Bidirectional Microfluidic Flow Sensor

  • Best Seller

FLOW UNIT/ FLOW UNIT +

The FLOW UNIT and FLOW UNIT+ are bidirectional microfluidic flow sensors compatible for stand-alone use with the Line Up™ controller or other microfluidic control systems such as the MFCS™ series using the Flowboard hub. 

Available in multiple low rate ranges, the FLOW UNIT and FLOW UNIT + Microfluidic Flow Sensor allows for pressure regulation using the DFC (Direct Flow Control) algorithm to monitor or control the system by flowrate instead of pressure.

FLOW UNIT microfluidic flow sensor
Main benefits
  • compact
    Compact

    Uses minimum bench space

  • Adaptable

    Use with or without a PC

  • Intuitive

    Straight forward set up & use

  • Wide range

    Measurement from nL to mL

Features of Flow Unit Microfluidic Flow Sensor

Tune Measurements for Various Liquids

When combined with a FLOW UNIT, a scale factor can be added to your measurements when handling other fluids than the liquid for which the flow sensor is calibrated for. 

For organic solutions, a second calibration with isopropyl alcohol is built-in on the FLOW UNIT models S, M+ and L+.

Flow Rate Measurement

Fluigent’s Microfluidic Flow Sensor is a unique tool to easily monitor flow rates in any microfluidic system with the best precision and accuracy. A microheater provides a minimal amount of heat to the medium monitored. Two temperature sensors, located on both sides of the heat source, detect temperature variation. The high precision thermal sensor technology provides total media isolation and very low internal volume with no moving parts. The flowrate is then calculated based on the thermal desorption, which is directly related to the flowrate.

The FlOW UNIT and FLOW UNIT+ enable fast and accurate measurements of ultra-low liquid flow rates.

Monitor & Control Experiments

Flowrate measurements (bidirectional) for all FLOW UNITs are displayed in FLUIGENT software. An additional function displays and records the dispensed volume for each FLOW UNIT Microfluidic Flow Sensor. Flowrates can be directly controlled with the MFCS™ series and LineUp™ series instruments using the DFC, a “self-learning” flow rate control algorithm.

Precision for Various Flow Rate Ranges

The different FLOW UNIT models offer an extensive choice of flowrate ranges to best match your needs over the range of 7nL/min to 5mL/min.

Locally Control Flow Rate

Combined with a LineUp™ Push-Pull or a LineUp Flow EZ™, one can monitor or control flow rate without a PC.

Related applications

Specifications

Sensor performance

Sensor modelXSSM+L+
Part NumberFLU-XSFLU-S-DFLU-M+FLU-L+
Calibrated mediaWater
Water
IPA
Water
IPA
Water
IPA
Range0±1.5µL/min

0±7µL/min

0±70µL/min
0±2mL/min

0±40mL/min

Accuracy (m.v.= measured value)
also applies to negative values
Water
10% m.v. above 75 nL/min
7.5 nL/min below 75 nL/min




Water
5% m.v. above 0.42 µL/min
21 nL/min below 0.42 µL/min

IPA
20% m.v. above 4.2 µL/min
210 nL/min below 4.2 µL/min
Water
5% m.v. above 10 µL/min
0.5 µL/min below 10 µL/min

IPA
10% m.v. above 50 µL/min
5 µL/min below 50 µL/min
Water
5% m.v. above 1 mL/min
50 µL/min below 1 mL/min

IPA
10% m.v. above 2 mL/min
200 µL/min below 2 mL/min
Lowest detectable flow increment3.7 nL/min10 nL/min0.25 µL/min25 µL/min
RepeatabilityWater
<1% m.v. above 90 nL/ min
0.9 nL/min below 90 nL/min
Water
0.5% m.v. above 0.7 μL/ min
3.5 nL/min below 0.7 μL/ min

IPA
1% m.v. above 0.7 μL/ min
7 nL/min below 0.7 μL/ min
At 23°C Water & IPA
0.5% mv above 100μL- min
0.5μL/min below 100μL/ min
At 23°C Water & IPA
0.5% mv above 2mL/ min
10μL/min below 2mL/ min

Mechanical specifications

Sensor modelXSSM+L+
Sensor diameter25 µm150 µm 400 µm 1.4 mm
Maximum pressure200 bar200 bar 100 bar 15 bar
Wetted materialsPEEK
& Quartz Glass
PEEK
& Quartz Glass
PPS, stainless steel 316L
Fittings: PEEK/ ETFE
PPS, stainless steel 316L
Fittings: PEEK/ ETFE
Inner volume1µL1.5µL~ 28µL~ 58µL
Fluid connector portsUNF 6-40 for 1/32” OD tubingUNF 6-40 for 1/32” OD tubingUNF 1⁄4′′-28 flat bottom for 1/16” OD tubingUNF 1⁄4′′-28 flat bottom for 1/16” OD tubing
Weight97 g97 g97 g97 g

If one is looking for our all time alternative: our former FLOW UNIT L & FLOW UNIT M are still available


Sensor performance

Sensor modelML
Part NumberFLU-M-DFLU-L-D
Calibrated mediaWater
IPA
Water
IPA
Range0±80µL/min

0±500µL/min
0±1mL/min

0±10mL/min
Accuracy (m.v.= measured value)
also applies to negative values
Water
5% m.v. above 2.4 µL/min
0.12 µL/min below 2.4 µL/min

IPA
20% m.v. above 25 µL/min
5 µL/min below 25 µL/min
Water
5% m.v. above 0.04 mL/min
1.5 µL/min below 0.04 mL/min

IPA
20% m.v. above 0.5 mL/min
100 µL/min below 0.5 mL/min
Lowest detectable flow increment0.06 µL/min0.7 µL/min

Mechanical specifications

Sensor modelML
Sensor diameter430 µm1.0 mm
Maximum pressure100 bar12 bar
Wetted materialsPEEK and Borosilicate
Glass
PEEK and Borosilicate
Glass
Fluid connector portsUNF 6-40 for 1/32” OD tubingFlangeless fitting 1/4-28
Weight97 g97 g

OxyGEN

Control in real-time, protocol automation, data record and export
ver. 1.0.0.0 or more recent

See the offer


Software Development Kit

Custom software application
ver. 21.0.0.0 or more recent

See the offer

Flow rate control without a PC
Flow rate control with Fluigent software

Expertise & resources

Related products

Kits