Abstract
This article presents a comprehensive analysis of technological devices and methods designed for continuous and automatic monitoring of the linear density (ktex) of cotton sliver (roving). More than 20 scientific sources, patents, and industrial catalogs published between 2010 and 2024 were reviewed. Control systems based on capacitive, optical, mechanical, microwave, and ultrasonic principles were compared, and their metrological characteristics, operational stability under industrial conditions, and economic efficiency were evaluated. The prospects of modern “smart” control systems integrated with artificial intelligence were also discussed. The results show that capacitive and combined optical-capacitive systems currently represent the most effective solution in terms of high accuracy (CV% < 0.8) and reliability.