TrayMix S4

TrayMixTM S4

Fully Automated Hybridization Station


Automation and Active Mixing 
Get consistent and reproducible results
Reduce the time and the cost per analysis 

The automated hybridization and wash station TrayMix™ S4 is a micro-mixer using a patented active mixing by Chaotic Advection technology which belongs to BioTray®.

Best results are obtained thanks to an homogeneous dispersion of molecules over the whole hybridization area (21 x 60 mm). The patented Active Mixing by Chaotic Advection system achieves a significant reduction of hybridization times with the use of lower samples quantity (5 pmoles) ; a higher specificity can be reached (high reduction of background noise, increased fluorescent signal intensities). The patented Active Mixing by Chaotic Advection system eliminates artefacts such as dead zones or bubbles usually observed with other systems so that you can succeed in your hybridization and wash experiments from the start.

The system is fully automated in order to avoid any errors and in order to get reproducible results. The hybridization station TrayMix™ S4 is piloted with a intuitive and user friendly software called WinTrayMix™ and it can be used even by non-experts. The biologist can use a clear and simple graphical user interface to enter the parameters of the various ante and post hybridization steps : pre-hybridization, hybridizations and several washes.
For the best benefit of our customers, two operational modes are available : the Expert Mode allows the users to customize their own protocole with the possibility to program complex experiments with multistep hybridizations. This mode is rather dedicated to research laboratories. The Routine Mode will be used by hospitals and diagnostic laboratories to run robust protocols used in their diagnostic assays. The automated hybridization station TrayMix™ S4 can run denaturation operations too.

Improvements of TrayMix™ S4 over TrayMix™ S2 are :
  • Reduction of the microfluidic mixing loops : 250 µL against 513 µL in the previous system. This reduction allows using less reagent and working with increased sample concentration which, combined with the active mixing technology, increased the specificity of hybridization (reduced background noise and higher spot intensities).
  • Improved temperature regulation (+/- 0.1°C)
  • Denaturation steps are possible
  • Hybridization with several temperatures stages can be set in a easy way (Expert Mode).
With the Automated Hybridization and Wash Station TrayMix™ S4, improve your analysis results in applications such as gene expression profiling, genotyping, SNP genotyping, chromosomal abnormalities and genetic disorders detection, Comparative Genomic Hybridization (CGH), Fluorescent In Situ Hybridization (FISH), protein arrays experiments (for instance DNA/Protein interactions, Protein/Protein interactions).
Reference Description
HS-TMX_S4 Fully automated Hybridization station TrayMix™ S4 (4slides)
1 year Guarantee for labor and parts.
1 year for WinTrayMix™ software updates and technical support

Download the flyer TrayMix™ S4


The Regulated temperature ranges from the ambient to 75°C with a precision of +/- 0.1 °C. This allows running denaturation operations. The solutions and reagents are brought to the microfluidic loops and the hybridization chamber thanks to a five-ways collector according to the steps of your protocols which have previously been entered into the WinTrayMix ™ Software.

Denaturation, pre-hybridization, hybridization, washing and decontamination steps are fully programmable.
The drying steps is made outside the system using our microarray high speed centrifuge. Centrifugal force happens to be the most effective system to remove residual humidity on microarray surfaces : it leads to better results. The use of dry and inert gas has specifically been avoided because drying with gas creates stains.

 Dimensions: L x P x H  52,6 x 46,5 x 21 cm
 Weigth:  19 Kg
 Capacity:  4 slides that can be used independently or in parallel.
 Hybridization Area:  21 x 60 mm
 Hybridization Volume:  Hybridization Chamber: 60 µl
 Microfluidic loop: 250 µl
 Microfluidic System:   Manifold + chamber + capillaries. Chemically resistant and compatible with all commonly used reagents.
 Biological Target injected quantities:  5 to 50 pmoles injected with a simple pipette.
Sample volumes:  from 5 µl to 60 µl
Temperature range:  25° à 75°C (+/-0,1°C)
 Programming:  WinTrayMix™ software.
Operationg system: Windows XP, Vista & Seven.
Operation modes: Routine & Expert
WinTrayMix™ Software Save and download your protocols.
6 automated and programmable procedures: Denaturation, Pre-hybridization, Hybridization, Washes and Decontamination. Execution modes: routine or expert.
Treacability of the operations and full report edition in HTML.


4 slides.jpg
Fig.1: Hybridization chambers

Fig.1: With the Automated Hybridization Station TrayMix™ S4, 4 hybridization chambers can be independently used. Hybridization chambers are part of the instrument ; there is no extra consumable chambers to buy ! They can be programmed with the WinTrayMix™ software to execute in parallele either the very same protocol or totally different protocols from one chamber to the other. This flexibility makes it possible to do in parallele a different hybridization experiment on each chamber.

