เซนเซอร์ลำแสงอินฟราเรด

OPTEX photobeam sensor is an opposing-type system in which the transmitter emits an infrared beam and the receiver, positioned opposite, receives it. When a person or object physically interrupts this beam, the system instantly detects the intrusion and triggers an alarm.
These sensors serve as a critical component in security systems, allowing for rapid detection and seamless integration with alarms and surveillance cameras to ensure immediate response.

For an explanation of how photobeam sensors work and how to choose the best model based on your environment and needs, please refer to the article at the link below.