The Model 465L UV Photometric Ozone Monitor is an extremely stable analyzer, ideal for critical low-level ppm safety and process applications. Its calibration is NIST traceable and the included pressure and temperature compensation ensure high accuracy under all conditions. The Model 465L is available in a 19” rack mount or NEMA 4X wall mount enclosure and can be purchased as either a single stream unit or as a multi-channel unit capable of monitoring up to six individual sample streams.