Spotlight Centrifuges, Stirrers & Shakers


Disc Centrifuge Chosen to Enhance Particle Characterisation Capability


Molecular Biologists Targeted With Launch of Linear Shaking Baths


Grant Instruments is targeting molecular biologists with the launch of its precision engineered GLS Aqua Plus series linear shaking water baths. The GLS Aqua Plus series includes a choice of two models (12 and 18 litre) and features a robust patented high quality magnetically coupled shaking mechanism that provides maximum reliability, consistency and quiet operation. The stylish new baths include a drain tap to allow easy tank emptying, two programmable temperature and shaking presets for rapid selection of commonly used set points, a countdown timer with audible buzzer, and non-drip polycarbonate lids. The see-through gabled polycarbonate lid not only improves performance of the baths but limits evaporation, reduces contamination and conserves energy.


The new models boast precision temperature control throughout the operating range of ambient +5°C to 99°C with ±0.1°C stability and uniformity. A wide range of accessories is also available for the GLS Aqua Plus range - including flask and test tube trays, test tube and microtube racks - to provide exactly the right solution for your application.


The GLS Aqua Plus series linear shaking baths have been designed for molecular biology applications such as hybridisation, producing bacterial culture media and for solubility studies. Like all Grant products, the new water baths are built to last and are manufactured using only the highest quality materials and come with a 3-year warranty as standard.


Analytik are pleased to announce that ParticlesCIC at the University of Leeds, have expanded their range of particle and material characterisation instrumentation to include the CPS DC24000 Disc Centrifuge. The ParticlesCIC is an established centre with an enviable track record of providing routine and problem solving services to industry; it is one of 12 accredited ‘Centres of Industrial Collaboration’ in Europe. Escubed Ltd, a spin out company from the ParticlesCIC that specialise in providing research services, will also have access to the instrument as they look to strengthen their analytical capability.


The CPS Disc Centrifuge is able to resolve multi-modal particle distributions with clean separation of narrow peaks that differ in size by as little as 2%. This ultra high-resolution performance is completely unique and offers the possibility to detect and measure extremely small changes and differences in particle size, especially in the sub-micron particle size range. Depending on particle density the CPS Disc Centrifuge can accurately and reproducibly measure particles between 2nm and around 75 micron. The CPS instrument also has high sensitivity, with a minimum detection limit below 10-8 gram active sample for narrow peaks, and analysis of samples of a few micrograms active weight is routine. With this level of high resolution, sensitivity and reproducibility, the range of applications is broad: powdered (water soluble) drugs and medications; virus particles; protein molecule clusters and virus-like particles (to below 20nm); polymer latexes (aqueous) with any particle density; emulsions of oils and waxes; ground and precipitated calcium carbonate; inorganic pigments and fillers; and ground sucrose, starch and flour.


Circle no. 378


The Aqua Plus family of water baths complement the existing Grant Optima™ series of stirred thermostatic baths and heating circulators and are part of Grant’s comprehensive range of scientific products. This includes block heaters and coolers, baths/circulators and re-circulating chillers, and under the Grant-bio brand, thermoshakers, rockers, rotators and shakers, centrifuges and vortex mixers.


Circle no. 377


New Programmable Hot Plates & Stirring Hot Plates


Torrey Pines Scientific announces its new EchoTherm™ Programmable Hot Plates and Digital Stirring Hot Plates for use with large samples in chemical, pharmaceutical, environmental, biochemical, electronic and other laboratories where temperature accuracy, accurate temperature profiles, ease of use, and reproducible sample preparations are a must.


The EchoTherm™ Models HP61 and HS61 Programmable Hot Plates and Programmable Stirring Hot Plates are rugged and designed for large samples. These units feature 10-programme memory with 10 steps per programme, temperature ramping, RS232 I/O port, membrane keyboard and full function liquid crystal display where all parameters are continuously visible.


Heater tops are available in ceramic or milled-flat cast aluminium. They are 12" by 12" square and have 1400-watt heaters. The aluminium top is recommended for working with solids directly on the heater plate surface.


Temperatures can be set to 450°C on the ceramic topped units and to 400°C on cast aluminium tops. The units are readable and settable to 1°C. Accuracy is 1% over the entire temperature range.


Temperature control is by PID software and is controlled to ±1°C or ±1ºF. Stirrer speeds can be set from 100 to 1500 rpm.


Temperature ramping can be set from 1ºC/hour to 450ºC/hour in 1ºC increments. The built-in timer can be set to 99 hours and is readable to 1 second. The units have an audible alarm with user settable auto-off for turning off the heater and stirrer when the timer counts down to zero. The units are supplied with an immersion probe for controlling solution temperatures directly.


All units are available in 100, 115, and 230 VAC, 50/60 Hz models. Circle no. 379


Revolutionary Solids Handling System for Marine Sanitation Systems


Severn Trent De Nora has introduced the use of a vertical self-discharging (VSD) centrifuge technology into its OMNIPURE™ Series 55 marine sanitation system’s solids handling equipment package. The new CentraSep®


VSD centrifuge technology, provided by Advanced Separation Technologies (AST), sets an industry benchmark for a ‘hands off’ solids waste handling approach for the offshore marine environment; providing a sanitary solids handling system with minimal operator attendance requirements.


The OMNIPURE technology utilises a unique electrolytic treatment technology combined with electrocoagulation in a proprietary and certified treatment process to effectively treat wastewater and provide sanitary solids for handling.


“During our full scale testing, the AST VSD centrifuge technology consistently demonstrated a ‘hands-off’, trouble-free operation,” said Dana Casbeer, Offshore & Marine Product Line Manager for Severn Trent De Nora. “The system’s performance is a testament to the overall design and quality of the equipment.”


Effective solids management is imperative to marine sanitation treatment systems since it directly affects operator exposure to biological hazards. The operational benefit of incorporating the centrifuge technology into the OMNIPURE unit is effective processing of solids that are removed by the system with minimal operator exposure and intervention. The solids are handled automatically, minimising the arduous maintenance duties required with other methods of solids handling. The system is also corrosion resistant. The OMNIPURE process does not require handling of waste solids from raw, untreated influent. Instead, concentrated solids are automatically removed in situ to the treatment process, producing dry, dewatered solids that can be easily handled and disposed of.


Casbeer noted: “With the AST technology, our system can now successfully extract both large and sub-micron particulate fines from the solids stream and in the process, produce a consistently dry discharge cake with no visible liquid present.” In fact, solids are characterised as a ‘Class B’ sludge, so the dewatered solids can be land-filled or disposed of by traditional waste management methods without fear of environmental impact, penalties or a risk to life and health.


The OMNIPURE Series 55 systems can accommodate treatment capacities up to 598 persons for black water and up to 197 persons for black and gray water. The systems range in capacity up to 65 m3/day (17,000 gal/day) as individual units that can also be combined for increased capacity.


Circle no. 380


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48