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Inspiration rebreather
Inspiration
CCR is produced by Ambient Pressure Diving in Great Britain. It is the
world's undisputed champion of fully closed rebreathers, with 5000-6000
units in use world wide.
It's an electronically controlled CCR
(ECCR), which means that the monitoring and
replenishment of oxygen is done by an onboard computer. In more practical
terms, the monitoring of the oxygen percentage is done by three oxygen
sensors which are presented for the diver in the two identical handsets.
Here the diver can programme the wanted PO2 (so called set point). If the
oxygen percentage in the breathing loop drops under the set point, the CCR
will burst oxygen into the loop through the solenoid. This is repeated until
the set point and loop content is in harmony. When the diver reaches the
depth, the CCR will maintain the set point within the second decimal. You
can compare this to a continuous flow mixer panel that you bring with you
under water that constantly varies the fraction of oxygen in the loop to
maintain constant PO2 (see
diagram). The
unit can at all times be overwritten manually or dived as a semi closed
unit, should something go wrong with the electronics. |
