Can Passive Infrared Sensors (PIRs) control peripheral devices like CCTV cameras?

Passive Infrared Sensors (PIRs) are designed to detect infrared radiation emitted by objects, particularly human movement. They are widely used in security systems and automation due to their ability to monitor changes in temperature from moving individuals. When a PIR sensor detects motion, it can trigger an action, such as activating other devices.

In the context of controlling peripheral devices like CCTV cameras, PIRs can indeed serve this role effectively. For instance, when the sensor detects motion within its coverage area, it can send a signal to the CCTV system to begin recording or to pan and tilt towards the area of interest. This integration helps enhance security by ensuring that cameras are active only when necessary, optimizing storage and monitoring capabilities.

Regarding the other options, while combining PIRs with other sensors can enhance functionality, it is not a requirement for controlling peripheral devices. Additionally, the ability of PIRs to control devices is not limited to residential applications. They can be implemented effectively in various environments, including commercial and industrial settings, making them versatile tools in security systems. Thus, they can control devices across multiple contexts, further supporting the correct answer.