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tekmantechnology · 2 years

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A Guide for the Fundamentals of Helium Leak Testing

What is helium leak testing?

Helium leak testing is utilized to track down little holes or bigger breaks in greater volumes. The helium is utilized as a tracer gas and its fixation is estimated. This manual for helium leak testing ought to frame the essentials of utilizing this break testing strategy.

Why use helium for leak testing?

Helium is quite possibly of the littlest ga particles and is inactive. Being latent, helium is generally protected to utilize (as opposed to hydrogen) and won't respond with any of the materials inside the part to be tried. In most helium leak testing applications, a mass spectrometer is utilized to distinguish helium. Despite the fact that, utilizing a remaining gas analyser is likewise conceivable. Helium leak testing can for the most part be between 1,000 and multiple times more touchy than utilizing pressure rot methods.

What are the advantages of Helium Leak Testing?

Utilizing this strategy you can leak test to track down more modest breaks than with other test processes, utilizing a to a great extent temperature independant, dry method. This ought to bring about a more drawn out item life. There are 2 fundamental procedures; high vacuum testing which permits leak test limits to be put down as low as 1×10-12mbar.l.sec-1, or sniffing which is by and large utilized for helium leaks down to 1×10-6mbar.l.sec-1. For reference 1 cubic millimeter each second is roughly 1×10-3mbar.l.sec-1. or on the other hand 1cc is around 1mbar liter each second.

Most tests utilize promptly accessible Balloon Gas. Every so often, a genuinely unadulterated gas can be utilized. On a wellbeing note, if it's not too much trouble, recall that packaged helium contains no oxygen and is in this way an asphyxiant. It merits recollecting that leakage is a progression of liquid from a higher strain to a lower tension through a shortcoming in a gathering or made part.

The high vacuum method expects that the test volume to which the instrument is associated is at high vacuum, for example, under 3mbar outright strain. Could the part or gathering at any point endure this strain? Testing a section at high strain and high vacuum simultaneously is conceivable. You want to organize these tensions either side of the leaking limit. This might mean putting the part under test inside a release tight chamber.

It is feasible to have high vacuum associated with the Mass Spectrometer and a fractional vacuum in the part. This is valuable assuming you are attempting to test a 60 liter auto gas tank that can endure 150mbar tension. One simply empties both inside and outside, then refills to 150mbar outright tension.

While testing utilizing helium, it is feasible to flood the mass spectrometer with helium in the event that there is a huge hole. In many examples, where there are numerous minutes between each test, this isn't an issue, one simply trusts that the instrument will tidy itself up. On the other hand, and in higher throughput frameworks, one could likewise pre-test utilizing pressure rot to screen out bigger leakers prior to presenting helium that could flood the mass spectrometer.

One can likewise either sniff or shower helium. Helium Sniffing is utilized where the part can be compressed above barometrical and a helium sniffer firearm is physically situated round the part. Splashing is where the part can be cleared and helium is physically showered over the beyond the part.

Foundation Helium Concentration

Helium can and will get all over the place if possible. It gets very troublesome in some cases to figure out where the helium is coming from. There is around 5 ppm Helium in the air. Assuming the part under test is loaded up with helium the test genuinely should charge is eliminated appropriately and not simply delivered into the quick region. For only a couple of tests, the helium can be weakened in the quick region. For more successive testing, this might mean funneling the removed test gas away to the beyond the structure on the downwind side and well obvious from entryways or windows that could permit it back in.

To find helium releases one typically either splashes or sniffs, the last option being the standard in high volume testing. While utilizing a helium sniffer, one beginnings with 5 ppm foundation focus in surrounding air and would typically hope to distinguish an increment of a further 5 ppm.

One can involve this perceptible ascent in helium fixation to test parts inside a cover where the test pressure is at or close to barometrical tension, this is usually known as gathering testing. By coursing the air inside the cover and passing it by a mass spectrometer in sniffing mode, you can set a caution limit at say 8ppm. Again it is critical to flush or concentrate away any tainted air once the test has finished. Notwithstanding, this interaction can set aside some margin for bigger parts.

Helium leak testing at Lower Limits

While testing at 1 x10-9 and underneath, one might have to do extra things to have the option to finish a practical test. One might have to cleanse away any sticking helium passed on in the part to be tried or the test chamber. For instance, with the chamber and part open to climate before the test, they are presented to a helium centralization of 5 ppm. The helium can stick to different surfaces and influence the aftereffects of the test. In this way, one might have to "wash" away any gripping helium in the chamber and part in a gas containing no helium.

The grouping may be:

1. Evacuate both the part and chamber

2. Back fill the test volume with affirmed clean dry nitrogen

3. Re-clear

4. Fill the part with the test gas

Helium leak testing at high creation rates

At the point when high volume creation requires high vacuum, you should likewise consider the time brought to siphon down to the expected degree of vacuum, this can be critical. At higher creation rates, having a lot more limited chance to test a section, enormous leakers might be an issue. The flooding of the break test instrument with helium might require a few minutes for the helium to lessen to a level where testing can recommence. To lessen the impact of an enormous leaker one can; move toward the full test tension in stages, move toward the full focus, flush the mass spec with a gas with no helium present or pre-screen utilizing an air rot procedure before helium testing. Air rot pre-screening will permit known bigger breaks to be to be eliminated preceding helium leak testing.

While testing at fast it is essential to diminish the test time to its base. To do this one might need to utilize various methods to; decrease the test volume (by infilling voids and guaranteeing least line run volumes), nitrogen flush, and so on. Obviously at high velocity the programmed treatment of the item and programmed association have an enormous impact.

