Geld Tech Presents our Microwave Ceiling Mount Sensor. Unlike PIR sensors that function by detecting the very small movements generated by people in their sensory area, these Sensors function by using the electromagnetic properties of Microwaves. These ceiling-mounted microwave sensors are very efficient and sensitive to their surrounding and automatically start any electrical appliances (like led light, blub, tube light, panel light or fan) as soon as they detect someone. Highly Sensitive Range Sensor It can detect through doors, glass panels, and thin walls. This sophisticated sensor is designed to detect people in a comprehensive 360-degree range. This sensor is available in slim & compact size, which look very attractive.It automatically distinguishes between day and night, but we can opt only night mode as per requirement.