An ablation device includes a handle assembly including a distal end, an ablation probe extending distally from the distal end of the handle assembly, and a user interface disposed at the handle assembly. The ablation probe is operably coupled to the user interface. The user interface includes a controller unit, a power on/off switch operably coupled to the controller unit, and at least one detector capable of generating an electrical signal. The controller is in communication with the at least one detector and configured to override operation of the power on/off switch in response to the electrical signal generated by the at least one detector.
