What operation principle does a gravimetric feeder use?

A gravimetric feeder functions based on the principle of measuring and delivering material by weight. This approach ensures accurate control over the amount of material being fed into a process, which is crucial for maintaining the desired quality and consistency of the product. The feeder continuously weighs the material and adjusts the feed rate as necessary to match the target weight, thereby allowing for precise dosing and reducing variability that can occur with volumetric measurement methods.

In contrast, volumetric feeders measure material based on volume, which can lead to inaccuracies due to variations in material density or moisture content. Time-based feeding methods distract from real-time measurement, focusing on delivering material over a specific time interval, which may not consider changes in material flow characteristics. Similarly, pressure-based feeding systems rely on the pressure exerted by the material to control flow, which also does not guarantee the consistent weight delivery needed for critical processes. Thus, the gravimetric feeder's weight-based operation is preferred for applications requiring high precision and reliability.