The 2B Technologies Model 714 Calibration Source is a compact gas generator for NO2, NO and O3.
Via a patented (U.S. Patent No. 10,207,927) process, the 714 photolytically generates NO via N2O capsule cartridges. In addition, ozone is generated via a second photolysis chamber. Combining ozone and NO, NO2 can be produced by GPT (gas phase titration).