Debris basket indicator system

A method of detecting a fill level in a debris basket of a cleaning machine, the method comprising:

• initiating a wet cleaning mode of the cleaning machine, the cleaning machine comprising:
• a liquid cleaning system to dispense a liquid cleaning solution from a liquid storage tank onto a cleaning surface;
• a cleaning element engageable with the cleaning surface, the cleaning element configured to provide a cleaning action using the liquid cleaning solution to remove debris from the cleaning surface when engaged;
• a squeegee disposed to collect the liquid cleaning solution and debris removed from the cleaning surface by the cleaning element;
• a recovery tank assembly comprising:
• a recovery tank defining a cavity therein, wherein the recovery tank is disposed to retain the liquid cleaning solution;
• a squeegee hose connected to and in fluid communication with the recovery tank from the squeegee, wherein the squeegee hose is disposed to deliver the liquid cleaning solution collected by the squeegee to the recovery tank;
• a debris basket disposed within the recovery tank and in fluid communication with the squeegee hose to retain debris from the used liquid cleaning solution;
• and
• a vacuum system to draw the liquid cleaning solution and debris through the squeegee hose and into the recovery tank, the vacuum system including a vacuum compartment, wherein the vacuum compartment is disposed adjacent the recovery tank;
• and
• a debris monitoring system comprising a pressure sensor, wherein the pressure sensor is disposed within the vacuum compartment, and wherein the pressure sensor is operatively connected to the recovery tank;
• measuring a pressure differential between the vacuum compartment and the recovery tank with the pressure sensor;
• and
• determining the fill level of the debris basket in response to the pressure differential.