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  • Welding
    is often critical. Unwanted gases react with the molten metal to cause strength-reducing oxides and inclusions within the weld. Arc-welding processes vary mainly in the way the weld is shielded and the methods of applying filler material. This form of welding, also called stick welding, is usually done
  • Guarding against arc flash
    to a loss of eyesight. It can also spew molten metal considerable distances where it can lodge in skin or ignite clothing. A 10,000-A arc on a 480-V circuit is said to have the explosive force of eight sticks of dynamite. The National Fire Protection Agency (NFPA), Occupational Safety and Health
  • Capacitive sensors
    rice, barley malt, corn, and soybeans in possibly explosive areas, such as grain elevators. Two metallic electrodes or plates create the sensing element in a capacitive proximity detector. The electrodes form a capacitor in the feedback loop of a high-frequency oscillator. The amount of capacitance

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