[PSUBS-MAILIST] Personal_Submersibles Digest, Vol 44, Issue 14

Fri Feb 3 06:05:19 EST 2017

Hi Frankie,welcome along.I'm from New Zealand. I went to a Psubs conference down in Islamorada a couple of yearsago. Alec put his K250 "Snoopy" on the auto train & came down from Washington; so don't think you are limited to the local depth. Doug now owns "Snoopy" & has had it diving in Islamorada recently.It would be good to look through Snoopy if you get a chance.I agree with the other comments, that if you are bothering to build a sub to 250ft, don't skimp on the dome. Even at 40ft, you would not pick up a dome "off the shelf" that would be strong enough, & you would need it purpose built out of the right materials by someone who knows what they are doing.I am not sure of your best option for buying a 250ft dome! Emile in the Netherlands makes them& seamagine Hydrospace in California. Others may know of better options.Cheers Alan

      From: Frankie Bowman via Personal_Submersibles <personal_submersibles at psubs.org>
 To: personal_submersibles at psubs.org; personal_submersibles-request at psubs.org 
 Sent: Friday, February 3, 2017 2:21 PM
 Subject: Re: [PSUBS-MAILIST] Personal_Submersibles Digest, Vol 44, Issue 14

DHello everyone my name is Frank Bowman I live in Tampa Florida I am currently accumulating parts to build a k250 sub I have loved this model for years since I saw one on the side of the road in key west! I have always wanted to build one and I'm finally going to do it! Our bay is only 20feet deep on a good day except for in the sipping channel wich is 43 feet and much to busy to play in I plan on building the sub to the original plans that I will be purchasing soon any recommendations on acrylic thickness for the depth of water I'll be diving in and ideas on hatches would be greatly appreciated! 
On Feb 2, 2017 6:18 PM, "via Personal_Submersibles" <personal_submersibles at psubs.org> wrote:

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Today's Topics:

   1. scrubber performance (River Dolfi via Personal_Submersibles)
   2. Re: scrubber performance (Alan via Personal_Submersibles)
   3. Re: co2 scrubber (via Personal_Submersibles)
   4. Re: scrubber performance (via Personal_Submersibles)
   5. Re: co2 scrubber (hank pronk via Personal_Submersibles)

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Message: 1
Date: Thu, 2 Feb 2017 15:37:01 -0500
From: River Dolfi via Personal_Submersibles
        <personal_submersibles at psubs. org>
To: personal_submersibles at psubs. org
Subject: [PSUBS-MAILIST] scrubber performance
Message-ID:
        <CAGL1GvHsasWDuKzFqyDZi0gpR_ ONjXRm+pomH8=EpZJKKop9vw at mail. gmail.com>
Content-Type: text/plain; charset="utf-8"

I did side-by-side tests on several low-cost ambient CO2 sensors when I was
doing air quality instrumentation work, and I eventually settled on these
units from COZIR.
http://www.co2meter.com/ products/cozir-0-2-co2-sensor

They're only about $70US, have built in self calibration, super reliable,
and have very low current draw compared to other sensors. The big rub is
that it isn't analog output, but serial.

You would have to interface it with a microcontroller (which is an easy
enough job with a $20 Arduino) and have it set up to display to an LCD,
trip an alarm at critical levels, possible demand control of the scrubber,
other sensors, etc.

I have an identical system built for the health department currently
running 70 (70!!!) of these sensors and others on battery power across the
city in the elements. They are that good.

I recently found about half of a medical scrubber in a dumpster, so I've
been thinking about life support lately.
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Message: 2
Date: Fri, 3 Feb 2017 10:30:12 +1300
From: Alan via Personal_Submersibles <personal_submersibles at psubs. org>
To: Personal Submersibles General Discussion
        <personal_submersibles at psubs. org>
Subject: Re: [PSUBS-MAILIST] scrubber performance
Message-ID: <AC997834-A066-4D52-9769- EA45A14D61A6 at yahoo.com>
Content-Type: text/plain; charset="us-ascii"

That looks good River.
They have a sensor pump kit add on.
http://www.co2meter.com/ collections/co2-sensors/ products/gas-sensor-micro-pump
Is this necessary? Does the unit need to be put in an air flow?
I noticed other add ons, like water filter. Any recommendations regarding required add ons.
Alan

