| Feature | Standard PIR Sensor | Human March/Presence (Radar) | | :--- | :--- | :--- | | | Yes | Yes | | Detects Sitting Still | No (Times out) | Yes (Breathing detection) | | Can "See" Through Objects | No (Needs line of sight) | Yes (Can detect through thin plastic/wood) | | Distance Control | No | Yes (Adjustable gates) | | Interference | Heat changes, sunlight | Metal objects, fans (tunable) |