In Danish |
Active flow
semi-closed rebreather
Also known as a constant mass injection rebreather, which is actually very
describing. This type of rebreather is normally fed from a tank of pre-mix
with relatively high oxygen content. This pre-mix is added through a nozzle
into the loop in a weak but constant flow. The percentage of oxygen in the
loop is dependant on the metabolism of the diver’s body, which you will have
to estimate prior to the dive. For instant an EAN40 pre-mix, with a flow
rate of 10 litres/minute and a metabolism of 1 litre/minute, will result in
a breathing gas equivalent to an EAN33. An advantage of diving with a SCR is
the gas consumption, because the consumption is not dependant on the dive
depth. The SCR is a sort of "gas extender". The down faults is the
uncertainty of the actual oxygen level in the loop, and the necessity of a
separate bailout gas if you dive deeper than the pre-mix MOD. |
