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Ingress Protection for Robotics Cases

Discussion in 'Robotics & Mechatronics' started by Wirth's Law, Jun 17, 2017.

  1. Wirth's Law

    Wirth's Law New Member

    Aug 14, 2016
    North America
    Hello all,

    I am planning out a robotics project that I would eventually like to use outdoors; and I am looking for any practical advice on how to prevent moisture buildup inside electronics cases.

    Normally, this sounds like a job for an ingress-protected box; but the real problem is humidity in ambient air. Under normal conditions, a simple sealed box would be sufficient. However it seems if the electronics inside the box are cycled on and off throughout the day, there is a change in internal air pressure that can draw moist air past any flaws in the seal, and into the box. If this cycle continues several times, condensation will form inside to ruin the components; and if you've ever seen auto headlamps with water trapped inside, this pretty much what I'm trying to avoid.

    I've seen a few vendors selling vent plugs that allow air though while blocking moisture and particles. So basically, my questions are: has anyone here tried the vent plug technique? Are these generally worth trying out? Are there any techniques you recommend?
  2. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

    Apr 17, 2007
    Loveland, CO USA
    >Mount the boards so water will run off. Not flat.
    >There is a spray coating to put on the PCBs.
    >If you have heat problems, put fans in the box. If you are moving the same old air around it helps. If the box is aluminum, heat will transfer from the electronics to the case just by moving the inside air around.

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