​The Model N703U trace-level ozone calibrator is designed for calibration and verification of precision gas analyzers. Combining an integrated ozone generator with a high-accuracy UV photometer, the N703U provides stable and repeatable ozone concentrations across a wide operating range, including ultra-low levels required for modern ambient monitoring applications.

The ozone calibrator uses a photolytic ozone generator and photometer feedback to continuously monitor and control ozone output, ensuring accurate concentration delivery and long-term stability. Adjustable flow rates support both low-level and high-output applications, with flexible automation capabilities for routine calibration tasks.

Instrument functions are managed through a distributed CAN Bus based electronics architecture with independently controlled modules. This design isolates faults to individual modules, simplifying troubleshooting and field service while improving overall system reliability and uptime.​

Operation and calibration are managed through the NumaView​™ software interface, with remote access providing full control and access to internal data storage from a PC or tablet.