Optima vs Tempstick

Twain · 29th May 2007, 14:52

Quote: (Originally Posted by Mark Chase)

A scrubber lasts what 3 hours at 5c with a 40RMV. OK its pretty safe to say you can do four hours with a 20 RMV in 10c water and 5-6 isnt beyond the realms of possibility in 20c water with a 20rmv but you are pushing it and you damed well know it.

Quote: (Originally Posted by Mark Chase)

Link three explains how with the scrubber monitor you can extend the usage of the scrubber in favorable conditions. Something we have been doing for ages without a monitor.

So, this was the second part of my original question that started the thread (sorry for not replying more promptly!). How do you know what "pretty safe" is when you dive in a new temperature?

Hypothetical example: you normally dive cold water but take a trip to warm water like a Red Sea liveaboard. You know your scrubber will last longer, but how much longer? Trial-and-error certainly works: ie "it worked for X hours this time so I know that's safe". However trial-and-error when you're using yourself for the test seems like a risky way to gather data.

I'm all in favor of simply knowing what my cold-water and warm-water limits are. But I don't see a way of getting that knowledge without trial-and-error....and the "error" part of that technique seems risky.

jiseson · 29th May 2007, 14:55

Decided to pull the trigger and and buying an Optima-unit going in for FX upgrade. Excited !

Mark Chase · 29th May 2007, 16:21

Quote: (Originally Posted by Twain)

So, this was the second part of my original question that started the thread (sorry for not replying more promptly!). How do you know what "pretty safe" is when you dive in a new temperature?

Hypothetical example: you normally dive cold water but take a trip to warm water like a Red Sea liveaboard. You know your scrubber will last longer, but how much longer? Trial-and-error certainly works: ie "it worked for X hours this time so I know that's safe". However trial-and-error when you're using yourself for the test seems like a risky way to gather data.

I'm all in favor of simply knowing what my cold-water and warm-water limits are. But I don't see a way of getting that knowledge without trial-and-error....and the "error" part of that technique seems risky.

You stick to within manufacturers guide lines.

Your life insurance will probably not pay out when they find out you dived for longer than three hours on the same scrubber regardless of the water temperature. Your diving outside the recommended limits of the scrubber. Your not supposed tooo so they wont pay out.

On the other hand Get out of the water after say 3 hours on the scrubber, whip the back off the unit and feel the hot band on the scrubber with your hand. Or more importantly feel the cold band running up behind it. That will tell you how your doing.

ATB

Mark Chase

jptaylor9 · 29th May 2007, 18:09

AP Temp Stick - Part 4

Tom Mount likes it....

JT

n2diving · 29th May 2007, 18:33

Quote: (Originally Posted by jptaylor9)

Temp Stick - Part 4

Tom Mount likes it....

JT

Yes, he does seem to like it a lot. But it's one feature among many... lately he's diving an O2ptima...

bambang · 30th May 2007, 05:10

Hi Twain,

I would go with Evolution, because their Vision electronics is awesome..!!

Tempstik also cool, but you will be fine without it. FYI, the only thing that Tempstik does, is to determine which part of the scrubber that is active currently(Filtering them CO2). It doesnt measure CO2, scrubber length etc..

Cheers,

BB

29th May 2007, 14:52	#61 (permalink)
Twain New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Mar 2007 Location: Boston Posts: 22	Re: Optima vs Tempstick Quote: (Originally Posted by Mark Chase) A scrubber lasts what 3 hours at 5c with a 40RMV. OK its pretty safe to say you can do four hours with a 20 RMV in 10c water and 5-6 isnt beyond the realms of possibility in 20c water with a 20rmv but you are pushing it and you damed well know it. Quote: (Originally Posted by Mark Chase) Link three explains how with the scrubber monitor you can extend the usage of the scrubber in favorable conditions. Something we have been doing for ages without a monitor. So, this was the second part of my original question that started the thread (sorry for not replying more promptly!). How do you know what "pretty safe" is when you dive in a new temperature? Hypothetical example: you normally dive cold water but take a trip to warm water like a Red Sea liveaboard. You know your scrubber will last longer, but how much longer? Trial-and-error certainly works: ie "it worked for X hours this time so I know that's safe". However trial-and-error when you're using yourself for the test seems like a risky way to gather data. I'm all in favor of simply knowing what my cold-water and warm-water limits are. But I don't see a way of getting that knowledge without trial-and-error....and the "error" part of that technique seems risky.
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29th May 2007, 14:55	#62 (permalink)
jiseson DSIX/O2PTIMA Current Rebreather/s: Optima Other Rebreather/s: Join Date: Jun 2006 Location: long island,ny Posts: 544	Re: Optima vs Tempstick Decided to pull the trigger and and buying an Optima-unit going in for FX upgrade. Excited ! __________________ *Jonathan D Iseson*
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29th May 2007, 16:21	#63 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,561	Re: Optima vs Tempstick Quote: (Originally Posted by Twain) So, this was the second part of my original question that started the thread (sorry for not replying more promptly!). How do you know what "pretty safe" is when you dive in a new temperature? Hypothetical example: you normally dive cold water but take a trip to warm water like a Red Sea liveaboard. You know your scrubber will last longer, but how much longer? Trial-and-error certainly works: ie "it worked for X hours this time so I know that's safe". However trial-and-error when you're using yourself for the test seems like a risky way to gather data. I'm all in favor of simply knowing what my cold-water and warm-water limits are. But I don't see a way of getting that knowledge without trial-and-error....and the "error" part of that technique seems risky. You stick to within manufacturers guide lines. Your life insurance will probably not pay out when they find out you dived for longer than three hours on the same scrubber regardless of the water temperature. Your diving outside the recommended limits of the scrubber. Your not supposed tooo so they wont pay out. On the other hand Get out of the water after say 3 hours on the scrubber, whip the back off the unit and feel the hot band on the scrubber with your hand. Or more importantly feel the cold band running up behind it. That will tell you how your doing. ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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29th May 2007, 18:09	#64 (permalink)
jptaylor9 Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: London, UK Posts: 318	Re: Optima vs Tempstick AP Temp Stick - Part 4 Tom Mount likes it.... JT Last edited by jptaylor9 : 31st May 2007 at 09:08.
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29th May 2007, 18:33	#65 (permalink)
n2diving Custom Title Allowed! Current Rebreather/s: Optima Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Feb 2005 Location: Florida, USA Posts: 271	Re: Optima vs Tempstick Quote: (Originally Posted by jptaylor9) Temp Stick - Part 4 Tom Mount likes it.... JT Yes, he does seem to like it a lot. But it's one feature among many... lately he's diving an O2ptima...
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30th May 2007, 05:10	#66 (permalink)
bambang New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Aug 2006 Location: Jakarta Posts: 47	Re: Optima vs Tempstick Hi Twain, I would go with Evolution, because their Vision electronics is awesome..!! Tempstik also cool, but you will be fine without it. FYI, the only thing that Tempstik does, is to determine which part of the scrubber that is active currently(Filtering them CO2). It doesnt measure CO2, scrubber length etc.. Cheers, BB
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