> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/manifold-5l-and-manifold-5s-ethernet-switch/opening-and-re-closing-the-case/installing-a-penetrator-device-or-plug.md).

# Installing a Penetrator, Device, or Plug

Each of the six penetrator holes in the Manifold 5x requires either a penetrator with a cable, a plug, or a device such as a BAR30 pressure/temperature sensor.

Blue Robotics has a very nice explanation of how to prepare and install penetrators [here](https://bluerobotics.com/learn/wetlink-penetrator-installation-guide/).

{% hint style="info" %}
Water damage caused by leaks due to improper preparation or installation of penetrators or installation of the case back is not covered under warranty.
{% endhint %}

{% hint style="info" %}
Note that one penetrator position has internal threads. No nut is needed for this position. 
{% endhint %}


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