Slide_insertion2.jpg chamber_ closing.jpg
Fig.2: Slide positioning Fig.3: Chamber closure

Fig.2 & Fig.3: Once the system has been programmed and the slide has been inserted, the hybridization buffer is automatically brought to the 50 µm high hybridization chamber. The volume of the chambers is mechanically define to get the very same volume for each chambers for a reproducibility purpose. A perfluoro-elastomer gasket is used only to get tightness between the chamber and the slide.

injection_port.jpg injection.jpg
Fig.4: Injection hole cover cap Fig.5: Injection hole

Fig.4 & Fig.5: The injection hole is located outside the chamber, straigth to the microfluidic loop. This system leads to a faster and more homogeneous mixing. Sample injection is made easy thanks to the injection hole : the user needs a simple pipette to inject sample through the injection port ; an automated anti-bubble system automatically eliminates any bubble the user might have create.
The Automated Hybridization and Wash Station TrayMix™ S4 automatically executes the operations following the sample injection (Denaturation, Pre-hybridization, Hybridization, Washes, Decontamination).
Several stages with different times and temperatures can be programmed and automatically executed to custom made some complex and optimized protocols.
After every protocols, the fluidic system and the hybridization chambers are automatically decontaminated to avoid contamination and to reduce maintenance efforts.


WinTrayMix™ is a comprehensive and flexible software with its intuitive and user friendly graphical interface. WinTrayMix™ software was specialy developed to be used by users of microarray ; it offers the following features:

  • Two operational modes: the routine mode for hospitals and the expert mode for research laboratories.
  • Protocols saving and loading for future use.
  • Independance of every operation :Denaturation, Pre-Hybridization, Hybridization, Washes,Decontamination of the system. These operations can be run automatically one after the other, following a programmed order or they can be executed step by step.
  • Traceability of the operations and edition of a complete report in html format.
Fig.1: Frontpage of the WinTrayMix™ Software

Fig.1: The frontpage of the WinTrayMix™ Software shows all chambers of the hybridization station. It is possible to choose the number of chamber to be programmed. The user can choose between routine mode and expert mode and then he can start setting each hybridization protocols for the selected chambers. The first scroll bar shows the progress of the whole protocol while the second scroll bar shows the state of progres of each operation in progress.

 Fig.2: Operational modes

Fig.2: When the hybridization station is detected by the software, the first step will be  to chose the operational mode between "Routine or Expert". Then the chambers, that will be used, have to be selected.
The WinTrayMix™ software offers four main operations in "Routine" mode and five in "Expert" mode.

Fig.3: Configuration of the operations

Fig.3: This screenshot shows the operations available and automated thanks to the TrayMix ™ S4 hybridization and wash station : Denaturation, Pre-Hybridization, Hybridizations, Washes, Decontamination of the system. The user can set the parameters of each operation, according to the protocol that he wants to follow or create. The operations can be selected on the left part of the screen and the temperature and time parameters can be entered on the right part of the sceen.

Fig.4: 3 Washes steps

Fig.4: Up to three different washes can be done with the system. Each wash can be selected as many time as needed in order to renew the wash buffers.

Fig.5 Fig.6

Fig.5: Every steps of a programmed protocol are visualized on the screen. The user can follow the states of progress of both the whole protocol and the ongoing operation. A count down (hours and minutes) appears between the two scroll bars during the hybridization step.

Fig.6: The "Expert" mode offers the possibility of a step-by-step programming.

The Hybridization procedure is used in order to select, configure and program the following operations : pre-hybridization, hybridization and washes.

The Decontamination procedure is used in order to clean and decontaminate the hybridization station. This operation must be run at 60/70°C, three times at least between each hybridization operation.

The Maintenance procedure is used in order to initialize, evacuate and change the reagents.

The Chronogrammes Step by Step procedure in Expert mode is used to configurate and add the steps of every operation, one by one and in the order the user want. For instance, it is possible to program an hybridization with several different temperatures stages for different times.

Hybridization Protocol Report : WinTrayMix™ offers the possibility to edit an hybridization report. This report can be personalized with the details of your experiment and the logo of your company or your institution.

Fig.7: Hybridization report

Fig.7: The WinTrayMix™ software creates a report in HTML format that can be read with any web browser. The date of the report creation and the parameters configurated by the user are shown in the report ; a table sums up the operations ran. In this table, only the configurated operations will appear (denaturation, pre-hybridization, hybridization and washes): the date, the hour of beginning, the duration set, the real duration, the temperature and the operation status (finished, cancelled ...) are shown for every operation.


BioTray®'s hybridization and wash stations use a patented technology of active mixing which is the exclusive property of BioTray®. This technology creates an active mixing using the Chaotic Advection phenomenon.
A comparative study between dynamic hybridization using BioTray's active mixing by Chaotic Advection technology and traditional static hybridization has been undertaken and revealed the following aspects:

Signal & CV (Coefficient of Variation):
Comparison of the TrayMix™ performances with static coverslip hybridization has shown that better signal intensity is achieved in two hours using the TrayMix™ than in 12 hours using static coverslip hybridization.

