Active samplers are devices used to collect air, water, or soil samples by actively drawing in the medium for analysis. Unlike passive samplers, which rely on natural processes to gather samples, active samplers use pumps or fans to ensure a consistent flow of the target medium. This method allows for more precise measurements and quicker results. These samplers are commonly used in environmental monitoring, research, and industrial applications. They help scientists and engineers assess pollution levels, track changes in ecosystems, and ensure compliance with regulations. Examples of active samplers include air quality monitors and water sampling pumps.