Helium Bombing for testing airtight fixed compartments

While attempting to test airtight fixed compartments, it would be great to attempt to embed some perceptible helium in the gathering system preceding the last seal being made. In the event that presenting helium inside the part is unimaginable, one can attempt to drive helium into the gadget utilizing a strategy called besieging.

Helium besieging and helium leak testing tooling.

Helium besieging is accomplished through driving a break by compressing the gadget inside a helium gas chamber. Regularly, the chamber is first cleared to eliminate barometric strain air from round the parts and afterward compressing with packaged expand gas.

The gadget is then absorbed the compressed helium to compel helium into the possibly leaking part. Then the chamber is then vented and the parts removed from the chamber.

The parts are then tried with a mix of a gross hole test, to guarantee that there is certainly not a major break, and afterward a high vacuum helium leak test in an encased chamber utilizing a helium mass spectrometer.

Tooling and Pipework

On the off chance that one is expecting to helium leak test a section; it is vital to take note of that the tooling and pipework used to make the test volume and helium gas supply should be release tight to a more significant level than the hole test limit. This implies that cautious designing of the seals is vital, especially where muddled seals are required, like right calculated seals for 2 opposite faces. One must likewise utilize helium release tight valves and pipework and give specific consideration to the estimating of the vacuum pipework.

Helium Mixing, Helium Re-use and Helium Recovery

The amount of helium might become huge while testing enormous volumes, at higher tensions or potentially at high velocity. There are various procedures to decrease the utilization of the helium gas.

First of these is to blend the helium in with another cheaper gas, either nitrogen or packed air. Here the responsiveness of the test isn't undermined by the blending system.

The second of these is to re-utilize the helium from one test by extricating it from the gadget and afterward driving it into the following gadget. This can frequently be executed by a blend of a vacuum siphon and straightforward air chamber game plan in the event that the volume isn't excessively huge. The centralization of the helium can be observed between cycles utilizing a mass spectrometer or another sensor. In the event that the focus falls under a satisfactory level, the helium ought to be taken out and another charge of helium is utilized.

The third method is helium recuperation. The helium is removed into a middle holding vessel to then be compacted back to high strain to recuperate the helium.

Also Checkout: Helium Leak Testing Services

#Helium Leak Testing Services #helium leak testing

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centralheatingleakdetection · 4 years

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ADI Central Heating Leak Detection

Are you concerned that your central heating may have a leak but just aren’t sure? You are fairly certain that your central heating has an issue since you find yourself regularly topping up the boiler’s pressure but you just have no means to pinpoint the precise site of the leak? You definitely have a huge problem on your hands, as a leak will definitely not fix itself up. What’s worse is the longer you put off having the leak traced and subsequently fixed, the more damage your property can potentially suffer, leading to expensive repair costs.

There’s really no need to get all stressed out, worrying about this leak and all the mess it is causing. Just be grateful to know that it is totally unnecessary to shatter all the floorboards and dig up the ground to uncover the leak. When it comes to problems like this, you should not hesitate to contact the professionals and let ADI Central Heating Leak Detection find a solution to this.

Widely praised for being the original leak detection company in the United Kingdom, centralheatingleakdetection.co.uk has earned a great reputation in the industry for its know-how, the vast experience of its engineers, sheer commitment to customer satisfaction and its usage of top-shelf equipment, some of which have been worked on in house by the company’s head engineer, Adrian Morgan. This equipment is used in tandem with reliable commercial leak detection tools that can assist our engineers in finding the exact location of the leak. This means meticulousness and high-quality work sans the unnecessary expense and effort that comes with destroying floorboards, digging up the ground or cutting into walls just to try and follow up on an unconfirmed hunch.

ADI Central Heating Leak Detection is so enthusiastic on giving customers the best experience possible that it has made it a longstanding policy to give one job every day to each engineer on its staff. This is a critical scheme since it means that our engineers do not have to think about scuttling to complete one task so that he or she can move on to next. When one of our ADI Central Heating Leak Detection engineers gets to your location, it means that you will get concerted effort and efficiency to get your leak located and mended.

Since ADI Central Heating Leak Detection was launched over 10 years ago in 2009, it has conferred with consumers from all corners of the region and from all walks of life. Most have voiced out their fear of the unknown and the unease that comes with not knowing the seriousness of the damage the leak is causing to their domain. With ADI Central Heating Leak Detection, that fear can be purged in just a day as we work to identify and then, repair that leak in just a day.

So you might be wondering: how does ADI Central Heating Leak Detection locate the origin of the leak? While rival companies might go on gut feel in pinpointing the location of the leak, ADI Central Heating Leak Detection relies on recognised, confirmed and trustworthy measures. Finding the precise location of the leak of a heating system is an onerous and sometimes, troublesome job. Since not all houses are made of the same materials, not every tool in an engineer’s toolkit can duly determine the source of the leak. At this point, some plumbers try to speculate where the leak is. However, this has ugly consequences as you might end up taking totally ineffective steps like breaking the floorboards or drilling into a wall without an assurance that the leak will even be located. At ADI Central Heating Leak Detection, the engineers take a more conscientious style to finding the leak. This means utilising a wide array of devices and apparatus to track the leak’s source with absolute precision. And since our engineers will be working on just one assignment each day, ADI Central Heating Leak Detection can really take its time in making sure of the leak’s location to move forward in finally patching up the leak.

ADI Central Heating Leak Detection utilises four distinct tools to pinpoint the location of the leak in your central heating system. These are:

Thermal Imaging Cameras

ADI Central Heating Leak Detection has spared no expense in getting the best thermal imaging cameras in the market. Our engineers turn to these devices to exhaustively search for and successfully identify any damp or warm patches in your property's walls or floor. By tracing the path of the water, our engineers can then locate the leak’s source. Our devices can probe through any kind of surface, thus removing the need for needless speculation.

