A safety scanner is a sensing device used to protect people and equipment by detecting the presence or movement of objects within a defined area. It uses laser technology to continuously scan its surroundings and create a safety zone. When a person or object enters this protected zone, the scanner immediately sends a signal to stop or slow down the machine, ensuring safe operation in industrial environments.
The working principle of a safety scanner is based on time-of-flight laser measurement. The scanner emits laser pulses that reflect off objects in its range. By measuring how long it takes for the light to return, the scanner calculates the distance and determines if something is present in the monitored area. The device can be programmed with two or more zones — a warning zone and a safety zone. When an object enters the warning zone, the scanner can trigger an alert or reduce machine speed. If it enters the safety zone, the scanner immediately sends a stop signal to the control system to prevent injury or damage.
Safety scanners are widely used in automated guided vehicles (AGVs), robotic work cells, and production lines where people and machines work close together. For example, in a packaging or assembly line, the safety scanner monitors the area around a robot or moving conveyor. If an operator accidentally steps into the restricted area, the machine stops instantly, preventing accidents.
Unlike fixed safety devices such as light curtains or safety mats, safety laser scanners offer flexible protection because their zones can be adjusted through software. This allows them to cover complex or curved areas that are difficult to guard with traditional barriers.
Brands like Omron manufacture advanced safety scanners that combine precision detection with easy configuration and compact design. These scanners support multiple safety zones, reliable response times, and network connectivity for integration with modern automation systems.
A safety scanner plays a vital role in modern industrial safety by combining smart laser sensing with high-speed control, allowing machines to operate efficiently while maintaining complete protection for workers in dynamic and high-risk environments.