Do all rebreathers require a bailout bottle on board ?

[Whitrzac]

Unless something changed in the last 2 years the posidion will absolutly lock you out unless it gets serviced by a posiodon tech. A buddy had to dive oc because he let his posiodion tech cert lapse($600+) and couldn't unlock the computer.

 

[WOB0.01J]

Unless something changed in the last 2 years the posidion will absolutly lock you out unless it gets serviced by a posiodon tech. A buddy had to dive oc because he let his posiodion tech cert lapse($600+) and couldn't unlock the computer

I am a little confused about the “locking you out”. I think I would rather the unit forces me not to dive until it gets serviced than dive a unserviced unit and potentially cause a fatal accident. I am not certified on seven, just stating my opinion

 

[flymolo]

maybe this is a thread hijack, but what's so appealing about solid state cells? as long as you replace your traditional (galvanic) cells at recommended intervals and test them for linearity is there a need for something better?

 

[Big-swede]

maybe this is a thread hijack, but what's so appealing about solid state cells? as long as you replace your traditional (galvanic) cells at recommended intervals and test them for linearity is there a need for something better?

The galvanic cells is one of the weakest points of modern rebreathers. The whole reason for voting algorithms, multiple cells, extra calibration etc is that the cells are not reliable

 

[Big-swede]

Unless something changed in the last 2 years the posidion will absolutly lock you out unless it gets serviced by a posiodon tech. A buddy had to dive oc because he let his posiodion tech cert lapse($600+) and couldn't unlock the computer.

Sounds like another "a friend told" me story.
Just like saying "this is a **** border patrol! Just because i didnt bring my passport they wont let me in the country "

Edit. After a quick google the tech course on the top result is 300 bucks so i guess renewal is cheaper.

 

[flymolo]

The galvanic cells is one of the weakest points of modern rebreathers. The whole reason for voting algorithms, multiple cells, extra calibration etc is that the cells are not reliable

Are they really that bad? I personally haven’t experienced nearly enough failures to warrant replacing mine with solid state sensors that cost around 10x the price. I feel like the rate of failure is highly overstated when using cells from a reliable manufacturer.

Even if I did eventually go in that direction I couldn’t see running less than 2 or 3 cells. You’d still need to verify to which one is broken even if the rate of failure is less.

I don’t think the galvanic cells are nearly as bad as people say.

 

[Whitrzac]

Are they really that bad? I personally haven’t experienced nearly enough failures to warrant replacing mine with solid state sensors that cost around 10x the price. I feel like the rate of failure is highly overstated when using cells from a reliable manufacturer.

Even if I did eventually go in that direction I couldn’t see running less than 2 or 3 cells. You’d still need to verify to which one is broken even if the rate of failure is less.

I don’t think the galvanic cells are nearly as bad as people say.

Only when paying the posidion tax, Theyre about $450 through anyone else

 

[Big-swede]

Are they really that bad? I personally haven’t experienced nearly enough failures to warrant replacing mine with solid state sensors that cost around 10x the price. I feel like the rate of failure is highly overstated when using cells from a reliable manufacturer.

Even if I did eventually go in that direction I couldn’t see running less than 2 or 3 cells. You’d still need to verify to which one is broken even if the rate of failure is less.

I don’t think the galvanic cells are nearly as bad as people say.

Yes they are.
But i agree on the price. Hopefully it will drop now that the patent or what it now was has opened up.

 

[flymolo]

Yes they are.

Can you give me a reason why? I'm not experiencing failures left and right like some would have you believe. I hardly even think about my cells (though I test the linearity every time, and calibrate when there is drift)

 

[Big-swede]

Can you give me a reason why? I'm not experiencing failures left and right like some would have you believe. I hardly even think about my cells (though I test the linearity every time, and calibrate when there is drift)

If they where reliable you would not need multiple systems to make sure they are working and backing them up when they fail.
Just scroll through this forum and you will find examples of failures.

Im not saying the solid state sensors are the perfect solution, we will probably need a couple more years of usage before we really know their pros and cons but from what i have heard and seen they are pretty darn reliable.