The Conductivity Level Switch is a level limit switch made of three probe rods of different lengths. When two of the probe rods come in contact with the conductive liquid, a measurable current flows between the two rods which allows the student to detect that a certain level has been reached. The three-rod configuration allows the detection and the monitoring of a low and a high level of liquid in the column of the Pressure, Flow, Level, and Temperature Process Training Systems. It comprises a total of two output relays.