Centrifuges, Stirrers & Shakers Innovative Magnetic Stirrer Speaks to Lab Equipment


A current problem for a wide range of chemists is when stirring a solution in the laboratory there is a need to check the properties of the solution and monitor how they change. In the paper, ‘Monitoring chemistry in situ with the Smart Stirrer — a magnetic stirrer bar with an integrated process monitoring system’ published in the journal ACS Sensors, researchers from the School of Engineering, the Mathematics Institute and WMG at the University of Warwick present their innovative stirrer sensor.


The small device, called ‘Smart Stirrer’, performed a function of a conventional laboratory stir bar, has an integrated microprocessor and various sensors capable of wireless and autonomous report the conversion of properties of a solution. The advanced sensor stir bar is a capsule shaped magnet encased in plastic. A beaker filled with a solution is placed on a platform that generates a rotating magnetic field, when the magnetic stirrer is placed in the solution it continuously rotates stirring the liquid. The Smart Stirrer then monitors: colour, transparency, conductivity, viscosity and temperature.


Results are sent to a computer over Bluetooth, and any changes notify the user wirelessly. Although the idea of using magnetic stir bar with integrated sensors may not be entirely new, this new affordable, multi-sensor and easy programmable stirrer sensor device is first in its kind. The concept is valuable to Research and Design laboratories and pharmaceutical and chemistry manufacturing industries because it allows wireless monitoring of several parameters of a chemical reaction simultaneously.


Dr Dmitry Isakov, from WMG at the University who led the study commented: “We are still continuing research into the stirrer, the next revision of the stirrer sensor that will be smaller size and with a bit more sophisticated sensors. We are collaborating with several chemists from Warwick University. This will help us to understand their needs and help to improve the device.”


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New Benchtop Shakers with Increased Shaking Capacity Introduced


Wiggens introduces the new WS-100D benchtop shaker, specifically designed for large or heavy workloads requiring accurate and repeatable results The instrument is ideal for a wide range of applications in the biological, molecular, medical, pharmaceutical, food and environmental fields. It performs orbital or reciprocating action and the variable-speed control provides gentle to vigorous agitation. The user-friendly operating and safety features ensures reliable shaking of laboratory glassware.


The user friendly control panel features a digital display and push knob adjustment for the speed, timer function and operating modes. The timer can be set forward and backward with a run and pause time of 1 to 999 min. A low-profile design minimises vibration or sliding caused by the high speed shaking motion. Shaking speeds up to 300rpm are offered with an adjustable amplitude size of 20mm, 30mm and 40mm.


The maximum load for the WS-100D benchtop shaker is up to 7.5kg. Heavier duty models of this series are also available, such as, WS-150D (maximum load up to 15kg) and WS-200D (maximum load up to 30kg).


A wide range of accessories makes it possible to use almost all shapes and sizes of vessels, such as, sticky plates, multi-purpose trays, adjustable bar trays, universal trays and multi-pore holders.


More information online: ilmt.co/PL/rZE2 52976pr@reply-direct.com


First High-speed Centrifuge/Magnetic Stirrer in One Unit


The MagFuge® from Heathrow Scientific is the industry’s first high-speed centrifuge and magnetic stirrer, combined into one unit. This design innovation enables a cost savings for labs by not having to purchase two pieces of equipment, a stirrer and a centrifuge, because the MagFuge® does it all.


The high-speed centrifuge is easy to use and designed to deliver maximum speed (12,500rpm/9,783x g) that is ideal for most protocols requiring fast spins with the versatility to handle 0.2, 0.5, 1.5, 2.0 and 5.0mL tube sizes.


The high-performance magnetic stirrer is designed using high-quality rare-earth magnets creating a robust magnetic coupling that significantly reduce the chance of spin-outs and is perfect for work with sensitive samples and protocols up to 3L requiring aggressive mixing for full dilution.


With a modern low-profile design, the MagFuge® is compact and has a small footprint for labs with limited bench space and limited height that ultimately helps reduced clutter in the lab. Both modules are intuitive and easy to use with one-button programming and require no tools for switching rotors or module changes. The unit is durable and equipped with optimal safety features.


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Centrifuge Your Samples in Style


The 15ml and 50ml myTube® products further extend the range of centrifuge tubes from Alpha Laboratories. Manufactured in diamond-finish moulds they provide a high-clarity, flawless internal surface that is super smooth to ensure clean release of dispensed samples. The leak-proof flat screw caps with large ridges provide optimal grip and enable convenient one-handed operation. AHN myTube® centrifuge tubes feature graduation marks that are printed in bold easy-to-read black ink which is highly resistant to physical and chemical corrosion. The tubes also come with a large white writing area for convenient sample labelling.


Alongside these large volume centrifuge tubes Alpha Laboratories offers the extensive APEX® range of microcentrifuge tubes with features designed to suit multiple applications for sample storage and processing. The flip-cap tubes in volumes from 0.5ml to 2.0ml offer the ‘Tough’ tubes that have an extra-secure closures and make them ideal for boiling applications. The ‘True-Lock’ tubes feature a locking mechanism on the cap to provide extra-security for your samples. Caps on the ‘Soft-Release’ tubes have a wide flange and are easy to open open-handed. The ‘No-Stick’ tubes are made from a proprietary homopolymer polypropylene with extra-low adhesion and are perfect for working with RNA and DNA.


The APEX® screw cap microcentrifuge tubes provide further options with the choice of conical bottom or free-standing tubes, tethered or separate caps. There is also a version with ‘Tamper-Evident’ screw caps for extra sample security. A range of different coloured caps are also available to support colour coding of your samples and together with the white labelled tubes offer multiple options for identifying your materials.


More information online: ilmt.co/PL/D0k1 50514pr@reply-direct.com


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