Fluid level monitoring system for dishwashing machines

A fluid detection system for a dishwashing machine, the fluid detection system comprising:

• a tank adapted to hold a fluid during a cleaning cycle, the tank including a first vertical wall and a second vertical wall, wherein the tank is adapted to function as an electrical ground;
• a probe including:
• a mounting flange adapted to be secured to the first vertical wall or the second vertical wall of the tank of the dishwashing machine;
• a first conductor extending outwardly from the mounting flange into the tank, the first conductor including a first insulating jacket and a first electrode, wherein the first electrode is positioned to contact the fluid within the tank when the fluid is at a first fluid level;
• a second conductor extending outwardly from the mounting flange into the tank, the second conductor including a second insulating jacket and a second electrode, wherein the second electrode is positioned to contact the fluid within the tank when the fluid is at a second fluid level;
• and
• a control circuit adapted to provide alternating current to the first electrode and the second electrode, and, based on a signal from the first electrode or the second electrode, cause fluid to be pumped into the tank or to be drained from the tank during a cleaning cycle.

A method of replacing a level switch of a dishwashing machine, the method comprising:

• electrically disconnecting the level switch of the dishwashing machine;
• removing the level switch from a tank of the dishwashing machine, wherein removing the level switch includes removing one or more fasteners;
• securing a probe to the tank of the dishwashing machine, wherein securing the probe to the tank includes reinstalling the one or more fasteners;
• and
• electrically coupling the probe to the dishwashing machine.