TIG torches come in a variety of sizes and current carrying capacities. Water-cooled torches are the most common air-cooled torches popular for portable field welding. Many torches can be fitted with micro switches for starting the arc and for current adjustment. Inert gas nozzles are made of a high temperature resistant ceramic material and come in a variety of shapes & sizes
TIG welding equipments are capable of modulating the welding-current. This means that the welding current varies between a higher and a lower value, with adjustable frequency (0.5-5 Hz) and duty cycle. This method is referred to as slow pulse welding. This facilitates the easy control of the quality of the weld.