What is a dosing pump? K-TECH Dosing pumps are slim pumps designed to inject liquids or other substances into water, oil or steam. Metering pump suppliers are generally small and can offer reasonable prices, especially for maximum control. They are the main components of chemical dispersions designed for chemical dispersion. These metrological concepts are used in many applications and industries, from wastewater treatment to food processing. How does Metering work? Metering pump suppliers draw a measuring liquid into its chamber and inject it into the tank or pipe containing the measured liquid. It is operated by an electric or pneumatic actuator and has a control unit that turns the pump on and off and controls the flow. Some models involve more complexity.