Patent ID: 7943086

Claim:
An apparatus for washing and disinfecting an endoscope comprising: a dilution tank into which first and second chemicals and dilution water are charged in a filling direction, the dilution tank diluting the first and second chemicals to a predetermined concentration to be used for disinfecting the endoscope, and the dilution tank including: a first storage portion; a second storage portion which has an area of base smaller than an area of base of the first storage portion, has a volume smaller than a volume of the first storage portion, and communicates with the first storage portion; a first electrode sensor that is provided adjacent to where the second storage portion communicates with the first storage portion, and detects a state in which the dilution water is charged into the second storage portion up to a first level; a second electrode sensor that is provided at a position higher in the filling direction than the position of the first electrode sensor, and detects a state in which the first chemical is charged into the second storage portion up to a second level; and a third electrode sensor that is provided at a position higher in the filling direction than the position of the second electrode sensor, and detects a state in which the second chemical is charged into the second storage portion up to a third level; and a measurement unit which measures, as a first volume, a volume of the first chemical based on a detection result of the second electrode sensor and measures, as a second volume, a volume of the second chemical based on a detection result of the third electrode sensor and the detection result of the second electrode sensor.