E-man

As all these tests keep seeming to show, I think rebreather manufacturers need to show more absorbent capacity test data, under different protocols. i.e. lower co2 rates coupled with short high co2 bursts, which seems a LOT closer to acctual diving scenarios. No one can keep up 1.6lpm for over 20 mins, heck no one can keep up 1.35 lpm for over 20 mins, but they can do bursts of up to 5 lpm of CO2.

My bits of useless data I'll throw in

VO2 = volume of O2 consumed
VCO2 = volume of CO2 produced
VE = Volume exhaled (RMV)
RER = Respitory quotiont (Co2 produced per L of O2 consumed)
RR = Respitory rate (breaths per min (bpm))
Vt = Tidal Volume
FEO2 = Fraction exhaled O2
FECO2 = fraction exhaled CO2

VE(RMV) is derived from RR (BPM) * Vt(Tidal Volume)

RER (Respitory Quotient) is usually assumed to be ~0.85 CO2 produced to O2 consumed (i.e. 1.6lpm = 2lpm of O2 consumed)

The CE spec tests (used by AP, et al) are at 1.6lpm CO2, 40 RMV (20 RR(BPM) and 2L Vt(Tidal Volume)) which equates to 4% FeCO2