Stoffel @Stoffel78179983
Joined August 2022-
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Following693
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Here are the more detailed results of @CriticalAerosol 's testing, using a PortaCount! Thanks again, @CriticalAerosol!
Here are the more detailed results of @CriticalAerosol 's testing, using a PortaCount! Thanks again, @CriticalAerosol! https://t.co/n26b4BwIhu
I don't know who needs to hear this, but evidently it's a lot of people: HAVING 👏 CONCERNS 👏 ABOUT MRNA SHOTS 👏 DOES 👏 NOT 👏 MAKE YOU 👏 AN ANTI-VAXXER 👏 There's a difference between following science and placing unquestioning faith in one product produced by science.
It’s simply breathtaking to me to watch vaccine zealots blame the extreme increase in vaccine hesitancy on anti-vaxxers. They cannot fathom that this trend is because of their singular focus on getting one vaccine in everyone’s arms as quickly as possible at all costs to the…
I made a short video for the AirFanta 4Lite laminar air purifier. A small batch is on the way to US warehouse. It can be pre-ordered now. This week replacement filters will also be shipped. In a few days I will make a longer video introducing the how the filtrated laminar flow…
I made a short video for the AirFanta 4Lite laminar air purifier. A small batch is on the way to US warehouse. It can be pre-ordered now. This week replacement filters will also be shipped. In a few days I will make a longer video introducing the how the filtrated laminar flow… https://t.co/Lf8ahiBPH8
Nope WSJ not falling for this bullshit. WFH will never die. GFY.
Are you ready for the next blast? 💨 Introducing to you, the P14 Max - the big brother of our high-performance PC case fans is finally here. ❄️ We're ready to take your system to peak performance. 💻 #cooledbyARCTIC #ProductLaunch #arctic #cooling #computer #tech #pcmasterrace
@healingfromlc It filters out 95% of 0.3um particles, at 85LPM(which is heavy work load breathing) after loading 200mg on to the filter(which is the same amount as the filter would see after 200 days in a polluted city). In practice for respiratory aerosols and moderate breathing its 99+%
Respirators with ear loops. I know many folks still have concerns, but if 3M is selling them in multiple markets, and gives them an FFP3-equivalent tag, there's good chance they'll pass fit tests won't they?
Testing the laminar flow purifier "AirFanta 4Lite". At 30cm(12") distance, the numbers of particle of 0.3micro is 97.9% less than the environment. This is a very effective way when you can't put on a mask, i.e. eating or drinking.
In the mini category the Machine X stands out (provided by Nukit). Its strength lies in its Volume Index with only 363 cubic inches. At maximum, the CADR is 206 cfm for quick cleaning, and at a very quiet setting, it's 58 cfm.
Phew, finished the work in the test room. Taking a break and will tidy up the greenhouse tomorrow. Next week, I'll have to share all the data from all the files I've been working on.
@nothxjstlooking @psvbluemts This is the situation I’m going for if I need it for the ER or something which would hopefully mitigate the situation you’re describing. Lights by @NukitToBeSure , QT3 case/light holder by @steadirob
@biologistellie @JetstarAirways Impact of seat position on aerosol distribution when coughing on a plane. Left: seats upright. Right: reclining. From a study by RIKEN.
The first machine i've tested on my long list in test chamber was the NorthBox mini Impressive results. I looove this device Here the results
@OpenAeros has done what many thought was impossible: create a low-cost, open source condensation particle counter. It’s the core technology needed for high-performance mask fit testing, and we are excited to show off our progress. Big thanks to Balvi for believing in us.
@OpenAeros has done what many thought was impossible: create a low-cost, open source condensation particle counter. It’s the core technology needed for high-performance mask fit testing, and we are excited to show off our progress. Big thanks to Balvi for believing in us.
The Nukit Open Air Purifier is now available for download: github.com/opennukit/Nuki… We have three basic versions to work with- tower, flush wall mount, and hanging. All use 140mm fans, and 2"x20"x20" filters. They have been tested, although different laser cutters have slightly…
I updated the Nukit Open Air Purifier design to align more closely with @DavidElfstrom's vision. The Tempest-style lid was much too fiddly in 3mm wood, so I went with the requested side/top-loading friction fit filter channels. This makes the box much stronger and when I move it…
@_CatintheHat @DavidElfstrom TaoBao has some that break down for travel:
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Abundant Pedestrian S.. @AbundantLandUse
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812 Followers 1K Following Retired Marketing Manager, Gardener, Parent, Grandparent, Lover Of Life, and Seeker of Truth.
Parenting Mishmash ۗ.. @ParentMishmash
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189K Followers 332 Following In-Flight emergencies, reasons sometimes found out through sources. If you think my tweets are helpful 👉 https://t.co/nlt191Ryrb DM for business enq..
