Comment by MarkusWandel
7 days ago
I used to have a bathroom scale with a single strain gauge that was accurate. Accurate, as in weigh yourself, pick up a 1lb object, weigh yourself again and see an extra pound. That scale had a "lifetime" nonreplaceable battery in it and after 20 years or so, gave up the ghost.
Every scale I've tried since is wildly inaccurate, and they do have brains and they fake it. Step on, get a random weight within a 5lb range of the true weight. Step on repeatedly, even after the scale has timed out and had to be rezeroed, and get that exact weight again. Fake. Every single 4-sensor scale (one in each corner post) that I've tried does this.
I've since found another relatively vintage single strain gauge scale whose battery still works. And I have a mechanical scale in reserve for when it no longer does.
> Accurate, as in weigh yourself, pick up a 1lb object, weigh yourself again and see an extra pound.
That's resolution (or dynamic range), not accuracy. The scales could be 10lbs off of your weight and still do this.
I did test it with various known weights. It was a good scale.
> Fake. Every single 4-sensor scale (one in each corner post) that I've tried does this.
Huh. I have never experienced this and didn't even know this was a thing. My cheapo Chinesium scale that I bought from Amazon years ago occasionally jumps by a pound or so. I measure myself a couple of times to be sure. But it definitely doesn't "freeze" measurements, as I see a different measurements shoes on in back-to-back measurements.