Acoustic Listening Devices

ADI Central Heating Leak Detection also has high-tech listening gadgets that let our engineers listen and locate the places of both internal and external leaks. These complex, ultrasonic gadgets allows our engineers to listen in on leaks that go as deep as 2.5 metres beneath the surface, which means there is no need to dig up the floor to find where the leak is.

Tracer Gases

ADI Central Heating Leak Detection acknowledges that not all leaks are made of gigantic holes, which means tools like a thermal camera or an acoustic listening device might not be the most suitable gadget to use for these kinds of situations. Customers have nothing to worry about though, as ADI Central Heating Leak Detection is trained to know how to respond to every scenario. In this case, our engineers turn to tracer gases, which is a safe combination of hydrogen and nitrogen that is placed into your pipework. Because the gas molecules are smaller and lighter than water molecules, they rise to the top, similar to bubbles in a soda. These gases can then trace even the most minute of water leaks, succeeding where most conventional methods would usually fail. We then use gas sniffers to isolate the location of the leaks.

Leak Correlators

Electric pulses are the secret behind leak correlators. These are ideal for underground pipes of up to 600 metres in length. Much like the speed guns that police officers use, the electric pulses send back information to our engineer, who can immediately narrow down the leak's position. We use leak correlators to determine leaks that are on large external areas like farms, private roads, and even airports.

#central heating leak detection

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eretzyisrael · 5 years

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In my final positive Israel newsletter of Jewish Year 5779, the many recent Israeli successes include US approval for seven medical innovations, medics saving lives, Jews & Arabs working together, the best startup, Israel's baseball team, a world champion gymnast, prizes for Zionism, water innovation, and even for the best sniffer dog. I hope to report even greater Israeli successes in 5780. During the Jewish festival season I will be publishing newsletters every two weeks. The next newsletter will hopefully be issued on Sun 13th Oct. Wishing a Shana Tova U'metuka / A Very Good and Sweet New Year to all who celebrate it.

Good News From Israel

In the 29th Sep 19 edition of Israel’s good news, the highlights include:

US approval has just been given to seven Israeli medical devices and treatments.

The first Israeli woman to command an IAF squadron.

Another 8 Rwandan children are flown to Israel for free heart surgery.

An Israeli startup is now splitting water to produce hydrogen.

Amazon now offers local delivery to Israel.

Israel won the baseball playoffs to compete in the Olympics.

Happy New Year from the Jewish State.

Read More: Good News From Israel

#Israel #agriculture #Arabs #baseball #coral #diabetes #drones #Druze #Hava Nagila #heart #hydrogen #infusion #lung #Mars #Olympics #Palestinians #Rosh Hashannah #water

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sussex-nature-lover · 3 years

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Friday 22nd January 2021

Musings from under the duvet

Today’s Photos which are not my own are sourced via Twitter

If you were at all interested in my sojourn in Anglo Saxon history and the Sutton Hoo find, behold, there’s more. I won’t go into it but you can find all the information Here from Staffordshire. If you weren’t as fascinated as I am, let’s move on.

We didn’t have such an early a start as the Test Match Special team, who were on air from 04.15 but we were awake early enough and listening to the cricket from Galle again. The commentary team are all in different locations - Salford, The Oval (London) and their own homes. First comment of note, apart from the three early wickets, was a fox seen wandering right across the ground at The Oval

You can’t make them out all that well here but the grass is also covered with gulls and starlings.

Looking out at our own frosty garden we have absolutely loads of Rooks with some Crows and Jackdaws - they’re the noisy neighbours from the woods. I think I said before we’re in for a busy Spring with constant cries of rate my baby again. It’s a few years now and I think their community is going from strength to strength. Roll on leaves on those trees please.

An altogether different bird has flown here via the Royal Mail. I’m not totally sure what it is? some kind of Swallow I imagine, so it’s come early. Lovely though.

Thank you Ms NW tE x

I have to say it’s very pleasant lying in bed warm and snug, with a mug of hot tea, listening to the cricket, reading and looking out of the window. My it’s been a cold and very frosty start to the day and there was a very strange cloud this morning too. I’d better consult the book and see what that’s all about. It’s also notable that we haven’t needed a bedside lamp on today either, so that’s a pleasant change.

I was actually reading up on some recipes, aubergine (egg plant) recipes to be precise. I’ll be making this soon. But looking around lead my mind to wondering why I dislike coriander (cilantro) so much? I’ve read up on it before as I absolutely hate and detest the flavour so much that my mouth is actually shrivelling and I’m recoiling at the very thought. Crow can tolerate it, but isn’t particularly keen. Now the odd thing is, for me, it’s only raw coriander that brings about this extreme reaction. When the herb’s cooked into a dish it’s not quite so bad, when it’s used as the dried seeds or ground spice, which I use frequently in Indian dishes, then I’m ok with it - as a garnish, undetected in a salad or salsa it completely ruins my food. Usually I’m quite a fan of leafy green herbs.

So off I went again on another internet search

“It may surprise you to learn that those who dislike cilantro tend to have a gene that detects the aldehyde part of cilantro as a soapy smell and taste,” Dr. Vyas says.

Aldehydes are organic materials that possess a distinct chemical structure. The pairing of a carbon atom with an oxygen atom leaves room for two more bonds. If one of those bonds is with a hydrogen atom it’s called an aldehyde. If neither of the bonds is with hydrogen, it becomes a ketone.

The difference may be small at the molecular level, but has large implications at the olfactory (smell) level. It’s suspected that a dislike for cilantro is largely driven by the smell (and smell is directly linked to how we taste.)

“Think back to grade school science lab and formaldehyde and you can see why some people have such a negative reaction to aldehydes,” she says.