Table1: Average fluorescence values and coefficient of variation (CV) measured under different hybridization conditions (2 hours of hybridization).

Sample Concentration (0.1µM) Solution
Method Hybridization
Fluorescent Mean (a.u.) CV
Static Hybridization 50 5 Coverslip Non homogeneous 5500 0.33
353 35 TrayMix™ Homongeneous 11 823 0.17

Table 2: Average values for fluorescence and CV obtained with the same quantity of targets, both with and without agitation (2 hours of hybridization).

Sample Concentration (5 pmol) Solution
Method Hybridization
Fluorescent Mean (a.u.) CV
Static Hybridization 50 0.1 Coverslip Non homogeneous 5500 0.33
353 0.01 TrayMix™ Homongeneous 6452 0.16

NB: The CV of the system after 2 hours is equivalent to that of static systems with treatment under coverslip for 12 hours.

• Signal /Noise ratio & Specificity:
Microarrays hybridized for two hours with a single-stranded CY3 labeled DNA (84 mers) complementary to allele a. Hybridizations were performed with 5 pmol of target under the coverslip method and with the TrayMix™. Allele b was used as a control for hybridization specificity. All spot features were analyzed and compared to the local background signal for each of the experiments. Results comparing the mean signal to noise ratio of the fluorescent CY3 signals to the local background for allele a (black) and allele b (grey) of three experiments ± SD (Standard Deviation).

The figure shows that the specific signal/noise ratio (allele a - black bars) is enhanced from 3.5 to 4.2, while the non-specific signal/noise ratio (allele b - grey bars) is slightly reduced under the dynamic hybridization conditions of the TrayMix™. Comparisons of results after 12 hours of static hybridization are even more favorable to TrayMix™ (Data not shown). Chaotic mixing enhances the hybridization results in all important areas including time, homogeneity, and signal to noise ratio. In addition, the automation of this step is crucial for reproducibility. The system has thus been developed in view of attaining the levels of reproducibility essential for diagnostic purposes. Chaotic advection offers an even more significant advantage to passive hybridization when using high molecular weight molecules in applications such as Microarray Comparative Genomic Hybridization (aCGH).

• Conclusion and perspectives:
TrayMix™ offers a true innovation for enhancing hybridization efficacy, sensitivity, reproducibility and robustness while easy to use and flexible. The injection port is designed to allow small amounts of new reagents to be automatically and sequentially administered for pre- or post-hybridization processing (e.g. enzymatic reactions, chemical reactions, sandwich reactions, etc...). This permits conception of more complicated processes such as oligo elongation and multi-step reactions. Furthermore, the technology allows adaptation to either multiple slides or multiple reaction areas per slide. It is to be noted that the TrayMix™ technology is applicable to all types of microarrays such as, CHIP on Chip, protein and peptide, CGH, and FISH. This vast spectrum of applications makes the TrayMix™ a great investment of anyone processing microarrays.

• Technical Support:
About technical aspects information request, please contact by email This e-mail address is being protected from spambots. You need JavaScript enabled to view it or by phone : +33(0)4 27 02 19 83.


Fig.1: BioTray® offers the TechniCloth® wipers and advises their use in order to clean the hybridization station, the hybridization chambers, the hybridization cassette and any other metallic part. These wipers can be used with pure water or with pure or diluted ethanol ; with these wipes, cleaning is easy, without any contamination nor fluff on the cleaned surfaces.

Fig.2: TechniCloth® wipers are fabricated from a blend of 55% cellulose and 45% polyester. This fabric blend combines the highly absorbent properties of a natural fiber (cellulose) with the strength of a synthetic fiber (polyester). Designed for use in cleanroom and medical environment, these wipers are ideal for wiping and spill control with its low particle counts , low extractable levels and solvent compatibility.
Two sizes avalaible.
• 6"x6" (15 x 15 cm) size:Packaging: 600 wipers per bags.2 inner bags of 300 wipers
• 9"x9" (23 x 23 cm) size:Packaging: 300 wipers per bags.2 inner bags of 150 wipers

To ensure optimal sealing of the hybridization chamber, BioTray® provides a set of 12 O-rings in elastomer material.
An O-ring is a loop of elastomer with a round (o-shaped) cross-section used as a mechanical seal or gasket.

Reference Description
TX 606- TechniCloth® Wipers for hybrydization chambers cleaning
Size: 6"x6" (15 x 15 cm):
Packaging: 600 wipers per bags.
2 inner bags of 300 wipers
TX 609- TechniCloth® Wipers for hybrydization chambers cleaning
Size : 9’’x 9’’ (23 cm x 23 cm)
Packaging: 300 wipers per bags.
2 inner bags of 150 wipers
JT-FKM Gasket: Ø 49,9 mm x 1,78 mm - Pack of 12 Gasket.