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Tweak your cartridge.
Transform your assay.

MXR - microfluidic mixer

Introducing the fastest, most adaptable microfluidic mixer in the world.
Speed up your assays, shrink your system, and reduce your assembly costs.

Meet the world’s fastest, most adaptable microfluidic mixer.

MXR stirs up a chamber in seconds. This feat is powered by Redbud Posts, microscopic features that move like tiny stir bars to agitate microliter volumes of fluid. MXR is perfect for 1–100 µL volumes and 0.1 – 1 mm tall chambers.  

This isn’t the first method for microfluidic mixing, but it might be the first you’ll actually use. MXR can rehydrate dried reagents, blend two liquids, or speed up liquid-phase reactions.

Learn more about microfluidic mixing

MXR enables 10x faster microarray assays

A whole new kind of kinetics

You wouldn’t expect great results from a chemistry lab without a shaker or rotator. Don’t expect to get away with concentration gradients when your assay moves from the bench to a cartridge.

MXR makes any chamber a mixing chamber, with no pumps, bubbles, or vibration. It’s even compatible with optical and electrical sensors. The result is faster reaction kinetics, better analyte utilization, and better analytic consistency.

See how mixing makes assays 10x faster.

MXR easily integrates into diagnostic consumables

Make any chamber a mixing chamber

MXR uses a patent-pending modular design that makes adding mixing to your existing cartridge a breeze. MXR won’t constrain the design of your cartridge or instrument, and it might even lower your assembly costs.

Whether your design is based on an injection molded chassis or laser-cut laminates, whether it’s powered by capillary action or pneumatic fluid control, MXR can work with your processes. Zero dead volume, no pumps, and no new tooling tolerances. Just mixing, right where you need it.

Learn how easy it is to add MXR to your cartridge.

MXR Tech Specs

Standard format

Custom format

Chamber volume 17 µL 1 – 200 µL
Chamber height 360 µm 70 µm – 1.5 mm
Chamber footprint 10 mm x 5 mm 0.25 mm (minimum dimension)
Chip thickness 1.9 mm 300 µm or greater
Chip footprint 12.5 mm x 17.5 mm 2 mm (minimum dimension)
Fluid input port P20 pipette vents Contact us
Surface chemistry Polydimethylsiloxane Contact us
Sidewall adhesive Permanent hydrophilic bond Various: Hydrophobic, temporary, etc.
Temperature range 20 – 70ºC Contact us
Minimum sample surfactant
SDS 1.0% Contact us
IGEPAL CA-630 0.1% Contact us
Triton X-100 0.1% Contact us

Latest news:

PRESS RELEASE- Redbud Labs Expands Leadership Team

Redbud Labs has announced new members of leadership as the company poises for upcoming growth. Experienced leaders in the pharmaceutical/life sciences industry, Kathryn Lawrence and Dale Barnes join Jay Fisher who continues leadership of R&D efforts. Kathryn will head the commercial team and Dale Barnes will lead manufacturing efforts. To learn more, visit

See Redbud @ Lab on a Chip World Congress

Redbud Labs is proud to be a sponsor of the Lab on a Chip World Congress in Coronado Island CA. Richard Spero, CEO, will be giving a talk titled Low-Concentration Samples: The Next Diagnostic Frontier on Wednesday, October 3rd at 9:00am. Come hear the latest on MXR,...

Redbud Labs announces new headquarters

Redbud Labs announced today a move to the newly renovated 400 building on the Frontier campus in Research Triangle Park. Our headquarters will comprise 8,000 square feet, including a production suite for manufacturing of MXR and future products. Laboratory spaces will...

PRESS RELEASE-MXR now available for microfluidic ChipShop products

microfluidic ChipShop GmbH today announced that its products are now available with MXR, the world’s fastest, most adaptable microfluidic mixing chip. By adding MXR to microfluidic ChipShop products, assays can benefit from mixing when, where, and how they need it. Thanks to its unique, pop-in design, MXR offers easy integration with any product in the ChipShop catalogue.


We collaborate with your engineers to develop cost-effective solutions tailored to your cartridge design.

Contact us to get started.

Redbud Labs

Offices, Production, and Labs
400 Park Offices Dr. #301
RTP NC 27709


PO Box 13195
RTP NC 27709

(919) 537-9753

Copyright 2019 Redbud Labs