A datalogger or data logger is an electronic device for recording data over time. Dataloggers are therefore used to observe waveforms that are digitally processed and recorded.

The oscilloscope is one of the most important and most used measuring instruments. Its essence is that it displays the waveform of the measured voltage signal over time.

A changing climate, with ever-increasing extreme temperatures, and a high degree of urbanisation have driven the demand for air conditioning units, particularly in recent years, even in regions where the need was virtually non-existent in previous decades.