Underwater data acquisition project

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Discussion Overview

The discussion revolves around the challenges of designing a self-contained underwater data acquisition system, specifically focusing on measuring load applied to a submerged chain. Participants explore options for enclosing a 24v power supply suitable for underwater use, considering the need for hermetic sealing and cable ports.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Sean describes the requirements for his project, including the need for IP68 load cells and a datalogger, and seeks advice on enclosing a 24v power supply for underwater use.
  • One participant suggests checking dive shops for underwater battery packs, noting that such products may be useful for the project.
  • Sean reiterates his project requirements and expresses difficulty in finding suitable IP68 enclosures with cable ports.
  • Another participant mentions a specific company (ODI) that may provide the necessary connections for Sean's project.
  • Okefenokee points out that many underwater battery packs are too large for Sean's application.
  • Stewartcs shares that they are exploring options from Seacon and mentions a lithium polymer 14.8v DC source that is IP68 rated, although it is not yet in production.

Areas of Agreement / Disagreement

Participants express various opinions on potential solutions for underwater power supply enclosures, with no consensus reached on the best approach. Some participants suggest alternatives while others share specific product insights, indicating a range of options and preferences.

Contextual Notes

Participants have not resolved the specific requirements for the power supply enclosure, and there are limitations regarding the availability of suitable products and the size constraints for Sean's application.

seanski06
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I'm currently working on a project where I am required to measure the load that is applied to a chain, which is submersed in an underwater tank (approx. 20 feet). The entire assembly must be self contained and hermetically sealed for up to 6 months.

I've successfully sourced some good ip68 load cells and a datalogger, however I'm trying to figure out the best approach to enclosing a 24v power supply needed to power my sensors.

Does anyone have any experience working with electronics underwater? I can't seem to find much info on some good ip68 enclosures that will allow a cable port.

The most idealsolution would be a self contained 24v power supply that would consist of a box with two wires coming off of it.

Thanks for any help,
-Sean
 
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Someone around these parts may have a better answer for you but have you tried looking in a dive shop to see what they have? I know they have big underwater battery packs for things like flashlights. Maybe you could use one of those.
 
seanski06 said:
I'm currently working on a project where I am required to measure the load that is applied to a chain, which is submersed in an underwater tank (approx. 20 feet). The entire assembly must be self contained and hermetically sealed for up to 6 months.

I've successfully sourced some good ip68 load cells and a datalogger, however I'm trying to figure out the best approach to enclosing a 24v power supply needed to power my sensors.

Does anyone have any experience working with electronics underwater? I can't seem to find much info on some good ip68 enclosures that will allow a cable port.

The most idealsolution would be a self contained 24v power supply that would consist of a box with two wires coming off of it.

Thanks for any help,
-Sean

Sean,

http://www.odi.com/" make the connections you seek.

CS
 
Last edited by a moderator:
Okefenokee: Most of those underwater battery packs are way too large for my application

Stewartcs: thanks for the info about ODI, I've been looking into what Seacon had, having more options is always a good thing

I found a really neat lithium polymer 14.8v dc source IP68 all the way...Unfortunately, the company has not decided to make them, I guess their just gauging interest
 

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