Hopper dosers represent a critical class of bulk material handling equipment widely employed across pharmaceutical, food processing, chemical, and construction industries. Despite their industrial prevalence, a consolidated technical review encompassing their structural design, operational principles, control technologies, and comparative performance has not been published in recent literature.

hopper doser, bulk material handling, loss-in-weight feeder, gravimetric dosing, volumetric dosing, screw feeder, belt feeder, industrial automation.

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Grand View Research. Dosing and Mixing Equipment Market Size, Share & Trends Analysis Report by Product, by End-Use, by Region, and Segment Forecasts, 2023–2030. San Francisco: Grand View Research; 2023.

Schulze D. Powders and Bulk Solids: Behavior, Characterization, Storage and Flow. 2nd ed. Berlin: Springer; 2021. doi:10.1007/978-3-642-00490-2.

ISO 7971-2:2019. Cereals and Cereal Products – Determination of Bulk Density – Part 2: Method Using a 20-Litre Measure. Geneva: International Organization for Standardization; 2019.

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Besenhard MO, Khinast JG, Jokhakar SB. Improving loss-in-weight feeder accuracy using model predictive control. Powder Technol. 2021;380:78–89. doi:10.1016/j.powtec.2020.11.032.

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