I’d looked up why I dislike the herb before, especially after finding out there are whole websites and an International Day (February) devoted to these feelings. I began to speculate whether I could eat it if I held my nose? but that article goes on...

On the flip side, one of the most famous perfumes ever invented uses synthetic aldehydes in high volumes. Chanel No. 5, a very distinct and popular perfume, contains a number of synthetic aldehydes to deliberately gear up your olfactory system.

Blame it on your genes — and your surroundings

Some people possess a gene that makes them super-sensitive to the aldehyde component found in cilantro and other foods and products. One study noted a very specific genetic link near the olfactory center of DNA in about 10% of those with cilantro aversion.

What’s even more interesting, according to the study, women are more likely to detect a soapy taste and dislike cilantro. And African-Americans, Latinos, East Asians and South Asians are significantly less likely to detect a soapy taste when compared with Europeans. Source

See I find that really strange because I’ve worn Chanel No 5 perfume for years and love it.

Chanel No 5:

A highly complex blend of aldehydes and florals - including rose, ylang-ylang, jasmine, lily of the valley and iris - layered over a warm, woody base of vetiver, sandalwood, vanilla, amber and patchouli

Coriander is just one food that may drastically differ in taste depending on your genetic make-up. What we taste when we eat broccoli for example, can also be determined by the receptors we were born with.

‘Somebody may have a great aversion to broccoli because they have the bitter taste receptors that are responsive to a specific compound in broccoli. Whereas other people don’t have that receptor variant and, therefore, don’t experience the bitterness from broccoli,’ explains Prof. Keast.

Strange again, my sense of taste favours Umami, bitter and sour, I like salty too, but not too fond of sweet. The very smell of broccoli makes me heave and gulp, so I don’t doubt that olfactory senses play a large part in the dislike, but the explanation about coriander isn’t stacking up for me.

Anyway, the upshot of all that is that any dish which calls for raw coriander has flat leaf parsley substituted and I can’t see that changing. The topic was a bit of a diversion though and topical given that a loss of smell and taste are symptoms of the Covid-19 virus. Crow thinks I’m the in-house sniffer dog whereas his senses aren’t particularly well developed and indeed his late father lost both of those senses through illness and it did prove both unpleasant and potentially dangerous at times.

As a change away from my culinary and sensory investigations I saw our old stamping ground on Twitter. Like so many others, the Reserve has had to close due to the weather.

Burton Mere I had a little browse of their website and the photo on that link made me smile. I also saw they’re featured in Nature’s Home magazine.

Going back to the photo (which you’ll have to click through to see) it reminded me how little we’ve seen of squirrels in the garden these past few months. At one time there were about eight who were the absolute scourge of our bird seed and feeders. The same goes for rabbits, who are also mainly sticking close to the woods at the bottom of the garden, although there were some up by the house after dusk the other night.

spot the odd one out

Throw-back photos from the garden

Butler (above) and The Twins (below)

I kind of miss watching them, but it’s very much a case of be careful what you wish for.

What Did I Learn Yesterday?

Ever sung the words “ I see a little silhouetto of a man, Scaramouche, Scaramouche, will you do the Fandango? “

Well I knew that the fandango is a dance but I always assumed a scaramouche was some form of devil figure, but no, well, kind of (as per the skirmisher) the proper definition is

Scaramouche or Scaramouch (from Italian scaramuccia, literally "little skirmisher") is a stock clown character of the 16th-century commedia dell'arte (comic theatrical arts of Italian literature)

Bohemian Rhapsody, Queen

#naturephotography clouds birds squirrels rabbits wildlife senses taste smell coriander cilantro

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brandon-emm-blog · 5 years

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Session2-Cybernetics and the Future of Humanity(post1)

The emergence of bionic technology is not only a technological innovation, but also has a higher significance than the actual existence. It provides more reliability, practicability and safety for people's life and survival, from fireflies to artificial cold light. Electric fish and volt batteries, from bats to ultrasonic locators [1], bionic technology has given us too many surprises. Below we will discuss two examples of bionic technology.

Bionic technology is spread across all fields, even within the body itself, such as blood vessels. Blood vessels are scattered throughout the body, and blood circulates through blood vessels to maintain human life. If the blood vessels are broken, the blood seeps from the blood vessels to form a bleeding phenomenon. Sometimes, some large blood vessels are necrotic, embolized or severely ruptured. It is necessary to cut off a section of blood vessels and replace them with a "artificial blood vessel" of the same length and thickness. Can "artificial blood vessels" replace the blood vessels in the human body?

At first, according to the function of the human body, the scientists selected animal protein fiber silk as raw material, and firstly weaved a fine and tight tubular silk fabric on a delicate loom, and then mechanically folded and resin processed to make the tubular wire. The fabric has strong toughness and elasticity, and has flexibility. It can be bent freely, does not fold, does not break, and does not leak, does not leak water, blood passes through it, and does not change. Finally, the strictly sterilized artificial blood vessels can be used inside the human body instead of real blood vessels.

Today, people can not only use synthetic polymer materials to make blood vessels, but also use them to make artificial hearts, artificial airways, artificial noses, artificial bones, artificial skin, artificial muscles, and so on. Except for the brain, stomach and some endocrine organs, almost all organs of the human body can be made of polymer materials.

Most of our bionics in our cognition come from simulating the way animals behave, but there are also mechanical imitations of humans, such as smoke alarms. Once a fire occurs, the smoke alarm will automatically sound an alarm. Some families have installed a gas (or liquefied gas) olfactory alarm in the kitchen. Once a flammable gas leaks, the scent sensor has sensed and alerted when the person's nose has not been detected. How do these scent-sensitive alarm devices consisting of electronic components sniff out flue gas and other flammable gases?

