Airtight Connection between a Sensor and Arduino

Discussion in 'General Electronics Chat' started by Natalie Mueller, Jan 31, 2018.

  1. Natalie Mueller

    Thread Starter New Member

    Jan 31, 2018
    Hello guys:)
    I am looking for electrical connectors and would need help to find the correct one for my project.
    For my project, I am searching to have some kind of airtight connection between a sensor and Arduino board.
    The sensor will be placed in an acrylic box, which will be pressurized (low pressure changes). The arduino will be outside the box. The sensor needs three connecting cables to the Arduino. It would be great if this connector would have some kind of external thread so I could place that easily into one of my sheets using a tap.
    Maybe you have a great idea:) FYI at this point I would prefer a cable connection, instead of a wireless one.

    Thanks so much for your help
  2. ebeowulf17

    Distinguished Member

    Aug 12, 2014
    I'm sure there will be much better ideas from others, but the first thing that comes to mind is taking a liquid tight conduit fitting, which already has threads and clamping capabilities, and running wires through it with a while lot of caulk, epoxy, potting compound, or something similar filling the empty space.

    How air tight does it need to be... I wonder if the space within each insulated wire, between the strands of copper and the insulation, is a threat.
    Natalie Mueller likes this.
  3. bertus


    Apr 5, 2008

    You could also look for vacuum feedthrough connectors:
    vacuum feedthrough connector

    Those are most times sealed with rubber o-rings.

    Natalie Mueller likes this.
  4. Reloadron

    Distinguished Member

    Jan 15, 2015
    Pave Technology Company comes to mind but there are dozens of similar companies making connectors which will function under various vacuum and pressure conditions. Low pressure would be what? 10 PSI more or less? Would you like the engineering units in PSI or maybe BAR?

    Using a compression fitting you could likely roll your own using RTV or similar.There are various feedthrough and bulkhead designs out there so it really depends on exactly what you want.

    Natalie Mueller likes this.
  5. Natalie Mueller

    Thread Starter New Member

    Jan 31, 2018
    Thank you everyone so much for your help!
    I will look up the companies and the connectors you mentioned!
    Have a nice day guys!