Does the Sentinel have a CO2 monitor?
No. As a practical matter, there may be little value to detecting CO2 already in the loop as it could be too late to warn the diver in time to react appropriately. The Sentinel does incorporate a patented Temperature Profile Monitor (TPM) under license from the US Navy. The Sentinel TPM displays a thermistor based bar chart of the temperature profile through the filter to give the diver information on the activity of absorbent. The temperature monitor does not provide any information or warning regarding actual CO2 levels in the breathing loop.