A system that does conversion from regular hot plasma produced by ESU to cold plasma which is thermally harmless for the tissue. The system is comprised of Conversion Unit and Cold Plasma Probe. Output signal for ESU connects to CU along with Helium flow. The CU converts signal from ESU and send it to the output connector along with helium flow. Cold Plasma Probe is connected directly to the CU output. At the end of the CPP probe cold plasma is produced.