Which device should be used to verify argon flow for TIG welding?

• A. Flowmeter (usually 15-20 CFH)
• B. Pressure Gauge
• C. Thermocouple
• D. Voltmeter

Answer: (A)

To protect the weld with shielding gas, you verify the argon flow with a flowmeter, because it directly shows the actual flow rate entering the torch, typically read in CFH (often around 15-20 CFH for many TIG welds). A flowmeter lets you see and adjust how much gas is moving, ensuring consistent shielding of the molten pool. A pressure gauge only measures the gas pressure in the line, which doesn’t guarantee the flow rate and can be misleading if regulators or fittings change. A thermocouple measures temperature, not gas movement, and a voltmeter measures electrical potential, not gas flow. So the flowmeter is the appropriate device for verifying argon flow.