argonniveau
Argonniveau is the concentration or partial pressure of argon, a noble gas, within a specific gas mixture or environment. In practical use the term describes shielding atmospheres in welding, inert processing chambers, and gas-delivery systems in laboratories and industry. Argon levels are usually expressed as a percentage by volume (mol%) or as a partial pressure (kPa). In natural air, argon accounts for about 0.93% by volume, but argonniveau in engineered systems is typically higher or nearly pure, depending on the application.
Measurement of argonniveau is carried out with gas analyzers such as mass spectrometers, thermal conductivity detectors,
Applications of controlled argonniveau include arc welding with argon shielding gas (either 100% argon or blends
Health and safety considerations note that argon is non-toxic but denser than air and can displace oxygen