Started in 1939, Gilson developed our Testing Screen in response to Mining and Highway Construction industry. The Testing Screen is still a center piece in most modern aggregate labs. As the industry has grown, so has Gilson. Our reputation for superior knowledge, innovation, and growth of particle size analysis and sample dividing equipment also grew. While we constantly develop and seek out new products, our philosophy remains the same; we offer high-quality products at competitive prices, and back up our great customer service with dedicated technical support. Our goal is to exceed your expectations!