Air Jet Sieving is a method used to separate particles based on their size. It utilizes a stream of air to pass through a sieve, allowing smaller particles to pass through while larger ones remain on top. This technique is commonly used in laboratories and industries to analyze the particle size distribution of powders and granules. The process is efficient and quick, providing accurate results for various materials, including pharmaceuticals, food products, and chemicals. By measuring the amount of material retained on the sieve, users can determine the size distribution, which is crucial for quality control and product formulation.