Automatically sensing consumable components in thermal processing systems

A plasma arc torch for use in a plasma cutting system, the plasma arc torch comprising:

• a torch body for conducting electrical current, the torch body including a torch tip configured to pass the electrical current to at least one consumable component connected to the tip;
• an antenna positioned relative to the torch tip, the antenna configured to broadcast a radio frequency (RF) signal and scan an area proximate the torch tip for a return signal in response to the broadcasted RF signal;
• a reader connected to the antenna, the reader comprises (i) a drive circuit configured to drive the antenna, (ii) an RF generator configured to generate the RF signal and supply the RF signal to the drive circuit, and (iii) a microcontroller configured to detect a presence of the at least one consumable component based on the return signal.