Microwave sensors should be mounted

Microwave sensors are active volumetric sensors that transmit microwave signals and detect motion based on frequency changes. For optimal coverage and effectiveness, they are typically mounted near the ceiling of the protected area. This elevated placement allows the sensor to cover a wider detection zone and reduces interference from obstacles such as furniture or equipment. In workplace security and Human Resource safety management, proper sensor placement is essential to ensure reliable detection and minimize false alarms. Mounting sensors too low can limit their range and increase the likelihood of obstructions affecting performance. Positioning them at ceiling level enhances monitoring efficiency and supports a safer working environment by ensuring comprehensive coverage. Therefore, option D is correct because it provides the most effective installation position for microwave sensors.