Have you got a CCR? Going diving? Be sure you are going to get in the water and do the dive. Dive a Lungfish Orca v6 Tech.
Not only does the Orca v6 have a host of high-performance features:
CO2 Sensor as standard
Options of 3-4 Oxygen sensors in on and off board combinations
Built in depth/pressure sensor
Sophisticated electronics and programming to capture and analyse all that data