[PSUBS-MAILIST] Lake quality sensors

[Alan via Personal_Submersibles]

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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> 
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