A batch mixer is an industrial device used to homogenize specific quantities of fluids or solids in discrete cycles. It mixes materials in a controlled, repeatable batch process, making it ideal for applications in oilfield services, chemical processing, and construction where precision in blending is essential.

It typically features agitators or paddles within a fixed-volume tank and is commonly used to prepare drilling fluids, cement slurries, or chemical additives before pumping them into the process system.