A laboratory sieve is a device used to separate and classify particles of different sizes in a sample. It consists of a mesh screen or perforated plate that allows smaller particles to pass through while retaining larger ones. This tool is commonly used in various fields, including pharmaceuticals, food science, and materials testing. Laboratory sieves come in various sizes and mesh openings, allowing for precise control over particle size distribution. They are often used in conjunction with a sieve shaker, which automates the sieving process, ensuring consistent and efficient results. Proper use of laboratory sieves is essential for accurate analysis and quality control.