Ultrasonic treatment apparatus

An ultrasonic treatment apparatus, comprising:

• a hand piece of a particular type, including an ultrasonic oscillator;
• a probe detachably attached to said hand piece;
• a connector including a set of first contacts and two second contacts, and a two-terminal identifying element coupled between said two second contacts and having a value of an electrical characteristic unique to said hand piece;
• a driving device including drive means for supplying a selected value of power to said ultrasonic oscillator, means for identifying the particular type of said hand piece based upon the electrical characteristic of said two-terminal identifying element to output an identifying signal corresponding to the particular type of said hand piece, and a socket having a set of first contacts connected to the drive means and two second contacts connected to the identifying means;
• means for setting a selected value of power supplied from the drive means corresponding to the particular type of said hand piece, based on said identifying signal;
• and
• means, responsive to said selected value of power being set by said setting means, for displaying a message that the selected value of power has been set;
• wherein said connector is connected to the socket, so that the hand piece is connected to the drive means and the identifying means, with the first set of contacts of the socket and said first set of contacts of the connector being electrically connected to each other, and said two second contacts of the socket and said two second contacts of the connector being electrically connected to each other.