PSI Ozone
PSI Ozone Dual-Beam UV-Absorption Photometer

The PSI Ozone Dual-Beam UV-Absorption Photometer is an in situ airborne photometer manufactured by Physical Sciences, Inc. (PSI). It uses dual-beam absorption at 254 nm to detect ozone concentrations. It operates similarly to the NOAA Ozone photometer but with improved thermal stability, lower power consumption, and smaller flow rate. PSI Ozone has a typical data rate of 1 Hz and a detection sensitivity of 1 ppb at sea level