Inexpensive Cat5e connector

I haven’t posted on BR in many years. I go way back to when BR was in its’ infancy and catered to the DIY community. I had a lot of success with my ROV design using BR products, a Cat5e tether and keeping the cost under $500. My ROV made over 50 dives to 60- 100 feet photographing the reefs off of Jacksonville Beach, FL.

You can view the videos on my YouTube channel Richard Fast. The biggest problem I encountered was strong ocean currents at depth and maintaining situational awareness. I used a magnetic compass mounted outside the enclosure and viewed on my topside monitor. Here is an old post describing the build: Under Sea Rover 1 (USR1) - Build / DIY ROVs - Blue Robotics Community Forums
I became discouraged due to the position keeping difficulties, among other things, and sold the components here on BR. I just stuck with the great fishing at the reefs.

I have since moved to Kansas City and I have become interested in lake bottom exploration. Here the problem is poor visibility where 2-4 feet is considered good. I only need depth capability to 50 feet, and it is, of course, fresh water. There are many fewer problems than 100 ft in the saltwater, 2 knot current environment.

The purpose of this post is to get back involved in ROV’s and to ask if any of you have experience with the following connecter?
Waterproof Coupler | Cat5e/Cat6 Shielded RJ45 |

Not having a way to disconnect the tether at either end is a real pain-in-the-butt, as you know. Thought I would ask here before spending the money to try it out. I am only sending 8 volt DC current signals through the tether so some water leakage shouldn’t be a problem.


Rusty, are you still at BR? You were always so helpful.

@model14 - Welcome back! I’m still here :slight_smile:

There are certainly new challenges in inland lakes, but hopefully the shallower depth and lake of current will make things a little easier!

We don’t have any experience with RJ45 couplers like that one, but it might be worth a shot! Since you were here last, we’ve switched all of our cable pass-throughs to our new WetLink Penetrator, which uses a rubber seal like this cable gland, albeit one tested for operation at depth!

I’m sure others may have suggestions for connectors to share!


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Hi Richard,

You could try out our 8-pin Cobalt connectors at

You would put the 8-pin bulkhead connector on your electronics enclosure and then use the 8-pin Cable Termination Kit to terminate your tether.


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Thanks Damon. I have viewed your website and would certainly consider your connectors if I was still pursuing the saltwater environment. In my case of 50ft fresh water, I want to try the RJ45 connector and see what happens to the video. I know the analog 8 volts will be okay.