本文讨论了在转印机应用中使用光电、感应接近开关和光纤等非接触式传感器的目的和优点。介绍了每种传感器（光电、电感和光纤）的工作原理，以说明每种技术的优缺点。通过了解每个传感器的优点和缺点，可以选择适合特定应用的最佳传感器。论文还对许多创新和有趣的技术进行了评论，这些技术可用于提高生产率、提高质量和保护印刷机操作员的福利。

THIS PAPER DISCUSSES THE OBJECTIVES AND BENEFITS OF USING NONCONTACT SENSORS, SUCH AS PHOTOELECTRICS, INDUCTIVE PROXIMITY SWITCHES AND FIBEROPTICS, IN TRANSFER PRESS APPLICATIONS. THE OPERATING PRINCIPAL OF EACH SENSOR (PHOTOELECTRIC, INDUCTIVE, AND FIBEROPTICS) IS PRESENTED TO SHOW THE ADVANTAGE AND DISADVANTAGE OF EACH OF THESE TECHNOLOGIES. BY UNDERSTANDING THE ADVANTAGES AND DISADVANTAGES OF EACH SENSOR, A SELECTION CAN BE MADE REGARDING THE BEST SENSOR FOR THE SPECIFIC APPLICATION. THE PAPER ALSO COMMENTS ON MANY INNOVATIVE AND INTERESTING TECHNOLOGIES THAT ARE AVAILABLE TO INCREASE PRODUCTION RATES, IMPROVE QUALITY, AND PROTECT THE WELL-BEING OF THE PRESS OPERATOR.