Microwave Motion Sensor mainly used for security purpose. It sense an intruder and send an alert to the monitoring center. It works on microwave pulses and measure the reflection off moving objects and also cover large area than infrared sensors. This sensor is best for security because it's radiation easily penetrate through wall and holes. Application of Microwave Motion Sensor are following; Detect heartbeat of human being Elevator shaftway traffic law enforcement monitoring the light system of a house or a building