The WeldproTIGACDC200GD welder is an inverter based machine that  utilizes the most advanced inverter technology. IGBT circuits along with  PWM technology, along with the greatly reduced size and weight, enable  this welder to not only be more efficient by 30%, but also as a result  of the electronic circuitry, enables this ac/dc tig welding machine to  afford the user far more and better range of settings for each specific  weld.