A micro dosing system accurately meters very small quantities of high-value or potent ingredients — such as vitamins, trace minerals, enzymes, amino acids or medications — into a feed formulation, typically at addition rates measured in grams per tonne rather than the kilogram-per-tonne rates handled by macro ingredient batching systems. Because these ingredients are added in such small quantities relative to total batch weight, precision and repeatability are critical to ensure correct nutrient or drug levels in the finished feed.

Micro dosing systems generally use specialized weighing or volumetric dosing equipment with much finer resolution than standard macro batching scales, often incorporating loss-in-weight or gain-in-weight measurement principles to achieve the required accuracy at low dose rates.

Loss-in-weight systems work by continuously weighing a small hopper or container of the micro-ingredient as it is dispensed, calculating delivered quantity from the measured weight reduction over time — a method well suited to free-flowing powders dispensed at a steady rate. Gain-in-weight systems instead weigh the receiving vessel as material is added, which can offer advantages for batch-style dosing where a precise total quantity, rather than a continuous rate, is the primary requirement.

These systems are particularly important in medicated feed production, where dosing accuracy directly affects both efficacy and regulatory compliance, and in premix and concentrate manufacturing, where small errors in micro-ingredient addition can have a disproportionate impact on the nutritional or therapeutic value of the finished product.

Calibration verification and periodic accuracy testing — typically by collecting and weighing a timed sample of dispensed material and comparing it against the expected quantity — are standard quality assurance procedures for micro dosing systems, often performed more frequently than for macro batching equipment given the tighter tolerance typically required for these critical, low-inclusion ingredients.

Many micro dosing installations also incorporate sequential or multi-ingredient dosing capability, allowing several different micro-ingredients to be added through a shared dosing head or delivery system at different points in a batch cycle, with the control system tracking which ingredient is currently being dispensed and confirming the correct quantity for each before moving to the next.