Active Infra-red Sensors

Active Infra-red Sensors

Active infra-red sensors are electronic devices that detect and measure the heat radiated by objects in the form of infra-red radiation. They operate by emitting a beam of infra-red radiation and detecting the amount of radiation that is reflected back to the sensor. These sensors are commonly used in a variety of applications, including security systems, motion detectors, and temperature sensors. Active infra-red sensors are typically composed of a transmitter and a receiver. The transmitter emits a beam of infra-red radiation, which is then reflected off of objects in the sensor's field of view. The receiver detects the reflected radiation and converts it into an electrical signal, which is then processed by the sensor's electronics. One of the key advantages of active infra-red sensors is their ability to operate in complete darkness. Since they emit their own radiation, they do not rely on external light sources to detect objects. They are also able to detect objects at longer distances than passive infra-red sensors, which rely on the heat emitted by objects. Active infra-red sensors are used in a wide range of applications, including security systems, motion detectors, and temperature sensors. They are commonly used in outdoor security systems to detect intruders, and in industrial applications to detect the presence of hot objects such as machinery or equipment. Overall, active infra-red sensors are a versatile and reliable technology that is widely used in a variety of applications. Their ability to operate in complete darkness and detect objects at longer distances makes them a valuable tool in many different industries.

electronic devices, infra-red radiation, security systems, motion detectors, temperature sensors

— Ryan Johnson

CITATION : "Ryan Johnson. 'Active Infra-red Sensors.' Design+Encyclopedia. https://design-encyclopedia.com/?E=282902 (Accessed on July 22, 2026)"