Total body volume meter

The present apparatus shows a device for measuring the total volume displaced by a human body. A tank portion has an enlarged upper opening for an individual to enter the tank therethrough. Thereafter, while the individual is in a sitting position inside of the tank, the enlarged upper opening is closed with the individual's head extending upward into an open ended cylinder. A tall cylinder of equal diameter with the open ended cylinder is connected to a control console which pumps the water level inside of the tank up to a predetermined point inside of the open ended cylinder. Thereafter, if the individual lowers his head below the water level by releasing a seat on which the individual is sitting, an accurate reading of the column of water displaced can be obtained on a manometer and compared with a prior reading before entering the tank. By determining the total volume of the columns of water displaced in the tall cylinder and the open ended cylinder, the total volume of water displaced by the individual can be accurately obtained.