ATI has recently released the new D16 PortaSens III Ozone Monitor, we now have these in-house available for sale. The D16 has replaced the the C16 PortaSens II ozone monitor, and has added new features to this device.
The D16 is the same size as the C16 and uses the same platform, also many of the ancillary parts, like the sensors, and the wand are interchangeable between the 2 devices. The main difference in the D16 is the touchscreen user interface.
The touchscreen interface on the D16 has aided in the user experience and has added features not available with the simple pushbutton design of the C16. See video below for an overview of the D16 features and what comes with the new D16