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Seeking a cost effective IP67 Enclosure, without using O-Rings

e14 Contributor

I have a desire to install this in an orchard with harsh chemicals (pesticides, fertilizer) and get at least five years of useful life from the design.  Want to avoid O-rings, as they weather, and I don't know the chemical composition of all the pesticides and fertilizers used.  Need to withstand occasional water (it will be outside, in the rain, but not submersed).

 

PCB size can be flexible - the design is about 6 square inches in size.

 

Needs to be transparent to Bluetooth Low Energy internal antenna (IE, not EMI protection).

 

Thanks,

 

wjenning

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    The 7 in IP67 means that it can stand immersion in 1m of water.

    https://en.wikipedia.org/wiki/IP_Code

     

    This about right for rain - and I've never seen it done in an enclosure that can be opened up again without using O rings or squashy seals. If you smear the seal with silicone grease (not too thick but everywhere) it will seal better and gain some protection from whatever wets it. Choose  a box where the seal is protected by the plastic as much as possible and possibly use silicone rubber seals (but ideally you need some idea of the chemicals to choose the best seal material).

     

    Some metal boxes are sealed with cork gaskets but I've not seen this in  a plastic box.

     

    MK

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  • 0

    The 7 in IP67 means that it can stand immersion in 1m of water.

    https://en.wikipedia.org/wiki/IP_Code

     

    This about right for rain - and I've never seen it done in an enclosure that can be opened up again without using O rings or squashy seals. If you smear the seal with silicone grease (not too thick but everywhere) it will seal better and gain some protection from whatever wets it. Choose  a box where the seal is protected by the plastic as much as possible and possibly use silicone rubber seals (but ideally you need some idea of the chemicals to choose the best seal material).

     

    Some metal boxes are sealed with cork gaskets but I've not seen this in  a plastic box.

     

    MK

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