Multi-position magnetic stirring hotplate

Quick Answer: Multi-position magnetic stirring hotplate is a heated plate with several magnetic stirring points, so a number of vessels are heated and stirred together on one unit. It saves bench space when several warm solutions or heated experiments run in parallel.

Parallel Heated Work on One Plate

Heated practicals slow down when every group queues for one hotplate. A multi-position magnetic stirring hotplate lets a class compare the solubility of several salts at the same raised temperature, or lets a technician dissolve several different media in one session. Each vessel has its own stir bar, while all of them take their heat from the same plate.

A shared hot plate is rarely perfectly even: positions near the edge lose heat to the air faster than central ones, and vessels holding more liquid warm more slowly. Use equal volumes in matching vessels, and keep a thermometer in at least one vessel per row to see how closely the positions agree.

The number of positions, plate material and temperature range are not given in the title. With stirring turned off, the plate normally works as a plain hotplate as well, for instance to warm several beakers of water, provided each vessel stands on a heated area.

Parallel Heated Tasks

• Comparing the solubility of several salts at one raised temperature
• Dissolving several different culture media or agar mixes in one session
• Warming buffers for a whole practical class before the lesson starts
• Running replicate heated reactions for a class results table

Working Safely Across Several Positions

• Reach over hot vessels as little as possible, and plan the order of work so the nearest vessel is handled first.
• Keep equal gaps between vessels so each bar couples with its own drive.
• Switch off the heater and let the plate cool before removing every vessel and wiping it.
• Keep solvents with low flash points off the heated plate altogether.

Specifications

Why Choose LabEquip

Stirring hotplates with several positions are chosen by departments that run heated practicals for many groups, and by prep rooms that make several media at once. LabEquip lists this unit in General Lab Products with the three-position heating magnetic stirrer for smaller set-ups; send the number of vessels you need to heat through the contact page.

Frequently Asked Questions

Can each position be set to a different temperature?

Not when the positions share one heated plate, as they do on a stirring hotplate of this kind; differences then come only from position and volume. For different temperatures, use separate hotplate stirrers.

Why are the outer vessels cooler?

Edge positions lose more heat to the surrounding air than central ones. Rotate vessels between positions in long runs, or check each with a thermometer and adjust volumes.

Can I heat without stirring?

Yes, turning the stirring off leaves the plate working as a hotplate. Stirring is still advised for liquids, since unstirred vessels develop hot spots and can bump.

How far apart should vessels be?

Centre each vessel on its marked position and leave a gap between neighbours. Touching vessels pass heat to each other, and their stir bars may pull towards each other.

Is it suitable for heating agar in several bottles?

Yes, with caps loosened and bottles no more than half full, stirring until each one clears. Watch closely near boiling and let the bottles cool slightly before moving them.

What should never go on the heated plate?

Flammable solvents such as ethanol or acetone in open vessels, bottles with tightly closed caps, plastic containers and cracked glassware. Use a water bath method in a fume cupboard for flammable liquids.

Last Updated: September 2026