Sent from my iPad

> On 3/02/2017, at 9:37 AM, River Dolfi via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
>
> I did side-by-side tests on several low-cost ambient CO2 sensors when I was doing air quality instrumentation work, and I eventually settled on these units from COZIR.
> http://www.co2meter.com/ products/cozir-0-2-co2-sensor
>
> They're only about $70US, have built in self calibration, super reliable, and have very low current draw compared to other sensors. The big rub is that it isn't analog output, but serial.
>
> You would have to interface it with a microcontroller (which is an easy enough job with a $20 Arduino) and have it set up to display to an LCD, trip an alarm at critical levels, possible demand control of the scrubber, other sensors, etc.
>
> I have an identical system built for the health department currently running 70 (70!!!) of these sensors and others on battery power across the city in the elements. They are that good.
>
> I recently found about half of a medical scrubber in a dumpster, so I've been thinking about life support lately.
> ______________________________ _________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs. org
> http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles
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Message: 3
Date: Thu, 2 Feb 2017 16:29:34 -0600
From: via Personal_Submersibles <personal_submersibles at psubs. org>
To: Personal Submersibles General Discussion
        <personal_submersibles at psubs. org>
Subject: Re: [PSUBS-MAILIST] co2 scrubber
Message-ID: <A4F1E58C-8CD0-4968-ACF8- B5C1623AD4B9 at gmail.com>
Content-Type: text/plain; charset="us-ascii"

Started life with axial scrubber but now use radial design.  Has worked much better for me.

Cliff

Sent from my iPad

> On Feb 2, 2017, at 1:06 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
>
> Thanks' guys, that helps.
> Cliff, I assume you have an axial scrubber
> Hank
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Message: 4
Date: Thu, 2 Feb 2017 16:46:57 -0600
From: via Personal_Submersibles <personal_submersibles at psubs. org>
To: Personal Submersibles General Discussion
        <personal_submersibles at psubs. org>
Subject: Re: [PSUBS-MAILIST] scrubber performance
Message-ID: <09EAACC2-6221-4879-A137- ADE7EABDEA40 at gmail.com>
Content-Type: text/plain; charset="us-ascii"

I have had good performance from this company but with their K30 sensor.  $85 and does give 0-5v analog output signal.  It span is 0-10,000 ppm (0-2%).

Cliff

Sent from my iPad

> On Feb 2, 2017, at 2:37 PM, River Dolfi via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
>
> I did side-by-side tests on several low-cost ambient CO2 sensors when I was doing air quality instrumentation work, and I eventually settled on these units from COZIR.
> http://www.co2meter.com/ products/cozir-0-2-co2-sensor
>
> They're only about $70US, have built in self calibration, super reliable, and have very low current draw compared to other sensors. The big rub is that it isn't analog output, but serial.
>
> You would have to interface it with a microcontroller (which is an easy enough job with a $20 Arduino) and have it set up to display to an LCD, trip an alarm at critical levels, possible demand control of the scrubber, other sensors, etc.
>
> I have an identical system built for the health department currently running 70 (70!!!) of these sensors and others on battery power across the city in the elements. They are that good.
>
> I recently found about half of a medical scrubber in a dumpster, so I've been thinking about life support lately.
> ______________________________ _________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs. org
> http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles
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Message: 5
Date: Thu, 2 Feb 2017 23:12:52 +0000 (UTC)
From: hank pronk via Personal_Submersibles
        <personal_submersibles at psubs. org>
To: Personal Submersibles General Discussion
        <personal_submersibles at psubs. org>
Subject: Re: [PSUBS-MAILIST] co2 scrubber
Message-ID: <1219036942.614686. 1486077172632 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

I am a dope, lol, I was mixed up on the?terminology , I had an axial and have just installed a new radial scrubber.Hank

    On Thursday, February 2, 2017 3:29 PM, via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

 Started life with axial scrubber but now use radial design. ?Has worked much better for me.
Cliff

Sent from my iPad
On Feb 2, 2017, at 1:06 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

Thanks' guys, that helps. ?Cliff, I assume you have an axial scrubberHank

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