Standard load cells enable mechanical dosing with an accuracy ranging from 0.2 to 1%. This means that you can accurately dose 10 kg down to 20–100 g or 1,000 kg down to 2–10 kg. However, for mixing small product volumes, these weight deviations are too large. Therefore, the Micro Dosing System (photo) has been developed for such precision applications. It can dose smaller volumes with precision down to 1 g, eliminating the need for premixes. The Micro Dosing System consists of an in-house-developed Feeder Valve, a specially constructed gain-in-weight (GIW) hopper with a digital load cell and an in-house-developed dosing controller. The product is dosed into the GIW hopper using the Feeder Valve. Based on the weight signal, the system continuously calculates the position of the Feeder Valve. The Feeder Valve is adjusted so that the product is dosed more finely, ensuring the batch is weighed accurately down to the gram scale before being discharged. — Dinnissen Process Technology BV, Sevenum, the Netherlands