Daylight harvesting and motion sensing form a highly efficient dual-technology approach to lighting automation. While motion sensors detect human presence to switch lights ON/OFF, daylight harvesting measures ambient brightness to determine whether artificial light is necessary. Combining both ensures lighting is available only when required—leading to significant energy savings.

TRUEiSENSE’s sensors include lux-based ambient light detection, enabling them to react to surrounding light levels. When natural daylight is sufficient, the sensor prevents the lights from turning ON, even if motion is detected. This is essential in spaces with windows, skylights, or glass facades.

How the System Works Technically

Presence Detection:

The microwave sensor monitors movement using Doppler radar waves. When a person enters the detection zone (up to 10 m), it triggers the lighting system.

Ambient Light Evaluation:

The built-in 2–50 LUX threshold ensures artificial lights activate only if daylight falls below the set limit.

Dual-Logic Activation:

Daylight HIGH + Motion YES → Lights remain OFF

Daylight LOW + Motion YES → Lights turn ON

Daylight HIGH + Motion NO → Lights remain OFF

Daylight LOW + Motion NO → Lights turn OFF after delay

Delay Time Management:

With a programmable 5-second to 30-minute hold time, lights do not turn off abruptly once motion stops. This reduces flicker and enhances comfort.

Technical Advantages

High Accuracy Sensing: Microwave sensing ensures detection through light obstacles, improving reliability.

Energy Optimization: Artificial lighting stays OFF whenever natural sunlight meets illumination needs.

Adaptive Dimming (when paired with dimming drivers): Light output automatically reduces as daylight increases.

Stable Performance: Works efficiently across a temperature range of –10°C to +68°C.

Benefits of Integrating Both Technologies

Up to 60–80% energy savings in offices, warehouses, and retail spaces.

Reduces carbon footprint and operational costs.

Improves visual comfort by balancing natural and artificial light.

Extends fixture life by reducing unnecessary runtime.

Together, daylight harvesting and motion sensors create a responsive, eco-friendly lighting system that intelligently adapts to human activity and natural light availability.

Visit: https://trueisense.in/collections/smart-motion-sensors-1

How Daylight Harvesting and Motion Sensors Work Together

Developer of advanced presence detection and smart sensor lighting solutions driving energy efficiency, sustainability, and intelligent automation in modern infrastructure.

How Daylight Harvesting and Motion Sensors Work Together

Trueisense