It turns out that this "electric nose" with olfactory function is made of a "gas-sensitive resistor material". Initially, when scientists studied the semiconducting properties of oxide ceramics, they found that when some impurities were added, their electrical resistance would change with the composition of the surrounding gas. If you make it into a probe, you can measure what gas is in the surrounding environment based on the change in its resistance. A component like this is called a “gas varistor”. For example, a composite gas-sensitive resistor containing an oxide such as tin oxide may have a significant change in conductivity when it encounters carbon monoxide or smoke; a gas-sensitive resistive element containing iron oxide or zinc oxide is treated with butane or propane. The main component of liquefied gas and natural gas with methane as the main component are very sensitive. A variety of different sniffer-sensitive resistive elements, through their changes in electrical conductivity, can "sniff" and distinguish gases that cannot be identified or perceived by many types of human noses, such as hydrogen, carbon monoxide, nitrogen oxides, ammonia, methane, ethylene, Benzene, Freon, etc. [2].

[1] Anon, (2019). [online] Available at: https://baijiahao.baidu.com/s?id=1607836850405698477&wfr=spider&for=pc

[2] Anon, (2018). [online] Available at: https://zhidao.baidu.com/question/589048915074729765.html

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savetopnow · 6 years

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2018-04-04 21 TECH now

TECH

Ars Techica

YouTube shooter IDed as woman angry at site’s “age-restricted” policies

Apple has hired Google’s head of search and artificial intelligence

Panera accused security researcher of “scam” when he reported a major flaw

Two founders of cryptocurrency offering arrested, charged with fraud

Google bans cryptomining Chrome extensions because they refuse to play by the rules

Buzzfeed Tech

Today’s Shooting Showed How Bad Twitter’s Misinformation Problem Is

This Country Said It Would Punish Journalists For Writing Fake News But Changed Its Mind

Grindr Is Letting Other Companies See User HIV Status And Location Data

Chick-Fil-A Will Soon Be Bigger Than Taco Bell, Burger King, And Wendy's

Sen. Ed Markey Says "Congress Must Act" When Facebook Fails To Maintain Safety On Its Platform

CNet

Google Doodle celebrates Maya Angelou - CNET

YouTube HQ shooter identified video - CNET

Facebook now lets you delete third-party apps in bulk - CNET

Sandbox VR's haptic vest lets you feel every zombie scratch - CNET

This bike sharing company just got bought for $2.7 billion - CNET

Clean Technica

11 US States To Challenge EPA Rollback Of 2025 Fuel-Efficiency Standards

Tesla Model 3 — Cash Cow When Tesla Needs It Most

Tesla Begins Rolling Out Solar Roof Tile Installations In California

WB Mason Receives Ryder-Managed Fleet Of Workhorse E-GEN Electric Vans

California Gets 33rd Hydrogen Fuel Cell Car Refueling Station — Why The Slow Pace Of Infrastructure Development?

Hacker News

Hacking a $30 IoT camera to do more than it’s worth

Trump’s Campaign Said It Was Better at Facebook. Facebook Agrees

Smarking (YC W15) Is Hiring Senior Front End Engineer in SF

SteamOS, Linux, and Steam Machines

Beep security update

Mashable

Battered by tourists, the Thai beach from 'The Beach' to close temporarily

Qantas using its cargo hold for sleep and exercise? It's one of many wild ideas

Bumble counters Tinder's parent company lawsuit on patent infringement

Massive solar power project will be 100 times larger than any in the world

New Zealand's privacy commissioner is also done with Facebook

Motherboard

David Hogg Thinks His Conspiracy Theorist Trolls Are Full of Shit

A Note About 'Shenzhen's Homegrown Cyborg'

Facebook Deletes Hundreds of Accounts Controlled By Russian Propagandists

San Bruno Police Are Responding to a Shooting at YouTube HQ

The World’s Fastest Commercial Drone Will Drop Blood on the US This Year

New York Times Technology

Executive Who Sold Self-Driving Truck Start-Up to Uber Departs

A Quick Online Divorce for $60? Not So Fast, Denmark Says

Police Identify Woman Who Wounded 3 at YouTube and Killed Herself; Motive Is Unclear

Spotify’s Wall Street Debut Is a Success

Grindr Sets Off Privacy Firestorm After Sharing Users’ H.I.V.-Status Data

Recode

Full transcript: Lauren Goode on her final Too Embarrassed to Ask

Here’s YouTube CEO Susan Wojcicki talking about controversial monetization changes on the platform

As women in tech gain experience, their pay gap with men gets worse

Four people have been shot at YouTube HQ in Silicon Valley

At $27 billion, Spotify is the seventh-most-valuable internet company to go public in the U.S.

Reddit Technology

Adobe's AI will automatically color-match shots in Premiere

FCC Commissioner Slams Her Own Agency for Policies 'Custom-Built' to Favor Sinclair-Tribune Merger

For the first time, the U.S. government has publicly acknowledged the existence in Washington of what appear to be rogue devices that foreign spies and criminals could be using to track individual cellphones and intercept calls and messages

Amazon patent reveals 'voice sniffer algorithm' that could analyze conversations

A radical proposal to keep your personal data safe | Stop surveillance before it even asks for consent

Reuters Technology

Apple Pay arrives in Brazil, partnering with Itaú Unibanco

Russia's IBS launches IPO on Moscow Exchange

Woman wounds three at YouTube headquarters in California, then kills herself

Denmark hits 1,200 former Uber drivers with additional tax

China's Meituan Dianping acquires bike-sharing firm Mobike for $2.7 billion

Slashdot

Latest macOS Update Disables DisplayLink, Rendering Thousands of Monitors Dead

NASA Hires Lockheed Martin To Build Quiet Supersonic X-Plane

Swedes Turn Against Cashlessness

YouTube Shooter 'Nasim Aghdam' Reportedly Had Website With Manifesto That Targeted YouTube For Censorship, Demonetization

