Magnetic stirrers

If you only need to mix or dissolve at room temperature, a stirrer without heating is simpler, cooler on the bench and safer near flammable solvents. The digital magnetic stirrer without heating, 3 l is an example. If you need to dissolve, react or keep a solution warm while stirring, choose a heated model. Maximum plate temperatures differ a lot: the three-position stirrer with hotplate reaches 325 °C, while the 10-position heated stirrer goes up to 120 °C. For heating without stirring, see hotplates and heating blocks.

The product sheet gives the maximum stirring volume, always measured with water. Compact stirrers handle a few litres, for example the single-position magnetic stirrer for up to 4000 ml. For large vessels there are heavy-duty units, such as the single-position stirrer for 1 to 150 litres, with a strong magnetic coupling that also drives through thick vessel bottoms. With viscous liquids, suspensions or tall narrow vessels, the real capacity is lower than the water figure, so leave a margin. Tell us your vessel and liquid: sales@luminixhealth.com.

A single-position stirrer is the standard for one vessel at a time. If you prepare parallel samples, such as a series of solutions, dissolution tests or reactions under the same conditions, a multi-position stirrer saves bench space and keeps conditions equal. The stirrer with hotplate and three independent stirring points heats and stirs three vessels at once. For larger series, the heated stirrer with 10 positions takes vessels of up to 400 ml each. Check the maximum volume per position, which is lower than for a single-position unit.

A practical rule is a stir bar of about one third to half the diameter of the vessel bottom. Too short and the liquid barely moves; too long and the bar hits the wall or decouples. Check what the stirrer is designed for: the stirrer without heating is meant for stir bars of 30 to 50 mm, and the 10-position heated stirrer recommends 25 mm. Use oval bars in round-bottom flasks and cylindrical ones in beakers. You will find all shapes and sizes in magnetic stirring bars.

A magnetic stirrer is the motor and the plate under the flask. Many also heat. The stirring capacity is the litres of a water-like liquid it can turn, and a viscous liquid defeats a rating that was measured on water.

Stirring keeps a mixture uniform or helps a solid dissolve. A magnetic stirrer spins a bar inside a closed vessel. An overhead stirrer drives a shaft when the liquid is viscous or the volume is large. A vortex mixer agitates a tube. A shaker moves a whole rack or a plate. The shape of the impeller and the speed decide whether the liquid turns over or merely spins. The vessels being stirred are indexed under ISO laboratory glassware.

This shelf belongs to Stirring, shaking & mixing, inside Lab instruments. Luminix Health distributes this range for laboratory use.

The neighbouring shelves are Magnetic stirring bars, Stirring shafts, propellers & impellers, Stirring & mixing accessories, Homogenisers & dispersers, Shakers, rockers & rotators, Overhead stirrers and Vortex mixers. The category above this shelf is Stirring, shaking & mixing.

Luminix Health distributes this range from the heart of Europe. We deliver across the EU in two to five days if in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. Send a quote request, contact the team, or read who we are. The full brand index is on shop by brand.

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