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Parallel reaction station for heating, cooling, stirring and refluxing up to 12 samples
The Carousel 12 Plus Reaction Station™ is a patented parallel synthesis system that simultaneously heats or cools, stirs and refluxes up to 12 reactions under an inert atmosphere. Designed as a personal synthesis workstation, it supports parallel reaction screening and solid-supported reagent synthesis while providing consistent reaction conditions across all positions.
The system is compatible with the Carousel Stirring Hotplate and features a compact footprint for efficient use of laboratory bench space.
Heating and cooling performance
- Simultaneously heats up to 12 reactions from ambient temperature to 180 °C
- Supports temperatures up to 220 °C for short periods
- Provides temperature control accurate to ±1 °C
- You can control temperature by using the integrated digital controller of the Carousel Stirring Hotplate or an optional Pt1000 temperature sensor
- It is possible to position an optional Pt1000 sensor in the aluminum heated base or directly in the reaction solution through the silicone Suba-Seal septum
- Allows temperature control based on either block temperature or reaction solution temperature
- Optional HDPE cooling reservoir enables cooling to temperatures as low as -78 °C
Uniform stirring performance
The patented Carousel design provides powerful and even stirring in every reaction tube. By positioning each tube and magnetic stirrer bar at an equal distance from the centrally located magnet of the stirring hotplate, all reactions are stirred at the same speed.
Rare-earth cross-shaped magnetic stirrer bars provide vigorous mixing over a stirring range of 100 to 1400 rpm.
Efficient refluxing
A removable water-cooled aluminum reflux head provides efficient refluxing for all reaction tubes, reducing solvent evaporation and loss during synthesis.
Cooling water circulates through the reflux head, creating a cooling zone where solvent vapors condense and return to the reaction mixture. Quick-release water couplings with integrated shut-off valves simplify connection of the cooling water supply while helping prevent leaks and dripping.
The removable reflux head allows all reaction tubes to be transferred together between the heated base, the stand or the optional cooling reservoir, providing flexibility during synthesis, cooling and sample handling.
Reactions under an inert atmosphere
The Carousel 12 Plus includes an integrated radial gas distribution system for performing reactions under an inert atmosphere. A central vacuum or gas connection distributes inert gas to all 12 reaction tubes through gas-tight Easy-On PTFE caps. By alternating between vacuum and inert gas, unwanted air can be removed quickly, making the system suitable for reactions that require moisture- or oxygen-free conditions.
Easy-On PTFE caps
Each reaction tube uses a chemically resistant Easy-On PTFE cap featuring a quick-thread attachment and push-fit connection to the radial gas distribution system.
Each cap includes:
- An on/off valve for isolation from the gas system
- A replaceable silicone Suba-Seal septum for adding reagents or withdrawing samples with a syringe
Durable reaction tubes
The Carousel 12 Plus accepts up to 12 heavy-walled borosilicate glass reaction tubes that maximize heat transfer from both the heated base and the cooled reflux head.
Available reaction volumes include:
- Standard tubes: 5 to 20 mL
- Reduced-volume tubes: 1 to 5 mL
The precision-engineered glass tubes ensure that all reactions are heated and cooled at the same rate.
Practical design features
- Circular layout provides visibility of every reaction tube and allows the unit to be rotated for access without leaning into a fume hood
- Viewing slots in the heated base enable continuous observation of reaction contents during synthesis
- Fluoropolymer-coated surfaces provide chemical resistance and facilitate cleaning
- Removable two-piece PTFE insulating plate reduces heat loss, shortens heat-up times and can improve energy efficiency by up to 36%
- Optional Carousel stand supports the reflux head, with or without reaction tubes, during loading, between reactions or when rapid air cooling is necessary
- Fluoropolymer-coated stand includes an integrated drip tray to collect condensation and improve stability
Key features
- Simultaneous heating, cooling, stirring and refluxing of up to 12 reactions
- Heating from ambient to 180 °C (220 °C for short periods)
- Optional cooling to -78 °C
- Temperature control with ±1 °C accuracy
- Powerful magnetic stirring from 100 to 1400 rpm
- Water-cooled removable reflux head
- Integrated vacuum and inert gas distribution system
- Fluoropolymer coating for improved chemical resistance and easier cleaning
- Easy-On PTFE caps with quick-thread attachment
- Compact design with excellent visibility of all reaction tubes
