#Metrology

[4denthusiast]

So, the Celsius vs. Farenheit thing is obviously silly, in that people are just going to find whichever they're used to more intuitive, but that said...

I disagree with the "Farenheit uses digits more efficiently for everyday discussions about the weather" thing. A single degree Farenheit seems to me imperceptibly small. A single degree Celsius is roughly the limit of what I find perceptible, but is still a pretty small, insignificant difference. People who say Farenheit uses its digits more effectively seem to be basically just ignoring the 10^0 digit and just using the 10^1 digit instead. That's not efficient. I'm not sure I'd say Celsius is significantly better. "20"/"low 20s"/"mid 20s"/"high 20s" (in Celsius) seems to be about the level of precision people normally use.

This suggests that a temperature scale that's actually optimised for using its digits effectively for everyday use would be roughly a few times the size of Celsius. There happens to be just such a scale, one that pre-dates both Celsius and Farenheit even: degrees Newton. 0°N=0°C=32°F, so we keep the freezing point of water as a nice landmark, very relevant to discussing the weather. A difference of 1°N is roughly 3°C or 5.5°F. A large proportion of normal weather is in the range 0°Q to 9°N, necessitating only a single digit (how's that for efficiency?). A single degree is a small but clear difference, around the level of precision people normally use. If you want to go to fractional degrees, that's fine, but it's marked as something unusually precise. Maybe they'd do that in weather forecasts. 10°N, a clear milestone, is about 30°C or 87°F, which is distincly hot weather. 20°N is roughly the maximum recorded temperature the weather on Earth has reached. The next big milestone, 100°N, doesn't really correspond to anything important I can think of. It's pretty high even for cooking, just slightly higher than the melting point of lead.

Newton's scale does have a major disadvantage that it's not actually clearly defined, since Newton only gave a single reference point, but that's not relevant to the current discussion. Maybe something slightly more fine-grained than degrees Newton would be a little better. I was originally going to use my own made-up scale with units of 2.5°C for this post before learning that the Newton scale already exists.

Anyway. Obviously I'm not actually proposing that people adopt Newton's temperature scale. Pretty much any temperature scale vaguely around the range of Celcius/Farenheit/Newton/Rømer/whatever would do fine for everyday use (even Kelvin wouldn't be that bad, just so long as you're not using something like joules (≅7.25*10^22 K)). I just wanted to make the point that the "Farenheit uses its digits efficiently." thing isn't actually right, it's just that Farenheit uses its digits in the way that Farenheit users are used to.

[maybe-apangolin]

Here's another thing I drew for a friend.

[graffiti-library]

- Metrology, Classic Amsterdam Subway Graffiti - 2022 - 

- oblong 22.9-15.8cm - softcover -

[man-and-atom]

The reporter at the Jerusalem Post who has the “meteor beat” is clearly making the most of it.

[viewmm]

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[geopolicraticus]

The Conceptual Naturalness of Metrology

The Miracle of Metrology.—Measurement is what distinguishes the natural sciences from the social and historical sciences, and which accounts, at least in part, for the relative success of the “hard” sciences in contradistinction to the “soft” sciences. The theoretical framework that makes measurement possible is the abstraction of natural science that interposes between the world and its mirroring in scientific theory. Natural science converged early in its history on uniquely fruitful abstractions that, like the intuitive formalism of the natural numbers, were so perfectly adapted to the mind that their denial is not merely seen as wrong, but as incoherent. But the conceptual naturalness of metrology is not without consequences. What we choose to measure, how we count, what metrics we employ, the scale of measurement we apply, the scales we contrast to each other, whether we use linear or logarithmic scales, the number systems we use to count our metrics—all these are as selective as the use of any source material that an historian winnows from a potential infinitude of evidence. The natural scientist, no less than the historian, constructs his narrative of the natural world from chosen sources, which, if chosen differently, would yield different theories. In this way the methods of the natural sciences and the methods of the historical sciences are parallel, and each is involved in analogous problems of interpretation as a result. Yet the happy choice of the abstractions of natural sciences makes them less visible, and therefore less problematic, than the deficient abstractions employed by historians.

[altem-technologies]

Artec Point

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[testrongroup]

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[pencotool]

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[labtroncc]

6 in 1 Multifunctional Environmental Meter

Labtron 6-in-1 Multifunctional Environmental Meter is a compact handheld device measuring air velocity, temperatures, humidity, and light. It operates from -10°C to 60°C, with a large LCD, data hold, Max/Min functions, and auto shut-off.

[metallurgyandmetrology]

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[ftsharp]

In 1742, Anders Celsius redesigned Delisle’s recalibrated temperature scale, and named it the centigrade scale, now reversed and called the Celsius scale. Poetry by Tom Sharp.

[mechanical30]

Flatness Testing - Mechanical engineering

Flat testing is possible by the comparing to the surface with accurate surface

Flatness inaccuracy of the surface states that departure against flatness is minimum separation of pair a parallel planes will be just contact all points on the surface.

Read More

[onemetricdylan]

So i just read this book on the history of measurement, and it has an entire chapter about reference standards like these cigarettes. There’s a hub of curated standards for studies/industry including an ��exceptionally average” jar of creamy peanut butter, approximately $400

i totally understand why these exist (consistent control group for scientific studies on the health impacts of smoking) but something about the phrase "kentucky reference cigarette" just tickles my brain

[samautomation]

Mitoya's Optical Profile Projectors are used for measuring and inspecting the dimensions and contours of objects. They typically use optics and light sources to project a magnified image of the object onto a screen, allowing users to measure various features with precision. These instruments are commonly used in manufacturing and quality control processes to ensure that products meet specified standards. It is the best Optical profile projecture device for measurements on digital display and data processor.

[vxo]

666.66 ohms, got it

Quietly, secretly cursed meter Okay, let’s try that again Meter that is, I swear, not cursed. No really. Not cursed at all. Might be cursed at some other point in time, but not now. I could try to explain what was going on with the curse, but I’ll leave it at this: it just… completely afflicted the resistance measurements and made me think a whole roll of SMT resistors were somehow open circuit…