Does the O2ptima have a CO2 monitor?
No. CO2 monitoring is a ‘bleeding edge’ technology that will begin to appear in recreational rebreathers in the next few years but as a practical matter the merits of CO2 monitoring are unproven. You should not confuse a CO2 monitor with the breathing loop temperature monitor or the scrubber temperature monitor offered by rebreather manufacturers. The temperature monitor does not provide any information or warning regarding actual CO2 levels in the breathing loop. Regardless, the CO2 absorbent used in the O2ptima has an extremely consistent duration from cartridge to cartridge, so a temperature monitor is unnecessary.
