Overhead stirrers are robust laboratory devices designed for mixing and agitating viscous liquids and large volumes of samples. Unlike magnetic stirrers, which use a stir bar, overhead stirrers utilise a motorised shaft with an impeller or stirrer attachment to provide powerful stirring action. They are ideal for applications in chemistry, biochemistry, and materials science, where thorough mixing is essential for achieving homogeneity in suspensions, emulsions, and reactions. Overhead stirrers often feature adjustable speed settings and torque control, allowing researchers to customise the stirring conditions based on the viscosity and characteristics of the sample. Many models also offer safety features, such as automatic shut-off and robust construction to withstand demanding laboratory environments. By providing effective agitation for larger volumes, overhead stirrers are indispensable tools for ensuring consistent and reliable experimental outcomes.