Condition monitoring is the continuous recording and evaluation of the technical condition of machines or systems. The aim is to detect early signs of wear, imbalance, overheating or other abnormalities before failures occur. Monitoring is typically performed using sensors that record parameters such as vibrations, temperature, pressure, speed, and lubricant quality. This data is then analysed to predict maintenance requirements and avoid unplanned downtime. Condition monitoring is an integral part of modern maintenance strategies in sectors such as mechanical engineering, energy technology, shipping, rail transport, and the process industry.