Methods and apparatus for controlled RF treatments and RF generator system

A method of treatment, comprising:

• causing an energizable electrode of the electrosurgical handpiece to emit a radio-frequency (RF) signal for a selected duration, the electrosurgical handpiece comprising
• a housing for a temperature sensor, wherein the housing defines a first patient-contact surface, an inner surface positioned opposite the first patient-contact surface, and an outer wall extending transversely relative to the first patient-contact surface;
• a temperature sensor thermally coupled with the inner surface of the housing;
• an energizable electrode defining a second patient-contact surface extending outward of the outer wall of the housing;
• an insulator positioned between the energizable electrode and the housing for the temperature sensor to inhibit thermal conduction between the energizable electrode and the housing for the temperature sensor;
• receiving from the temperature sensor of the electrosurgical handpiece while in a non-invasive use a temperature of a skin treatment surface in contact with the electrosurgical handpiece;
• comparing the received temperature to a threshold temperature;
• terminating the RF signal when the received temperature is equal to or higher than the threshold temperature;
• re-engaging or continuing the RF signal emission when the received temperature is lower than the threshold temperature;
• and further comprising:
• receiving a user selection of a value for one or more of a first frequency, a first amplitude, a first pulse-width, a second frequency, a second amplitude, and a second pulse-width;
• and
• causing the electrosurgical handpiece to emit a RF signal comprising a waveform blended from a first current waveform having the first frequency, the first amplitude, and the first pulse-width and a second current waveform having the second frequency, the second amplitude, and the second pulse-width;
• and
• wherein the waveform is non-ablative to tissue and applied by the energizable electrode on a dermal tissue layer of skin on an external side of a patient's body.