Generally it has been observed that sensor is acting as a convertor which measures a physical quantity and transfers it into a signal that can be read by an electronic device. Almost all branch of Textile industry is well equipped with sensors in the present modern era. The application of sensor upgraded and enhanced productivity and efficiency of the machine with maintaining adequate quality and minimizing wastage in the subsequent process. Although sensor playing a very important role in controlling the accident during working on the subsequent processes. In this review article we show various sensors and its actual working in polyester and nylon manufacturing melt spinning process. This all sensors played an important role for optimizing process parameters for better productivity.