What is a common feature of modern elevator door systems?

Advanced safety sensors are a vital component of modern elevator door systems, enhancing user safety and operational efficiency. These sensors are designed to detect obstacles in the path of the door, ensuring that the doors do not close on passengers or objects. This technology has evolved to include features such as infrared beams or pressure-sensitive mats, which significantly reduce the risk of accidents.

In contrast, manual operation lacks the automation and safety features of modern systems, making it less efficient and safe. Heavy metal construction, while durable, is not a defining feature of contemporary elevator door systems, which often use lighter materials to improve energy efficiency and design flexibility. Simple mechanical locks do not offer the robustness of modern security measures, which include electronic access control and advanced locking mechanisms. Therefore, the integration of advanced safety sensors into elevator door systems represents a crucial advancement in ensuring passenger safety and enhancing the overall functionality of elevators.