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Body, brains, and goes with the flow.

Five fluidics paths

Five Fluidic Schemes

Choose from five fluidic paths including selectors, injectors, switchers and a unique pH sensor integrated into a valve.

Designed with Biotech in mind

Built for Biotech Instruments

25 MPa pressure capability and PEEK construction throughout makes FluidSwitch compatible with buffers and other liquids commonly used in life science and biotechnology instruments.

Integrated drive and electronics

Integrated Drive and Electronics

A drive actuator, position sensor and full featured software make integration of FluidSwitch valves straightforward.

USB Connection

USB Control

Plug a powered FluidSwitch valve into a USB port and start commanding the valve within moments.

Customize FluidSwitch functions using Python

Python Examples

Start by following Practichem’s open source Python 3 libraries for understanding. Modify the standard code to customize FluidSwitch functions.

Summary Passage Diameter Ports Recommended
Path Volume Max Operating
Mobile Phase Selector

Select from eight ports. Comparatively large passages minimize flow resistance.

1.2 mm (0.047 in) low inlet restriction

5/16-24 Flat Bottom

4.8 mm (3/16 in)

Any port to common: 23 μL

700 kPa (100 PSI)

Sample Injector

Introduce samples via a microvolume injection port.

0.25 mm (0.010 in) and 0.5 mm (0.18 in)

10-32 Coned Bottom

1.6 mm (1/16 in)

Needle path: 3.4 μL

Loop path: 7.3 μL

25 MPa (3600 PSI)

Channel Selector

Select from four two-port devices. Connect up to four columns or four sample loops. Flow can be reversed.

0.5 mm (0.018 in)

10-32 Coned Bottom

1.6 mm (1/16 in)

4.3 μL

25 MPa (3600 PSI)

pH Sensor

Sense pH. Switch between measure, calibrate and bypass.

0.5 mm (0.018 in)

10-32 Coned Bottom

1.6 mm (1/16 in)

4.3 μL

275 kPa (40 PSI)

Eluent Diverter

Select from eight ports. Low internal volumes maintain separation.

0.5 mm (0.018 in)

10-32 Coned Bottom

1.6 mm (1/16 in)

4.3 μL

25 MPa (3600 PSI)



75 mm


40 mm


180 mm


~970 g


24 - 36 VDC


2 A (maximum)

Maximum pressure

25 MPa (pH sensor is limited to 275 kPa)

Compatible fluids

Non-abrasive liquids compatible with PEEK

Fluid contact materials

Polyether ether ketone (PEEK)

Switching time (maximum transit)

12 seconds

Switching time (minimum transit)

3 seconds

Cycle lifetime

50000 operations (defined as a minimum distance port-to-port switch)