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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Lifetime of unprotected PCB outdoors

I'm designing a 40GHz RF system that will be operated outside for research. I prefer avoiding conformal coating and radomes to protect it due to cost, complexity, and loss. An alternative I'm ...
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3 answers
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Electronics in Diesel

I was wondering if there will be any adverse effect on electronics functionality-wise when it is dipped in diesel and operated. Since diesel is non-conductive, the functioning should not be affected. ...
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Environmental sealing of buzzers

If you have a buzzer mounted in an enclosure and you want to let sound get out freely, but prevent ingress of dust and water, are there standard techniques or solutions to this common electronics ...
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What keeps frying my RF switches?

Short version: What might be breaking the first sensitive component connected to an ungrounded 14cm UHF dipole antenna mounted 30' above the ground? Could it be related to static electricity? I have ...
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Help identify waterproof tactile button cap

I’ve been searching for a special kind of tactile button cap that mounts to a panel and effectively makes it splash-proof, while still allowing the button beneath to be used. I’ve seen it on ...
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IP6X sealing of PCB push buttons

I am currently designing a product that needs to be waterproof (IP67.) The product also requires some user interaction - basically at least one push-button and one LED. For the LED I am using these ...
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How to connect switches to PWB on IP69K sealed pannel without wiring harnesses while still allowing easy separation of board and panel?

I am working on a project that has a panel that has several push-buttons, and rocker-switches on it. The buttons/switches connect to a PWB that sits behind the panel. The buttons/switches/panel need ...
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2 votes
1 answer
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Can you identify this substance on PCB pads?

Can anyone identify what's going on on the PCB pads in the following photo? This is from an automobile ECU that had to be reprogrammed and so was opened and resealed a few days ago. Thermal (silver) ...
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21 votes
6 answers
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I'm TV technician, but I don’t know how to save or protect the boards in my workshop

I have main boards, power supplies, and so on as spare parts. But sometimes they spend several years in my workshop waiting for a customer. When I find the right customer, several times the boards ...
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  • 413
1 vote
2 answers
956 views

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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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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2 answers
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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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2 votes
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1k 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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7 votes
1 answer
594 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 ...
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  • 551
4 votes
1 answer
192 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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2 answers
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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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5 votes
1 answer
1k 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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2 answers
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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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4 votes
1 answer
1k 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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2 votes
1 answer
15k 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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0 votes
3 answers
1k 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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2 votes
3 answers
2k 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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5 votes
2 answers
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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3 votes
4 answers
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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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  • 131
-2 votes
1 answer
427 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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1 vote
2 answers
107 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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5 votes
5 answers
3k 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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  • 301
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1 answer
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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2 votes
1 answer
369 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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1 vote
2 answers
6k 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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  • 1,883
3 votes
2 answers
598 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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1 vote
1 answer
434 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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2 votes
2 answers
848 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 ...
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