doserer

A doserer is a device or instrument used to dispense precise amounts of liquids, powders, or pastes. It is designed to deliver defined quantities with repeatable accuracy, enabling consistent dosing in manufacturing, research, and healthcare settings. Doserers may be manual, requiring operator actuations, or automated, integrated into process lines or laboratory benches.

Common designs include volumetric dosing pumps, piston or syringe-based dosers, gravimetric feeders, and peristaltic pumps. Volumetric dosers dispense a fixed volume per actuation; gravimetric dosers rely on knowing the mass dispensed. Many models include feedback sensors, such as flow meters, weight sensors, or optical detectors, to ensure the delivered dose matches the target and to enable closed-loop control. Controls may range from simple mechanical dials to programmable logic controllers or microcontrollers.

Applications: In pharmaceutical and biotech production, precise dosing of solvents, reagents, and active pharmaceutical ingredients is essential. In laboratories, dosers automate reagent addition for experiments. In the food and beverage industry, dosers add flavors, colorants, or additives. In agriculture, they apply fertilizers or plant protection products. In water treatment, precise chemical dosing maintains pH and disinfection levels.

Quality and safety: Proper calibration, cleaning, and maintenance are critical to prevent cross-contamination, dispense errors, and safety hazards. Many jurisdictions require traceable calibration records and conformity with good manufacturing practices (GMP) or good laboratory practices (GLP).