Image Credit: Lincoln Electric Co. (The)Lincoln Electric’s Square Wave® TIG 200 is a portable tungsten inert gas (TIG) and stick welding machine that provides smooth and stable AC TIG welding on aluminum and DC TIG welding on steel, stainless steel and chrome-moly.

The multi-process machine has advanced features that help fabricators expand their welding expertise and explore their creativity. The simple user interface allows setting of AC frequency, AC balance and pulse rate. Users can adjust these settings to control the width of the welding bead, depth of penetration or moderate deposition rate for precise TIG welds.

Designed for portability and convenience the welder weighs only 46 lbs and the power source operates off either a single phase 120 volt or 230 volt circuit.