What does a data logger typically monitor?

A data logger is a versatile device designed to monitor and record various parameters over time. This functionality allows it to collect data related to different environmental conditions or process variables, depending on its sensors and applications.

The correct answer emphasizes the capability of data loggers to track multiple data points, which can include temperature, pressure, humidity, flow rates, and more, all recorded at specified intervals. This comprehensive data collection is essential in many fields such as environmental monitoring, HVAC systems, and industrial processes, where a holistic view of different parameters can provide valuable insights and facilitate better decision-making.

The other options focus on monitoring single parameters, which significantly limits the functionality of a data logger. While a data logger can indeed monitor temperature, pressure, or flow rates individually, its primary strength lies in its ability to simultaneously capture a wide range of measurements, thus enabling more complex analysis and ensuring better control of processes.