[PSUBS-MAILIST] Lake quality sensors

[Alan via Personal_Submersibles]

Jon,
surprising they are not US compatible as they are based in California!
It communicates with I2C. I think they have a board they sell with it.
In your case, with your Arduino knowledge it would be easy to change
the output to Fahrenheit. I have also heard that they are quite willing
to modify products for you. Anyway you have a good temperature sensor now.
I am always looking for off the shelf cheap solutions but sadly they
are hard to come by in this field.
Alan
  

Sent from my iPad

> On 16/07/2018, at 7:24 AM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Blue Robotics items are not compatible for use in USA waters, Alan...celsius, bars, etc.  :) :)  Nice housings for their units, I really like those.  Had I known about these things back when I was fabricating my own I wouldn't have bothered.  Pretty sure I've got close to $50 in my LM34 unit and it doesn't look a bit cool compared to the Blue Robotics items.
> 
> Jon
> 
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Sunday, July 15, 2018 5:56 AM
> Subject: Re: [PSUBS-MAILIST] Lake quality sensors
> 
> Great video Jon.
> You look like you are doing the same as me, taking the long route &
> building everything.
> I don't know how critical the potting is in this case but I once potted
> wires out of a linear actuator like you did, then filled the actuator up
> with WD40. It just ran out between the pvc & resin like magic with no
> pressure at all applied.
> On my light build I stripped a section of the wire that went through the epoxy,
> epoxied it & then went over the outside of the fitting & wiring with a 3M
> 2 part heat activated pvc glue. I went an inch up the wiring with this as
> this is how I noted they did it with vulcanising on underwater connectors.
> I experimented with all sorts of glues & then went to an inflatable boat
> manufacturer who put me on to the 3M product. Over this I moulded 
> polyeurathane, but mainly as strain relief & aesthetics. It tested ok to 2000ft.
> BTW Blue Robotics are selling temperature sensors for about $50-
> https://www.bluerobotics.com/store/electronics/celsius-sensor-r1/
> Cheers Alan
>  
> 
> 
> Sent from my iPad
> 
>> On 15/07/2018, at 12:56 AM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> I documented encapsulating an LM34 temperature sensor which might interest you.  You can get the sensor at digikey, mouser, or any other similar distributor. 
>> 
>> https://youtu.be/-1iAJcph0Js
>> 
>> 
>> --------------------------------------------
>> On Fri, 7/13/18, Mark via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Subject: [PSUBS-MAILIST] Lake quality sensors
>> To: "Psubs" <Personal_Submersibles at psubs.org>
>> Date: Friday, July 13, 2018, 9:34 PM
>> 
>> Good afternoon, team psubs:
>> 
>> This year we are planning to give our
>> sub purpose.  We live on a small lake in North Carolina
>> where the lake depth averages between 20 and 30 feet. 
>> Our plan is to outfit the sub with sensors (and data
>> acquisition) to measure the lake water quality such as pH,
>> Dissolved Oxygen, Turbidity, Nitrogen, Total Coliform,
>> E-Coli, Temperature, etc.
>> 
>> Has anyone done this before?  Does
>> anyone have information where I could purchase these
>> sensors?
>> 
>> Regards,
>> 
>> Mark Widman
>> 910-638-5229
>> 
>> Sent from iPhone.
>> 
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