The demonstration background
The laboratory demonstration Remote Water Level Control is the common demonstration of the control of the type On/Off. The water level is detected by a probe, which detects the water level by its electrical conductivity. Water is coloured by ink for better visibility (not for better conductivity). The manual controls enable the control of the supply of water (the On/Off of the pump) and the control of overflow. A Web Camera monitors the whole experiment and the video signal is streamed on-line. The user can control the water level interactively by clicking the controls of the control panel.