Microwave Radar Based Human Body Movement Sensor - RCWL 0516 - Motion Sensor - 5-8 Meters
This sensor module is ideal for human motion detection in a close vicinity of 5-8 meters. It is ideal for appliances and lights control in washrooms and other indoor environments. It can detect human movement in 360 degree angle with an effective working distance of 5 to 8 meter which is enough for small rooms. It provides direct output signal at 3.3V logic level which can be utilized to switch on some relay or pass on the signal to microcontroller for further actions.
Highly accurate motion detector, can replace the PIR detectors in a very reliable manner. Grab one for your design!