Serel designs, manufactures and markets electronic X-ray systems for the control, regulation and production management of the textile industry. The Serel Lap Density Control (SLDC), which was previously better known as “Servolap”/"Servo-X", uses a density measurement for the regulation of textile web production. Meanwhile, the Serel Traveling Regularity Control (STRC) provides quality control of the web finished textile on a continuous basis. The combination of these 2 devices ensures maximum precision in fiber feeding by closed loop operation.