29 Pumps, Valves & Liquid Handling Figure 3 Ergonomics
Lab professionals often spend several hours pipetting each day. This can cause discomfort and, in more serious cases, even lead to hand or arm injuries. The best advice to avoid these potential risks is to reduce the time spent holding any pipette to the shortest amount of time possible. Alongside this, users should choose micropipettes that are lightweight and well-balanced, with the mass in the centre for better stability.
The pipette should fi t comfortably into the hand, for both left- and right-handed users, with a good grip design, and adjusting the volume should be as comfortable and fast as possible to avoid unnecessary movements. Again, tips are also important, as tip loading and ejection often requires more force than pipetting and presents a potential risk for injuries, especially in high throughput settings. Pipette tips should snap into place with minimal force, provide a secure connection, and eject just as easily.
Conclusion
It is important to look at all aspects of the workfl ow when choosing the right micropipette for your application. By considering the pipette, its features, the type and volume of liquid being pipetted, as well as the tips used, scientists can guarantee accurate, precise and reliable results, while maintaining productivity and minimising the risk of injury.
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New Chemically Resistant Vacuum Pump Introduced
The new VACUU·PURE® 10C from Vacuubrand is a unique chemically resistant, oil-free screw pump for vacuum down to 10-3 mbar. The pump features maintenance-free technology with no wear parts and delivers a pumping speed of 9 m3/h.
VACUU·PURE 10C is the ideal solution for processes in which aggressive gases or vapours are pumped and clean vacuum is also required. This allows the vacuum pump to cover many application areas in the fields of analytics, chemistry, life sciences, pharmaceuticals, for work ranging from bench-scale research & development up to the kilo laboratory. It is ideal for processes such as vacuum drying, Schlenk lines, heat treatment, distillation, degassing, coating, or as fore vacuum for turbomolecular pumps. Uniquely among fine vacuum pumps, VACUU-PURE pumps can also be used continuously at higher pressures, i.e. in the complete working range between atmospheric pressure and the ultimate vacuum of the pump.
VACUU-PURE’s special design features two cantilevered spindles and a magnetic gear which is completely oil-free. The spindles run contact-free, eliminating wear and abrasion. This allows clean processes and pure products without contamination by oil or lubricants in the entire vacuum range down to 10-3 mbar. Due to the contact-free, lubricant-free design, no regular maintenance is required.
To work with aggressive gases or vapours, wetted components of the vacuum pump are all made of chemically resistant plastics. A thick PEEK encapsulation protects the spindles and stator in the pump chamber. The high chemical compatibility allows efficient pumping without interruption - an upstream cold trap is not necessary in most processes. The optimised screw pump also features high condensate tolerance, which means that no gas ballast is required, even with high chemical vapour generation. An integrated regeneration mode allows the vacuum pump to dry quickly after the end of the process.
For non-corrosive media, the VACUU·PURE® 10 product variant is available. It is designed for high-purity processes where dry- and hydrocarbon- free vacuum is a must. With no oil, abrasion, or wear parts, this pump is ideally suited for applications like providing fore vacuum for high or ultra-high vacuum systems.
More information online:
ilmt.co/PL/5gGv 53501pr@reply-direct.com
THE PROBLEM
■ Time consuming process ■ Risk on running dry on LN2 ■ LN2 spillage is a serious safety risk for the operator, the process and the lab environment
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190462
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■ ■ ■
THE TECHNIQUE
Pressure less flowing LN2 (max 300 mBar) LN2 level control on time and temperature System prepared to be connected to PC ■ Many temperature control options
THE SOLUTIONS
■ Automatic LN2 filling systems for FTIR ■ Automatic LN2 filling systems for DSC ■ LN2 Cold Trap filling ■ LN2 heat exchangers PID temperature control
NOW ALSO AVAILABLE FOR AUTOFILLING LIQUID ARGON
Check our website for video’s and more!
www.norhof.com 23-12-2020 09:08
LIQUID NITROGEN AUTO-FILL SYSTEMS
Norhof manufactures LN2 auto � ll systems. When LN2 is required, a small overpressure (100 mBar) is generated by a small heater element in the LN2 inside the Dewar. On a very elegant way liquid � ows out of the system like water from a tap, without spilling, noise and vibrations, ensuring a very e� cient and safe � lling and level control in your LN2 cooling application.
NEW!
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