Schools Won't Like How Difficult the New iPad Is To Repair

TechCrunch

Facebook to exclude US users from some privacy enhancements

Google’s latest undersea cable project will connect Japan to Australia

1Password replaces Teams Pro with new business plan

500 Startups takes strategic investment from Abu Dhabi Financial Group

This new venture fund has more than $180 million to invest in interactive entertainment startups

The Next Web

Huawei’s Honor hints at releasing a new AI-tinged phone in May

March in Africa: Uber on motorcycles, Spotify’s arrival, and solar panels

If Facebook cared about us at all, it would adopt EU privacy standards globally

Apple snaps up Google’s AI chief to fix Siri

Facebook confirms: Donald trumped Hillary on the social network during 2016 election

The Verge

OnePlus will let users hide the notch on the OnePlus 6

Google will no longer accept Chrome extensions that mine cryptocurrency

Alexa now lets you play music with smart home Routines

OnePlus CEO confirms key OnePlus 6 specs

Apple hires Google’s former AI boss to help improve Siri

WSJ Tech

Three Wounded, Suspect Dead in Shooting at YouTube Headquarters

Apple Hires Artificial-Intelligence Executive From Rival Google

AI Could Soon Enhance Real-Time Police Surveillance

Tesla Misses Model 3 Production Goal but Shows Progress

Spotify's Splashy Debut Pressures Banks

Wired

The Politics of ‘Black Panther’ Are What Make It Great

You Know, for Kids

The Life Issue

‘The Sky Is Yours’ Combines Dragons and YouTube

The Uber Crash

#tech

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taios-blog · 4 years

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Pfeiffer Vacuum launches new helium and hydrogen sniffer leak detector - https://ift.tt/3d5XpPo

from TAIOS - technology all in one services https://ift.tt/2GmzWuT via IFTTT

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portableleakdetectors-blog · 6 years

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Portable Leak Detectors is your one stop destination for effective leak detecting devices. We offer a wide range of handheld portable battery operated leak detectors online. We have large stock of leak detectors ready to be shipped immediately. These leak detectors are highly effective in detecting \helium gas leaks along with hydrogen, forming gas (5% hydrogen, 95% nitrogen) and argon leaks. Find the best portable leak detectors for detecting gas like hydrogen, forming gas (5% hydrogen, 95% nitrogen) & argon. Easy to use Handheld Leak Detectors!

#Helium Leak Standards #Ion Science Gas Check #Underground Helium Sniffer

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tekmantechnology · 2 years

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Guide to the Fundamentals of Helium Leak Testing

What is helium leak testing?

Helium leak testing is utilized to track down little holes or bigger breaks in greater volumes. The helium is utilized as a tracer gas and its focus is estimated. This manual for helium leak testing ought to frame the rudiments of utilizing this break testing technique.

Why use helium for leak testing?

Helium is perhaps of the littlest gas atoms and is latent. Being latent, helium is moderately protected to utilize (instead of hydrogen) and won't respond with any of the materials inside the part to be tried. In most helium leak testing applications, a mass spectrometer is utilized to recognize helium. Even though utilizing a remaining gas analyzer is likewise conceivable. Helium leak testing can for the most part be between 1,000 and multiple times more touchy than utilizing pressure rot procedures.

What are the advantages of Helium Leak Testing?

Utilizing this strategy you can leak test to track down more modest breaks than with other test processes, utilizing a generally temperature-independent dry procedure. This ought to bring about a more extended item life. There are 2 fundamental strategies; high vacuum testing which permits leak test limits to be put down as low as 1×10-12bar.l.sec-1, or sniffing which is for the most part utilized for helium leaks down to 1×10-6mbar.l.sec-1. For reference 1 cubic millimeter each second is roughly 1×10-3mbar.l.sec-1. or on the other hand, 1cc is around 1bar liter each second.

Most tests utilize promptly accessible Balloon Gas. Every once in a while, a genuinely unadulterated gas can be utilized. On a security note, kindly recall that packaged helium contains no oxygen and is hence an asphyxiant. It merits recalling that leakage is a progression of liquid from a higher strain to a lower tension through a shortcoming in a gathering or fabricated part.

The high vacuum strategy expects that the test volume to which the instrument is associated is at high vacuum, for example, under 3bar outright strain. Might the part or get together at any point endure this strain? Testing a section at high strain and high vacuum simultaneously is conceivable. You want to orchestrate these tensions on either side of the leaking limit. This might mean putting the part under test inside a release-tight chamber.

It is feasible to have a high vacuum associated with the Mass Spectrometer and a fractional vacuum in the part. This is valuable assuming you are attempting to test a 60-liter auto gas tank that can endure 150lulumbar strain. One simply empties both inside and outside, then inlays to 150bar outright strain.

While testing utilizing helium, it is feasible to flood the mass spectrometer with helium if there is a huge hole. In many examples, where there are numerous minutes between each test, this isn't an issue, one simply trusts that the instrument will tidy itself up. On the other hand, and in higher throughput frameworks, one could likewise pre-test utilizing pressure rot to screen out bigger leakers before presenting helium that could flood the mass spectrometer.

One can likewise either sniff or splash helium. Helium Sniffing is utilized where the part can be compressed above barometrical and a helium sniffer firearm is physically situated around the part. Showering is where the part can be cleared and helium is physically splashed over the beyond the part.

Foundation Helium Concentration

Helium can and will get all over if possible. It gets very troublesome in some cases to figure out where the helium is coming from. There is roughly 5 ppm Helium in the environment. Assuming the part under test is loaded up with helium the test must charge is taken out appropriately and not simply delivered into the prompt region. For only a couple of tests, the helium can be weakened in the prompt region. For more regular testing, this might mean channeling the separated test gas away to beyond the structure on the downwind side and well obvious from entryways or windows that could permit it back in.

