Presence detectors also detect larger movements, but their presence range at even the smallest movements such as typing on a PC keyboard. Unlike motion detectors, presence detectors can therefore detect the permanent presence of people – for example at a desk working in the office. If movement is detected and brightness is insufficient, presence detectors activate the lighting.
Unlike motion detectors, however, they do not only measure light just once but repeat the measurement as long as they detect presence. If the required luminance is already achieved by daylight or ambient light, presence detectors switch off the artificial light in an energy-saving manner even if there is a human presence.
Alternatively, they deactivate the lighting at the end of the switch-off delay time. Presence detectors with constant-light control provide even greater convenience and energy efficiency when people are present. Because based on their continuous light measurement, they can continuously adjust the luminance of the artificial light to the natural lighting conditions by dimming.
Presence detectors are ideally suited for indoor areas where people are permanently present, especially in areas with daylight, due to their more precise motion detection and continuous light measurement. They are therefore preferred for use in offices, classrooms or recreation rooms, for example.
Hope above guide is useful for you to select the right sensors and right motion sensor led lighting from Liliway.