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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Sealing flammability standard

I have a part which has 4 pins(2 of them power pins and rest is control pins). Should I use UL94 conformed sealing or sealant without flammability property is also OK? Max working current: 220mA, Max ...
Elentronics's user avatar
2 votes
1 answer
406 views

Going from PD3 (pollution degree 3) to PD2 using IP54 (ingress protection 54)?

I wonder what is needed to reduce a PD3 (pollution degree 3) environment to PD2? It seems that IP54 housing could do it, but I have not found this clearly written in text (there is some vague ...
warpi's user avatar
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Why are some relays not completely sealed?

Here are some of the pictures of PCB relays I found online. One may notice there are these opening/holes on the top or bottom of the package. What are the purposes of these 'air vents'?
FlakR's user avatar
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Help with component choice for weather proof sensor node

I'm planning on making a wireless weather station with a sensor node and a master to display the sensor data. The sensor node would be placed outside and measure temperature, humidity, and air ...
user294957's user avatar
1 vote
0 answers
181 views

PCB header pins sealing

I am looking to seal the bottom part of this PCB header because I do not want the pins underneath the connector to be exposed to the environment in which the board will be assembled: https://www.te....
InsaneMonkey's user avatar
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1 answer
123 views

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 ...
bob bob's user avatar
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3 answers
171 views

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. ...
aaditpj's user avatar
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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 ...
user57037's user avatar
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7 votes
2 answers
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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 ...
Barry Smith's user avatar
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92 views

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 ...
hekke's user avatar
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1 vote
1 answer
741 views

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 ...
c3ntry's user avatar
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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 ...
user4574's user avatar
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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) ...
A2max's user avatar
  • 29
21 votes
6 answers
4k views

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 ...
NIN's user avatar
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2 answers
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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/...
user3613833's user avatar
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1 answer
201 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 ...
FarO's user avatar
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1 vote
2 answers
233 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 ...
Keegan Smith's user avatar
2 votes
0 answers
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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 ...
Seano's user avatar
  • 163
7 votes
1 answer
610 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 ...
Flovdis's user avatar
  • 561
4 votes
1 answer
194 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 ...
rlb's user avatar
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2 votes
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 ...
Stephen Collings's user avatar
5 votes
2 answers
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 ...
Richard's user avatar
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2 answers
296 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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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 ...
Jet59black's user avatar
3 votes
1 answer
21k 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, ...
biggvsdiccvs's user avatar
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3 answers
2k 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 ...
jacktrades's user avatar
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 ...
joaocandre's user avatar
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 ...
knotseh's user avatar
  • 151
3 votes
4 answers
7k 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 ...
raphaeltm's user avatar
  • 131
-2 votes
1 answer
435 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 ...
user502052's user avatar
1 vote
2 answers
110 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 ...
Petr's user avatar
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5 votes
5 answers
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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 ...
otmezger's user avatar
  • 301
0 votes
1 answer
2k 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 ...
ARF's user avatar
  • 5,189
2 votes
1 answer
408 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 ...
ARF's user avatar
  • 5,189
2 votes
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 ...
Jason's user avatar
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3 votes
2 answers
675 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 ...
Toby Lawrence's user avatar
1 vote
1 answer
463 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 ...
Adam Davis's user avatar
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2 votes
2 answers
890 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 ...
Florin Andrei's user avatar