W.L. Walker hand driven petroleum centrifuges provide a portable and dependable method for evaluating sediment and water content in crude oil and petroleum products. Widely used by operators, pumpers, and field personnel, these self-contained centrifuges require no electricity or compressed air, making them ideal for production sites, remote locations, marine applications, and general field use. Hand driven centrifuges are commonly used as a quick screening tool to better understand well performance, production conditions, and sample quality prior to more formal laboratory or custody transfer testing.