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1.1M Followers 622 Following Track air traffic in real time from all around the world! Apps: https://t.co/AnZhJUIrBg | FAQ: https://t.co/WkTgAaePHs | Support: https://t.co/BomORktp7R
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拍帮主（争当钉.. @paibangzhu
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シナモロールカ.. @Cinnamon_cafe_
54K Followers 10 Following 東京と大阪にあるサンリオキャラクター シナモロールのカフェ 「シナモロールカフェ」の公式アカウントです♪ ※リプライへの返信は致しません。お問い合わせはHPメールフォームにてお願い致します。 ＜当アカウントは株式会社グルマンディーズが運営しております＞
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Here are the more detailed results of @CriticalAerosol 's testing, using a PortaCount! Thanks again, @CriticalAerosol!
FF 5-10 is assuming the filter is maintained 12" from breathing zone w/ typical indoor airspeeds from natural or mechanical ventilation. Worst case would be lower FF if a fan is blowing towards you and disrupting the laminar flow.
@Stoffel78179983 I used a Pureberg filter, it's 550~600 ft/m.
@Stoffel78179983 @NukitToBeSure @ghhughes I see some sellers on eBay offering 3M Versaflow TR-300 systems for $300-400 (retail is >$1000). Still very expensive, but it's an investment: it's tested, you can pull the mask bottom elastic up to your upper lip for dentist visits, and it is useful for other medical visits.
@Stoffel78179983 Sorry, not 1500, but around 1000~1250 ft/m, without filter.
@Stoffel78179983 It's a 75mm centrifugal at 5V 400mA. I remember speed is about 1500 ft/m. So typically you'll need a booster with Li-ion 3.7V or 3V with short circuit protection to make it safe for wearables. Option for charge/discharge at the same time isn't ideal... x.com/abundantlandus…
Lately I've been trying to get the weight lower by 100g, so I tried out some voltage converter modules (MT3608, S9V11F5) and charge/discharge modules(TP4056, JK624, DR369). Too much disappointment, but I finally settled with one of them for safety and reliability. 1/
Boeing's 787 "Dreamliner" is manufactured far from the company's Seattle headquarters, in a non-union shop in Charleston, South Carolina. At that shop, there is a cage full of defective parts that have been pulled from production because they are not airworthy. 1/
@Stoffel78179983 @NukitToBeSure @ghhughes Same brand, but this ebay.com/itm/2045750617…
@open_erv @ghhughes @Stoffel78179983 @NukitToBeSure That’s what I did, exhale valve below the nose to direct the excess airflow over my mouth x.com/ParentMishmash…
Here’s pictures for my Dental PAPR build
Here’s photos of the assembled dental PAPR and a photo of it in use at the dentist
@heysugardumplin It’s certainly privilege when their biggest worry is avoiding COVID…
@open_erv @Stoffel78179983 @NukitToBeSure There are a few products that are designed for use respirators, such as UV cure glues that have been evaluated for cytotoxicity. But that kind of specialization and vetting is more expensive, and not found in one's local hardware store. masterbond.com/industries/res…
@Stoffel78179983 @open_erv @NukitToBeSure And I use the Philips CPAP recall as an example that even experts using materials that are supposed to be safe can be wrong even though that is specifically to do with the foam they used inside the device, and not glues or solid plastics. Just things to keep in mind.
@Stoffel78179983 @open_erv @NukitToBeSure I can find whether things are rated for food safety, but for the most part I can't find ratings for glues and construction materials for respiratory safety. So I don't have good objective ways to evaluate the respiratory safety of various materials used for respirator hacks.
@Stoffel78179983 @open_erv @NukitToBeSure With some glues I think the solvent mostly evaporates initially, but some can continue off gassing for a while. Probably not usually a problem if it's just an object in a room, but if you're huffing air through it as a respirator, it could be a different issue.
This post generated quiet a lot of controversy, that included commentaries about privilege and even race! My aim in posting was to shine a light on two great engineers who are doing a lot to mitigate SARS-Cov-2 transmission. /1
Healthy eating thanks to @NukitToBeSure and @Engineer_Wong
@Stoffel78179983 @adamsmomof4 @marigoldglitter @NukitToBeSure And these can last for a long time. The key is that more adaptation, more reduction of Rt, and less dangerous for poor, marginalized, and racialized community.
@open_erv @Stoffel78179983 @NukitToBeSure I think part of the attraction to hot glue is that it is not solvent-based, which, superficially at least, makes it seem safer for hacking together respiratory protection devices. But I don't really know what adhesives and sealants are actually safe. They're not rated that way.
@Stoffel78179983 @NukitToBeSure I would also keep in mind the Philips CPAP recall of CPAPs due to friable internal foam that may have led to lung injuries and cancer in some people. Hot glue is not necessarily approved for respiratory protection use. It may be just fine but it's hard to find solid data.
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