Trace oxygen sensor detects trace oxygen content in nitrogen

Nitrogen, with the chemical formula N₂, is usually a colorless and odorless gas, accounting for about 78% of the volume of air (about 21% of oxygen). Only about 0.02 volume of nitrogen is dissolved in 1 volume of water. High-purity gases play an important role in modern industry. High-purity nitrogen (N2) is one of the…