Ultraviolet (UV) analyzers detect gaseous compounds that exhibit UV absorption, most notably ozone (O₃), nitrogen dioxide (NO₂), and benzene.
- Principle: These analyzers measure the attenuation of UV light as it passes through the gas sample. Each compound absorbs light at characteristic wavelengths.
- EP Use Case: Detection of ozone in oxygen or compressed air, and benzene in nitrous oxide or carbon dioxide.
- Advantages: Non-destructive, continuous monitoring with high selectivity for specific UV-absorbing gases.
