What is different about a gas lens compared to a gas cup or nozzle? Is there simply one option that is always better than the other? The secret to TIG welding success lies in its ability to shield the arc from contaminants in the atmosphere using the argon shielding gas we covered in the last module. The high-pressure argon is connected to a regulator which controls the gas flow rate and supplies it to our welder where we can switch this flow on or off via our torch or foot pedal through an inte