Tool holder having at least one sensor

A tool holder comprising:

• a receptacle for a tool;
• a data module;
• a power supply, wherein
• the data module comprises at least one sensor configured and/or programmed to capture operating and/or status data, and a transmitter configured and/or programmed to transmit the data to a receiver;
• and
• a switching unit which is capable of electrically connecting or disconnecting the data module to or from the power supply,
• the switching unit is designed in such a manner that the switching unit is actuated without contact,
• the switching unit comprises an electrically actuatable switch, and
• the switching unit is supplied wirelessly with electrical energy by a transmitter located outside of the tool holder.