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, or other sensors suitable for inert gas monitoring. In industrial contexts, maintaining a controlled argon level is important to preserve an inert environment and to protect processes from oxidation. Oxygen sensors are often used in parallel to prevent asphyxiation in confined spaces, and calibration relies on known argon standards to ensure accuracy.

Applications of controlled argonniveau include arc welding with argon shielding gas (either 100% argon or blends with hydrogen, helium, or CO2), heat-treatment and annealing atmospheres, and semiconductor or glass manufacturing where inert conditions are required. Argon is favored for its chemical inertness and stable thermal properties, which support predictable process outcomes.

Health and safety considerations note that argon is non-toxic but denser than air and can displace oxygen in enclosed spaces. Proper ventilation, gas monitoring, and adherence to relevant safety standards are essential to mitigate asphyxiation risks and ensure safe handling of argon systems.