressure controllers). Our dedicated software and its user-friendly interface allow you to control the data acquisition directly on your pc.
Content
1x MFS+ Flow Sensor
Specifications
Sensor Performance
| Flow Sensor |
MFS1+ |
MFS2+ |
MFS3+ |
MFS4+ |
MFS5+ |
MFS6+ |
| Media calibration |
Water |
Water |
IPA |
Water |
IPA |
Water |
IPA |
Water |
Water |
IPA |
| Flow rate range |
0 to ± 1.5 µL/min |
0 to ± 7 µL/min |
0 to ± 70 µL/min |
0 to ± 80 µL/min |
0 to ± 500 µL/min |
0 to ± 1 mL/min |
0 to ± 10 mL/min |
0 to ± 5 mL/min |
0 to ± 40 mL/min |
0 to ± 40 mL/min |
| Sensor output limit |
± 1.7 µL/min |
± 8 µL/min |
± 100 µL/min |
± 120 µL/min |
± 600 µL/min |
± 1.1 mL/min |
± 11 mL/min |
± 5.5 mL/min |
± 65 mL/min |
± 65 mL/min |
Accuracy
(whichever is larger) |
± 10% m.v. or 7.5 nL/min |
± 5% m.v. or 0.02 µL/min |
± 20% m.v. or 0.21 µL/min |
± 5% m.v. or 0.12 µL/min |
± 20% m.v. or 5 µL/min |
± 5% m.v. or 2 µL/min |
± 20% m.v. or 100 µL/min |
± 5% m.v. or 10 µL/min |
± 5% m.v. or 50 µL/min |
|
Repeatability
(whichever is larger) |
< 1% m.v. or 0.9 nL/min |
± 0.5% m.v. or 3.5 nL/min |
± 1% m.v. or 7 nL/min |
± 0.5% m.v. or 8 nL/min |
± 1% m.v. or 0.25 µL/min |
± 0.5% m.v. or 0.2 µL/min |
± 1% m.v. or 5 µL/min |
± 0.5% m.v. or 1 µL/min |
± 0.5% m.v. or 10 µL/min |
|
Fluidic Specifications and Connections
| Flow Sensor |
MFS1+ |
MFS2+ |
MFS3+ |
MFS4+ |
MFS5+ |
MFS6+ |
| Capillary diameter |
25 µm |
150 µm |
430 µm |
1.0 mm |
1.8 mm |
1.4 mm |
| Internal volume |
1 µL |
1.5 µL |
5 µL |
25 µL |
80 µL |
58 µL |
| Fitting type |
UNF 1/4-28 Flat Bottom + 6-40 to 1/4-28 adapter |
UNF 1/4-28 Flat Bottom |
| Recommended torque |
0.5 Nm ± 10% |
| Min recommended tubing ID |
25 µm |
150 µm |
430 µm |
1 mm |
2 mm |
2 mm |
Pressure drop
at full scale, 23°C |
1 bar |
3 mbar |
60 mbar |
1 mbar |
7 mbar |
< 1 mbar |
5 mbar |
< 1 mbar |
< 4 mbar |
Additional Specifications
| Measurements |
Bi-directional (positive and negative flow rates) |
| Sensor response time |
40 ms |
| Swept volume |
< 1 µL |
| Chemical resistance |
The interior channel is made in PEEK and is bio-compatible |
| Effect on flow rate |
The sensor has no influence on the flow rate of the liquid passing through |
| Operating temperature |
+10 °C to +50 °C |
| Electrical input |
8 V / 100 mA |
| Signal output |
Digital only (requires a Sensor Reader or OB1 Mk3+/Mk4 Pressure Controller or Cobalt Autonomous Pump) |
| Dimensions |
58 x 52 x 23 mm (length x width x height) |
| Weight |
102 g |
Documentation
MFS Flow Sensor User Guide
MFS Flow Sensor calibration application note
