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Questions tagged [environmental-sealing]

For questions relating to the protection of electrical devices from hazards in their environment such as water, dust, vibration and mechanical impact.

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Can water condensation appear on PCB in IP67 enclosure box?

Does IP67 box protect PCB from moisture? If not, is it OK to have an outdoor air humidity sensor soldered on PCB in IP67 housing? Also if it doesn't block moisture, is there any reason to use IP65/...
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1answer
81 views

How to protect NTC thermistors for embedding in cement?

My kitchen at ground floor already has a floor (with floor heating) but it needs to be lifted by 3-5 mm with a very fine cement, on top of which tiles will be installed. I would like to embed a ...
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2answers
133 views

Does burying a cable shield it?

TL;DR: Does burying a cable provide shielding? I.e., is a shielded cable in air equivalent to an unshielded cable buried ~ 6 inches in soil? Long: I'm a technician at a university. I don't have ...
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0answers
501 views

Flammability of Silicone Sealants with Electronics

I'm aware that electronics grade silicone rubbers exist but I've also read in a particular post on here that common silicone rubber sealants can also be used for electronics, providing that they're ...
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1answer
556 views

What sealing type for cable/tube enter casing for outdoor use?

I build an electronic device which is used outdoors. A bundle of cables enter the device in a small 30mm diameter tube. This tube should be sealed so no dust/water/moisture enters the casing. It ...
4
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1answer
167 views

Bury LED in concrete outside, how to protect

I am wanting to place a 3mm LED and carbon resistor, outside between two paving stones. There is about a 4mm gap between pavers where the parts will be. The top of the Led will be flush with the top ...
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1answer
123 views

If my electronics are outdoors in a ventillated NEMA 4 enclosure, should I conformal coat my circuit boards?

I'm considering putting a circuit board in a ventilated NEMA 4 enclosure outdoors. I'm a little concerned about humidity and condensation inside the enclosure. Do I need to conformal coat my circuit ...
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1answer
971 views

Waterproof enclosures

I have a simple farm gate monitor which I'd like to put in a rugged waterproof enclosure to keep it dry enough to operate outside for approximately ten years with no maintenance other than the ...
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2answers
194 views

The role of humidity is BSOD and other glitches

For some unknown reason to me hearing aids require dehumidifying. The humidity somehow very significantly interferes with the microphones and other electronics. Daily dehumidifying stops the ...
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1answer
669 views

Effects of encasing bluetooth chip and rechargeable battery in an adhesive encapsulate?

I am thinking to encase my entire bluetooth PCB along and connected battery in an adhesive such as a soft urethane or silicone encapsulate. My board and battery are each about the size of two stacked ...
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1answer
5k views

Ozone and electronic equipment

Hopefully this is the right community to ask this question. Does anyone know whether there is a significant chance that ozone at approximately 15 ppm will damage consumer electronics, speakers, ...
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3answers
921 views

Temperature Sensor probe lifetime

Need a good 1 wire temperature sensor, there is a lot of information about the DS18B20, but I see nothing about it's quality or expected lifetime. I was wondering which is the expected lifetime of a ...
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3answers
855 views

High voltage sealant coating

What would be the best way to electrically insulate the high voltage (60-90V) area on a PCB? I've seen a silicon-like coating on several PCBs, but I am not familiar with the product or its application ...
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2answers
2k views

IC's in high altitude and low temperatures

What happens to IC's when trying to operate them in extremely harsh cold and high altitude environments like Mt Everest? Could you take any ordinary phone or computer up there an expect it to work? I ...
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4answers
6k views

Using an arduino in below-freezing temperatures

I intend to use an Arduino in an environment with highly variable weather. It will be an outdoor project staying outside during the entire year with temperatures ranging from a maximum high of ...
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1answer
421 views

How strong are the Arduino boards relating to interference robustness?

In my previous question the problem was related to EM noises with the Arduino boards, then I asked myself: How strong are the Arduino boards relating to interference robustness? For example, if I ...
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2answers
94 views

Is the risk of releasing toxic compounds into environment higher for older or newer electronic devices?

Electronic devices such as computers or laptops contains many toxic elements or compounds. While I'm sure for majority of them a care is taken so that they're not released into the environment of ...
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5answers
2k views

How can I seal a temperature sensor against water?

I have some DS18B20temperature sensors around and was wondering how can I seal them and use them in a water tank. The sensor must include a small resistance (140 k ...
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1answer
1k views

Experience with gel-filled junction boxes

A lost answer to one of my questions mentioned gel-filling junction boxes for moisture protection. Has anybody worked with this technique before? I am particularly interested in how difficult it is ...
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1answer
279 views

Weatherproofing coax connections

I have coax-connectors connecting two cable runs that are subject to weather. Typically weatherproofing is done by wrapping the connection in suitable tape. This is a fairly messy solution if the ...
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2answers
5k views

Low Budget Environmental Chamber - Product Testing

We have a product in which we are experiencing failures due to rain water (presumably) penetrating the case and dripping onto the circuit board. I believe we have the source of the leak identified and ...
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2answers
403 views

Possible to reliably run USB over a non-standard USB cable?

I'm planning on building a device for my car that sits somewhere in the rain tray or behind the dashboard. It will use automotive connectors so that things are sealed, easily connected and ...
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1answer
375 views

Protected USB connectors?

Do USB connectors come in protected versions suitable for damp, vibration prone environments? If so, what terms should I use when searching for them? If not, what are my options for meeting the USB ...
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2answers
773 views

Weather/environment sealed connectors, buttons? Sealing an LCD display at the edges?

Practical question: This controller will operate out in the field, at night, where dew (possibly rain too) is a reality. I need to run a few wires (up to 12 or so, maybe less) between controller and ...