micro-Flask by Duetz: Eliminate well-to-well variability in microtiter plates

uFlaskThe Micro-Flaslk system is a simple and powerful set of tools for improving the quality of experiments performed in micro-titer plates. Using a unique "sandwich cover" plate closure, it is possible to eliminate well-to-well variability in flasks, dramatically improve gas transfer in cultures, and achieve outstanding results from high-throghput experimentation.  


Scale down to micro-liter volumes without sacrificing culture quality.

Micro-Flasksby Duetz maximize experimental throughput by improving your 96-, 24-, or 6-well microtiter plates. The system consists of specialized plate covers and clamps that transform any microtiter plate into a miniature bioreactor.

Key features:

  • An easy-to-use system for the rapid handling strains/clonal libraries, mutant banks, and cell lines in 96-, 24-, or 6-well microtiter plates.
  • Up to 10X faster screening campaigns versus traditional handling methods.
  • Shake-flask equivalent cultivation in terms of oxygen transfer rates and reproducibility
  • Elimination of well-to-well variability in microtiter plates
  • Automation-friendly plate covers
  • Covers and clamps for any standard microtiter plates


uFlask gas transfer-webImproved Oxygen Supply and Reduced Evaporation

The Micro-Flaskby Duetz system consists of a specialized microtiter plate closures ("sandwich covers") and clamps to hold the closures in place. Micro-Flasksby Duetz are designed to provide a headspace refreshment rate of 1-2 working volumes per minute in orbial shakers, permitting oxygen concentrations of at least 18% (v/v), even when oxygen uptake rates are as high as 40 mmol O2 L-1 h-1. Evaporation at these conditions is kept at a minimum (as low as 2% per day), which permits culture times that are weeks long.
The sandwich covers consist of sterilizable, re-usable layers that provide a positive seal on each well of the plate (thus preventing cross-contamination and eliminating well-to-well variability), promote gas transfer, slow evaporation, and prevent contamination.
Sandwich Cover Anatomy

A. Stainless steel lid for rigid support
B. Microfiber layer
C. Expanded Teflon or ePTFE
D. Stainless steel foil (for some covers)
E. Soft silicone layer


System Components

Simple, versatile, and re-useable components for any microtiter plate:

Step 1: Choose a clamp low-well-clamp-web

Easy-to-use clamps hold up to 16 microtiter plates and attach easily to all major brands of orbital shakers. Clamps are available for low-well plates, deep-well plates, and they are compatible with nearly every orbital shaker currently on the market. 

Step 2: Choose a sandwich coverLWP with cover

Covers for deep-well plates permit culture volumes up to 4mL and are ideal for medium optimization or protein production.
Covers for low-well plates permit high-throughput cultivations at volumes up to 1mL and are ideal for library screening.

Step 3: Choose any accessoriesgastight box

The gastight box allows anaerobic or custom COenvironments in your standard shaker.
The cryo-replicator and press facilitates reliable inoculation from freezer stocks without thawing of your parent plates.

Technical Data

Use Micro-Flasksby Duetz to get the most from your plates and orbital shaker.

Micro-Flasksby Duetz provide ideal well-to-well uniformity and gas transfer for any microtiter plate. In addition to the sandwich cover, other factors (e.g., well geometry, shaker speed, and shaker orbit) can influence the cultivation environment in a plate. The table below describes the available oxygen transfer rates and evaporation rates that are achievable when Micro-Flasksby Duetz are used with several types of plates.

gas transfer

(click to enlarge in a new window)

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