![](https://immediac.blob.core.windows.net/prooceanus/images/PSI%20Web%202021%20Product%20Circles%20CO2CV.jpg)
The most versatile and accurate submersible sensor for monitoring pCO2, our flagship model is deployed on moorings, profilers and underway in studies of the near surface to the deep ocean.
![](https://immediac.blob.core.windows.net/prooceanus/images/PSI%20Web%202021%20Product%20Circles%20CO2ProAtmo.jpg)
Ruggedly designed for CO2-flux studies in the harshest environments; integrated on ocean buoys around the world.
![](https://immediac.blob.core.windows.net/prooceanus/images/PSI%20Web%202021%20Product%20Circles%20GTDPro.jpg)
The most accurate sensor in the world for measuring total dissolved gas pressure in studies of gas build-up, air-sea gas flux, and net biological production.
![](https://immediac.blob.core.windows.net/prooceanus/images/PSI%20Web%202021%20Product%20Circles%20CO2Pro.jpg)
Our flagship model for accurate pCO2 monitoring in shallow water features our patented tubular interface with antifouling.
![](https://immediac.blob.core.windows.net/prooceanus/images/mooringFrameCageThumb.jpg)
Battery packs, water pumps, integration cables, antifouling protection, cages and mounts.