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have to agree with you rod, the japanese left out the sensor (surely only
for now) but included the depth buzzer.  since their unit is only to be used
with one gas it makes a little sense.

talked to tracy today about installing a sensor in the fineos, he is working
on a kit that can be used on any unit.

dp

On Wed, 20 Mar 1996, rfarb wrote:

> 
> On Wed, 20 Mar 1996, Peter Den Haan wrote:
> 
> > step up from open circuit compared to fully closed. A correctly designed 
> > semi-closed system, so far not available yet, can be as safe as open 
> > circuit and would not require electronics or an O2 sensor. However, the 
> > 
> 
> I don't agree. It is quite possible to dive a semi-closed nitrox 
> rebreather too deep and die because elevated pO2. A audible or visual alarm 
> warning the diver that this has occurred would be essential. A depth 
> guage is passive; it requires the diver to look at it to see if the depth 
> has been exceeded. A simple oxygen sensor at the scrubber exit cannected 
> to an alarm is a ridiculous omission. Somebody could build a simple device 
> that could be worn on your arm that would be beneficial to OC divers as 
> well. An oxygen sensor wired to an audible alarm with the appropriate 
> electronics sealed in a container that is purged with your breathing gas 
> and sealed before each dive would buzz when the pO2 inside the container 
> exceeded the setpoint. Rod
> --
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