Neuation is the benchtop equipment brand of Accumax Lab Devices Pvt Ltd. The Neuation iStir range covers magnetic stirring from single 400 ml vessels to 10 litre volumes, with speed ranges from 15 to 2200 RPM across four models.
Magnetic stirring uses a rotating magnetic field beneath the vessel to drive a PTFE-coated stir bar inside it. Because nothing mechanical enters the sample, the method introduces no contamination and no risk of shear damage from a shaft or impeller — which is why it remains the default mixing method for buffers, reagents, media and dissolution work.
Four parameters determine fit:
Volume. Match the stated stirring capacity to your largest routine vessel, not your smallest. A stirrer rated to 800 ml will not maintain a vortex in a 2 litre flask.
Speed range. Low-end speed matters as much as maximum. Gentle mixing of cell suspensions or viscous media needs controllable low RPM; the iStir Quattro adjusts from 15 RPM upward in 50 RPM steps.
Number of vessels. Where several solutions are prepared in parallel, a multi-position stirrer occupies a fraction of the bench space of separate units. The iStir Quattro drives four 400 ml vessels from a 13.4 mm profile.
Duty and environment. For continuous operation, a motorless design removes the primary wear component. The iStir Quattro has no moving parts and is IP 65 rated against liquid spills, which is relevant on a wet bench.
Pharmaceutical — buffer preparation, formulation mixing, dissolution testing and stability studies where uniform agitation is a validated parameter.
Chemical — reaction mixing, reagent blending and catalyst dispersion, including extended reactions requiring stable continuous stirring.
Biotechnology — media and reagent preparation, where non-contact mixing avoids introducing contamination into sterile preparations.
Environmental and food testing — homogenising samples before aliquoting for analysis, so that subsamples are representative.
Quality control — reproducible mixing conditions across operators and across shifts, so that variation in results is attributable to the sample rather than the preparation.
Academic and research — general solution preparation, method development and teaching laboratories.
For simultaneous heating and stirring, see magnetic stirrers with hot plate. For volumes above 10 litres, see large capacity stirrers. For high-viscosity applications requiring direct mechanical agitation, see overhead stirrers.
A magnetic stirrer mixes liquids using a rotating magnetic field that drives a coated stir bar inside the vessel. It is used for buffer and reagent preparation, dissolution testing, reaction mixing, media preparation and sample homogenisation in pharmaceutical, chemical, biotechnology, environmental and quality control laboratories. Because no component enters the sample, the method introduces no contamination.
A motor or an electromagnetic drive beneath the plate rotates a magnetic field. This field couples to a PTFE-coated magnetic stir bar placed in the vessel, causing it to spin and create a vortex. Motorless designs such as the iStir Quattro generate the rotating field electronically, so the instrument has no moving parts and no mechanical wear.
Speed depends on volume and viscosity. Low speeds suit gentle mixing of cell suspensions and viscous solutions; higher speeds suit rapid dissolution of solids in low-viscosity liquids. The Neuation iStir range covers 15 to 2200 RPM depending on model, with the iStir Quattro adjustable in 50 RPM increments from 15 RPM.
Magnetic stirrers handle moderately viscous liquids provided the magnetic coupling is strong enough to prevent the stir bar decoupling from the drive field. Above a certain viscosity, the coupling fails, and the bar stops tracking; for these applications, an overhead stirrer, which applies torque mechanically, is the correct instrument.
Stir bar length should be matched to vessel diameter — as a general rule, roughly two-thirds of the base diameter. The iStir Quattro is supplied with four 8 × 25 mm high-strength stir bars and recommends a 25 mm bar length.
A magnetic stirrer provides agitation only. A magnetic stirrer with hot plate adds a heated surface with independent temperature control, allowing a solution to be heated and mixed simultaneously. Choose the hot plate version where the protocol requires controlled heating; otherwise, a standard magnetic stirrer is sufficient and occupies less bench space.
No component of the instrument enters the sample. The only item in contact with the liquid is the stir bar, which is PTFE-coated and chemically inert. This makes magnetic stirring suitable for sterile preparations and trace analysis work.
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