A packaging apparatus comprising: a packaging assembly configured for receiving a product to be packaged and at least one film for packaging the product, a heater (200, 202) associated to the packaging assembly and having a heating surface configured to heat seal one or more parts of said film, the heater (200, 202) comprising at least one electrically conductive element, and a supply unit connected to the electrically conductive element of the heater (200, 202) and configured to supply electric energy to said heater (200, 202) by causing an electric current flow through said electrically conductive element, wherein the electrically conductive element comprises an electrically conductive carbon structure; characterized in that the apparatus further comprises: - at least one electric sensor electrically connected or connectable to the carbon structure and configured for detecting an electric parameter of the carbon structure and emitting a corresponding electric parameter signal, the electric parameter comprising one of an electric impedance of a prefixed segment of said carbon structure, an electric current flowing through said prefixed segment of the carbon structure when a prefixed electric voltage is applied at ends of said prefixed segment, an electric voltage detected at ends of the prefixed segment of the carbon structure when a prefixed electric current is imposed to flow through said prefixed segment, wherein a control device is connected to said electric sensor, and is configured for: - receiving said electric parameter signal and controlling the supply unit to supply electric energy to the electrically conductive element, optionally by regulating voltage applied to the electrically conductive element and/or duration of application of said voltage, based on said electric parameter signal and on a desired value for a temperature of the heating surface of the heater (200, 202). a packaging assembly configured for receiving a product to be packaged and at least one film for packaging the product, a heater (200, 202) associated to the packaging assembly and having a heating surface configured to heat seal one or more parts of said film, the heater (200, 202) comprising at least one electrically conductive element, and a supply unit connected to the electrically conductive element of the heater (200, 202) and configured to supply electric energy to said heater (200, 202) by causing an electric current flow through said electrically conductive element, wherein the electrically conductive element comprises an electrically conductive carbon structure; characterized in that the apparatus further comprises: - at least one electric sensor electrically connected or connectable to the carbon structure and configured for detecting an electric parameter of the carbon structure and emitting a corresponding electric parameter signal, the electric parameter comprising one of an electric impedance of a prefixed segment of said carbon structure, an electric current flowing through said prefixed segment of the carbon structure when a prefixed electric voltage is applied at ends of said prefixed segment, an electric voltage detected at ends of the prefixed segment of the carbon structure when a prefixed electric current is imposed to flow through said prefixed segment, - at least one electric sensor electrically connected or connectable to the carbon structure and configured for detecting an electric parameter of the carbon structure and emitting a corresponding electric parameter signal, the electric parameter comprising one of an electric impedance of a prefixed segment of said carbon structure, an electric current flowing through said prefixed segment of the carbon structure when a prefixed electric voltage is applied at ends of said prefixed segment, an electric voltage detected at ends of the prefixed segment of the carbon structure when a prefixed electric current is imposed to flow through said prefixed segment, an electric impedance of a prefixed segment of said carbon structure, an electric current flowing through said prefixed segment of the carbon structure when a prefixed electric voltage is applied at ends of said prefixed segment, an electric voltage detected at ends of the prefixed segment of the carbon structure when a prefixed electric current is imposed to flow through said prefixed segment, wherein a control device is connected to said electric sensor, and is configured for: - receiving said electric parameter signal and controlling the supply unit to supply electric energy to the electrically conductive element, optionally by regulating voltage applied to the electrically conductive element and/or duration of application of said voltage, based on said electric parameter signal and on a desired value for a temperature of the heating surface of the heater (200, 202). - receiving said electric parameter signal and controlling the supply unit to supply electric energy to the electrically conductive element, optionally by regulating voltage applied to the electrically conductive element and/or duration of application of said voltage, based on said electric parameter signal and on a desired value for a temperature of the heating surface of the heater (200, 202).