9 Sensors for measuring acceleration, speed, pressure, mechanical stress, mechanical tension, torsion, temperature, liquid level, flow of liquids and gases, humidity, surface waves, surface acoustic waves, sound, ultrasound, microwaves, vibration, shock, electric current, electric voltage, electric power, electric energy, electric impedance, electric power factor, the quality of isolation liquid, and dissolved gas analysis; detectors for detecting and measuring partial electrical discharge current, leak detectors for vacuum apparatuses, vacuum pumps, and vacuum chambers; sensor switches for activating and deactivating power; electrical controllers; automatic control apparatus for controlling electrical transformers, electrical coils, electronic valves, electronic switches, motor drives; industrial process control software; transmitters for telecommunications and transmitting measurement data, namely, electrical usage measurement data and measurement data relating to acceleration, speed, pressure, mechanical stress, mechanical tension, torsion, temperature, liquid level, flow of liquids and gases, humidity, surface waves, surface acoustic waves, sound, ultrasound, microwaves, vibration, shock, electric current, electric voltage, electric power, electric energy, electric impedance, electric power factor, the quality of isolation liquid, dissolved gas analysis, partial electrical discharge current, and to leaks of vacuum apparatuses, vacuum pumps, and vacuum chambers; protective sports headgear, namely, bicycle helmets