To find helium releases one generally either splashes or sniffs, the last option being the standard in high volume testing. While utilizing a helium sniffer, one begbeginningth a 5 ppm foundation fixation in encompassing air and would as a rule hope to distinguish an increment of a further 5 ppm.

One can involve this recognizable ascent in helium fixation to test parts inside a cover where the test pressure is at or close to climatic strain, this is regularly known as collection testing. By coursing the air inside the cover and passing it by a mass spectrometer in sniffing mode, you can set a caution limit at say 8ppm. Again it is essential to flush or concentrate away any defiled air once the test has finished. Notwithstanding, this interaction can set aside some margin for bigger parts.

Helium leak testing at Lower Limits

While testing at 1 x10-9 and underneath, one might have to do extra things to have the option to finish a practical test. One might have to cleanse away any sticking helium passed on in the part to be tried or the test chamber. For instance, with the chamber and part open to the climate before the test, they are presented to a helium centralization of 5 ppm. The helium can stick to different surfaces and influence the aftereffects of the test. In this way, one might have to "wash" away any gripping helium in the chamber and part in a gas containing no helium.

The grouping may be:

1. Evacuate both the part and chamber

2. Backfill the test volume with guaranteed clean dry nitrogen

3. Re-clear

4. Fill the part with the test gas

Helium leak testing at high creation rates

At the point when high volume creation requires a high vacuum, you should likewise consider the time brought to siphon down to the necessary degree of vacuum, this can be huge. At higher creation rates, having a lot more limited chance to test a section, huge leakers might be an issue. The flooding of the break test instrument with helium might require a few minutes for the helium to lessen to a level where testing can recommence. To lessen the impact of a huge leaker one can; move toward the full test strain in stages, move toward the full fixation, flush the mass spec with gas with no helium present, or pre-screen utilizing an air rot procedure before helium testing. Air rot pre-screening will permit known bigger holes to be taken out preceding helium leak testing.

While testing fast it is vital to decrease the test time to its base. To do this one might need to utilize various procedures to; lessen the test volume (by infilling voids and guaranteeing the least line run volumes), nitrogen flush, and so on. Obviously at rapid, the programmed treatment of the item and programmed association have a huge influence.

Helium Bombing for testing airtight fixed holders

While attempting to test airtight fixed compartments, it would be great to attempt to embed some perceivable helium in the gathering system preceding the last seal being made. If presenting helium inside the part is preposterous, one can attempt to drive helium into the gadget utilizing a procedure called besieging.

Helium besieging and helium leak testing tooling.

Helium besieging is accomplished by compelling a hole by compressing the gadget inside a helium gas chamber. Regularly, the chamber is first emptied to eliminate barometric tension air from round the parts and afterward compressed with packaged expand gas.

The gadget is then absorbed by compressed helium to drive helium into the possible leaking part. Then, at that point, the chamber is then vented and the parts removed from the chamber.

Tooling and Pipework

On the off chance that one is meaning to helium leak test a section; it is essential to take note that the tooling and pipework used to make the test volume and helium gas supply should be released tight to a more significant level than the hole test edge. This implies that cautious designing of the seals is fundamental, especially where muddled seals are required, like right calculated seals for 2 opposite faces. One must likewise utilize helium release tight valves and pipework and give specific consideration to the measuring of the vacuum pipework.

Helium Mixing, Helium Re-use, and Helium Recovery

The amount of them might become critical while testing huge volumes, at higher tension, and additionally at high velocity. There are various methods to decrease the utilization of helium gas.

First blend the helium in with another cheaper gas, either nitrogen or compacted air. Here the responsiveness of the test isn't undermined by the blending system.

The second of these is to re-utilize the helium from one test by separating it from the gadget and afterward driving it into the following gadget. This can frequently be carried out by a blend of a vacuum siphon and a basic air chamber plan if the volume isn't excessively enormous. The grouping of the helium can be checked between cycles utilizing a mass spectrometer or another sensor. If the fixation falls under an OK level, the helium ought to be eliminated and another charge of helium is utilized.

The third method is helium recuperation. The helium is extricated into the middle of the road holding the mid-middle-of-the-roadster back to high strain to recuperate the helium.

#Helium leak testing

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endtimeheadlines · 6 years

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US deploys “Nuke Sniffer” as North Korea may be on verge of detonating bomb

North Korea may be about to detonate a nuclear bomb as the US has deployed its “nuke sniffer” spy plane. Nuclear explosion tracker Constant Phoenix has gone airborne amid the missile feud between US President Donald Trump and Kim Jong-un. War fears loom as 230 US jets and around 12,000 soldiers carry out drills on the Korean Peninsula. North Korea has warned the drill puts the world of the brink of

nuclear war, and warned it will not hide from conflict with the US. Constant Phoenix has been deployed in the region multiple times this year to monitor Kim. Dozens of missiles have been fired and a hydrogen bomb detonated by North Korea this year in its worsening feud with Trump.The spy plane often takes to the air when there are growing fears of a nuclear blast – earlier this year flying over Europe to investigate a radiation cloud. READ MORE

#US deploys “Nuke Sniffer” as North Korea may be on verge of detonating bomb

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savetopnow · 6 years

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2018-04-04 18 TECH now

TECH

Ars Techica

YouTube shooter IDed as woman angry at site’s “age-restricted” policies

Apple has hired Google’s head of search and artificial intelligence

Panera accused security researcher of “scam” when he reported a major flaw

Two founders of cryptocurrency offering arrested, charged with fraud

Google bans cryptomining Chrome extensions because they refuse to play by the rules

