LED motion sensors use light-emitting diodes to provide illumination when motion occurs or to show sensor status, helping people see activity or confirm detection locally. Motion sensors connected to cameras, alarm panels, or access control systems send a detection signal to trigger recording, notifications, alarms, lighting, or door operation, and some also include LEDs as an added indicator or light source.

Mount LED motion sensors where they have a clear view of the detection area, using wall or corner mounting at the manufacturer’s recommended height, such as seven to nine feet for some passive infrared sensors. For outdoor installations, account for weather exposure, obstructions, and the sensor’s adjustable detection range, and keep status LEDs or motion-activated lighting visible from the intended viewing area.

LED motion sensors can support indoor and outdoor installations when the specific device is rated for the environment, such as an outdoor sensor with weather-resistant construction or an indoor PIR sensor for residential and light commercial spaces. Check the product’s installation rating, detection range, mounting requirements, and lighting or alert features before selecting a sensor for the project.

LED motion sensors with passive infrared (PIR) detection can help reduce false activations through selectable pet immunity, sealed optics that limit the effect of drafts and insects, and uniform sensitivity across the detection area. A visible detection LED, along with walk-test functions on some wireless models, helps installers verify sensor placement and operation during setup.