A free 3D-printable solution for running sensor cables into your North Spore Boomr Bin.
If you've ever tried running a sensor cable into a monotub, you've probably run into the same problem I have: how do you get the cable inside without cutting up your filter patches?
Sure, you can grab a utility knife and make an opening. But if you've seen my latest video, you already know I probably shouldn't be trusted with one.
I figured there had to be a better way.
After quite a bit of designing, prototyping, failed prints, and testing, I'm excited to finally release my Rotating Sensor Cable Gland!
And the best part? The files are completely free to download for personal use.
What Is the Rotating Sensor Cable Gland?
The Rotating Sensor Cable Gland is a 3D-printed adapter designed specifically for the North Spore Boomr Bin.
Its purpose is simple: allow sensor cables to pass into your monotub without permanently modifying or cutting your filter patches.
The design supports up to two sensor cables, making it useful for growers who want to monitor conditions inside their tubs using sensors from brands like VIVOSUN, AC Infinity, or North Spore.
Key Features
Three selectable positions: One cable, two cables, or fully closed when no cables are installed.
Removable top section: Allows sensor cables to be inserted before reassembly.
Filter compatibility: Supports a standard 2-inch filter patch over the main opening.
Optional cap: Close off the main opening entirely when a filter isn't needed.
Flexible construction: A TPU exterior with an internal PETG reinforcement structure for additional rigidity.
Friction-fit installation: Designed to fit the North Spore Boomr Bin without permanent modifications.
The rotating mechanism allows you to close the cable openings when they're not being used. When installing cables, you'll need to remove the top section, insert your cables, and reassemble the gland.
Why I Made It
One of the things I've enjoyed most about designing accessories for mushroom cultivation is finding small problems that could use a better solution.
This project started because I wanted to experiment with different environmental sensors without constantly modifying my equipment.
Cutting filter patches works, but it isn't particularly elegant, especially when you're regularly changing your setup or testing different sensors.
I wanted something reusable, adaptable, and easy to install.
What started as a relatively simple idea eventually became a more complicated design involving flexible materials, internal reinforcement, and a rotating mechanism.
As usual, this seemed easier when I first started.
Free Downloads Are Now Available!
I believe useful designs should be accessible to people who want to experiment, learn, and improve their own setups.
That's why I'm making the Rotating Sensor Cable Gland available to download for free for personal use.
You can find the model on all three platforms:
MakerWorld:
https://makerworld.com/en/models/3538266-rotating-sensor-cable-gland#profileId-4046316
Printables:
https://www.printables.com/model/1902225-rotating-sensor-cable-gland
Thingiverse:
https://www.thingiverse.com/thing:7430969
Don't Have a 3D Printer?
Not everyone has access to a 3D printer, and that's completely understandable.
For those who would rather purchase a finished product, I'm also offering physical versions through my store at thisseemedeasier.com.
Please be aware that production may take a few extra days while I work through some issues with my second printer. I want to make sure every product meets my quality standards before shipping.
This Design Isn't Finished
Although the Rotating Sensor Cable Gland is officially released, I don't consider it a finished project.
There are still improvements I'd like to explore.
I'm currently looking into several quality-of-life changes, including refining the geometry, improving usability, and making the design easier to manufacture.
I'm also exploring ways to improve the surface finish of the physical versions I sell. Reducing visible 3D-printing layer lines could make the plugs easier to clean and maintain.
Another goal is expanding compatibility beyond the North Spore Boomr Bin.
I'd eventually like to support other monotub brands and potentially make the design more adaptable for DIY builds.
Future improvements to the downloadable design will continue to be released for free.
Something I Hadn't Considered: Bugs!
One interesting thing about sharing projects publicly is hearing perspectives I hadn't considered.
After announcing the release on Reddit, someone pointed out that the cable gland could also be useful for growers dealing with fungus gnats and other insects entering their monotubs.
That honestly hadn't crossed my mind!
We don't get many of those pests where I live, so insect prevention wasn't one of my original design goals.
While I haven't specifically tested the gland for insect exclusion, it's another potential benefit worth exploring as I continue developing the design.
It's also a good example of why community feedback matters.
What's Next?
For now, my priorities are refining the model, improving print reliability, and building up enough inventory to keep physical versions readily available.
Eventually, I'd like to put more effort into promoting the product, but I want to make sure I can consistently produce and ship quality parts first.
In the meantime, I'll continue sharing updates, improvements, and other projects as I work through them.
Thank You for Supporting This Seemed Easier
Whether you download one of my models, purchase something from my store, share my projects, or simply leave feedback, I appreciate the support.
I'm not a professional product designer. I'm just someone who enjoys finding problems, experimenting with solutions, and sharing what I learn along the way.
If you print a cable gland, I'd love to see how it turns out. And if you have suggestions for improvements or ideas for other equipment you'd like to see supported, please reach out!
Thanks for following along.
This Seemed Easier. Confidently unqualified.