Buzzfeed Tech

Today’s Shooting Showed How Bad Twitter’s Misinformation Problem Is

This Country Said It Would Punish Journalists For Writing Fake News But Changed Its Mind

Grindr Is Letting Other Companies See User HIV Status And Location Data

Chick-Fil-A Will Soon Be Bigger Than Taco Bell, Burger King, And Wendy's

Sen. Ed Markey Says "Congress Must Act" When Facebook Fails To Maintain Safety On Its Platform

CNet

This bike sharing company just got bought for $2.7 billion - CNET

Spring-time to win-time sweepstakes! - CNET

Here's what we know about the shooting at YouTube HQ - CNET

YouTube HQ shooting: Three injured, suspected shooter dead - CNET

YouTube HQ shooter has been identified as Nasim Aghdam - CNET

Clean Technica

Tesla Model 3 — Cash Cow When Tesla Needs It Most

Tesla Begins Rolling Out Solar Roof Tile Installations In California

WB Mason Receives Ryder-Managed Fleet Of Workhorse E-GEN Electric Vans

California Gets 33rd Hydrogen Fuel Cell Car Refueling Station — Why The Slow Pace Of Infrastructure Development?

Ford Exec: We Could Begin Making EVs In Germany After 2023

Hacker News

A man who spent $100K to remove a lie from Google

Ubiq (YC S17) Is Hiring a Developer for Front-End in Waterloo, ON

Suspect in YouTube Shooting Posted Rants About the Company Online

What’s The Deal With Transparent Aluminum?

Microsoft calls for dismissal of U.S. Supreme Court privacy fight

Mashable

Battered by tourists, the Thai beach from 'The Beach' to close temporarily

Qantas using its cargo hold for sleep and exercise? It's one of many wild ideas

Bumble counters Tinder's parent company lawsuit on patent infringement

Massive solar power project will be 100 times larger than any in the world

New Zealand's privacy commissioner is also done with Facebook

Motherboard

A Note About 'Shenzhen's Homegrown Cyborg'

Facebook Deletes Hundreds of Accounts Controlled By Russian Propagandists

San Bruno Police Are Responding to a Shooting at YouTube HQ

The World’s Fastest Commercial Drone Will Drop Blood on the US This Year

What Kind of Maniac Wants 16-Person Snapchat Video Calls?

New York Times Technology

Executive Who Sold Self-Driving Truck Start-Up to Uber Departs

A Quick Online Divorce for $60? Not So Fast, Denmark Says

Shooting at YouTube Offices Wounds 3; Female Suspect Is Dead

Spotify’s Wall Street Debut Is a Success

Grindr Sets Off Privacy Firestorm After Sharing Users’ H.I.V.-Status Data

Recode

Here’s YouTube CEO Susan Wojcicki talking about controversial monetization changes on the platform

As women in tech gain experience, their pay gap with men gets worse

Four people have been shot at YouTube HQ in Silicon Valley

At $27 billion, Spotify is the seventh-most-valuable internet company to go public in the U.S.

Facebook is banning hundreds more accounts run by Russian trolls

Reddit Technology

FCC Commissioner Slams Her Own Agency for Policies 'Custom-Built' to Favor Sinclair-Tribune Merger

Amazon patent reveals 'voice sniffer algorithm' that could analyze conversations

Apple is moving on from Intel because Intel isn’t moving anywhere

The Man Who Spent $100K To Remove A Lie From Google

Reuters Technology

China's Meituan Dianping acquires bike-sharing firm Mobike for $2.7 billion

Woman wounds three at YouTube headquarters in California, then kills herself

Amazon may offer to buy India's Flipkart: report

Philippine anti-trust agency starts review of Grab-Uber deal

Spotify shares jump in record-setting direct listing

Slashdot

Swedes Turn Against Cashlessness

YouTube Shooter 'Nasim Aghdam' Reportedly Had Website With Manifesto That Targeted YouTube For Censorship, Demonetization

Schools Won't Like How Difficult the New iPad Is To Repair

Facebook CEO Says Not Planning To Extend European Privacy Law Globally

MIT Severs Ties To Company Promoting Fatal Brain Uploading

TechCrunch

500 Startups takes strategic investment from Abu Dhabi Financial Group

This new venture fund has more than $180 million to invest in interactive entertainment startups

Chinese bike-sharing pioneer Mobike sold to ambitious Meituan Dianping for $2.7B

JUMP Bikes weighing Uber $100m+ acquisition, investment offers

Spotify’s missing money-maker is artist-to-fan messaging

The Next Web

March in Africa: Uber on motorcycles, Spotify’s arrival, and solar panels

If Facebook cared about us at all, it would adopt EU privacy standards globally

Apple snaps up Google’s AI chief to fix Siri

Facebook confirms: Donald trumped Hillary on the social network during 2016 election

Facebook update shows which of your friends are suckers for fake news

The Verge

Alexa now lets you play music with smart home Routines

OnePlus CEO confirms key OnePlus 6 specs

Apple hires Google’s former AI boss to help improve Siri

Facebook suspends 273 accounts and pages linked to Russian misinformation agency

A YouTube manager’s Twitter account was hacked to spread fake news during shooting

WSJ Tech

Spotify's Splashy Debut Pressures Banks

Three Wounded, Suspect Dead in Shooting at YouTube Headquarters

Apple Needs to Fix 'Do Not Disturb' Mode---Here's How

Tesla Misses Model 3 Production Goal but Shows Progress

Virtual Reality, Now With the Sense of Touch

Wired

The Politics of ‘Black Panther’ Are What Make It Great

You Know, for Kids

The Life Issue

‘The Sky Is Yours’ Combines Dragons and YouTube

The Uber Crash

#tech

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