Crazy Measuring Tool

[Woody Sound]

[Ukena]

Maybe the metric side is more accurate... would make sense if it were, since the suggestions on the face of the tool are all metric...

[emanresu]

Oh.
I think it should be criminal to sell measuring tools with error over a certain margin. Safety hazard.. when building something that could fall on you.

I got an angle measurer that is off by 1 degree, and a level that has the bubble off by 1mm.

I mean, it's not about the money. But such tools should be sacred and always accurate. Selling something like this to masses... disgusting.

[nevershouldhavesoldit]

C'mon now, guys - there's no mystery. It's a tempered scale...

[garybaldy]

If that's for measuring action, who has a 3" action?

[dconeill]

The tool doesn't look very usable as shown.

The side with an (accurate) English-measure should show a table with actions in inches; the side with a (hopefully accurate) metric measure should show a table with actions in mm.

As shown, you'd have to do conversions with every measurement you made. It's easy - all you have to do is multiply the English measure in inches by 25.4. You can do that in your head, right? (Right.)

And that doesn't even consider that one (or both) of these English rulers are inaccurate.

Get another measuring tool that's actually usable.

[Woody Sound]

OP here. What we have is, instead of correctly marking 25-50-75 mm's, they marked *those* points with incorrect inch indicators.

[BBGuitar]

Which one is correct?

[emanresu]

BTW!


One of the biggest and most important change in all measurments happened just a decade ago or so... let me see.

Chatgpt:
Certainly! Here's a compact and readable version for a forum post:

---

In 2019, the SI units underwent a major redefinition, marking a shift from physical standards (like etalons) to fundamental physical constants and theoretical concepts. Before this change, units like the kilogram and the meter were based on physical objects: the kilogram was defined by a platinum-iridium cylinder (the International Prototype of the Kilogram), and the meter by a platinum-iridium bar.

However, in 2019, the kilogram was redefined based on the Planck constant (h), a key constant in quantum mechanics. The meter is now defined by the speed of light (c), which is a constant in physics. These changes removed the need for physical prototypes, making the definitions of these units more universally accessible and reproducible.

This transition reflects advances in precision measurement and theoretical physics, ensuring that units are tied to constants that are consistent everywhere. With this shift, the world of metrology is more aligned with modern science, where measurement is based on fundamental and unchanging properties of the universe.

So, the shift from physical objects to theoretical concepts in defining key units of measurement officially happened in 2019.


edit... 6 years ago. not a decade even.

[Woody Sound]

Which one is correct?

The narrow one is correct for inches. The wide one is correct for mm's. But they have the 25 mm's marked incorrectly as inches. (Note the divisions of 5 cm's, rather than even #s.)

Needless to say, I returned it immediately.