The Invertec® 400TPX are manufactured in a lightweight but robust outer casing, making them portable and ideal for operation, even in the most hazardous environments. They feature HF TIG ignition, Lift TIG ignition, 2 or 4 step, variable down slope and postflow control, a digital pre-set meter with a hold function and built-in variable Pulse. Unique pre-settable starting mode allow excellent HF arc start with any in any welding conditions while 10 memory locations for personal welding parameters setting and TIG Spot welding mode complete TIG welding features. They can also weld stick with a variety of popular stick electrodes including Cellulosic. They can be simply changed to water cooled units by adding the COOL ARC® 21 and COOL ARC® 46 Water Coolers. Robust, stable and well equipped carts are available for easy movement of the units.