The principle is pretty simple. The spheres have a very precise weight/volume ratio and expands very little with heat. The liquid they're suspended in expands more. When the liquid expands its weight per volume decreased as causes the spheres to sink and vice versa. Because there's small differences in weight/volume for the spheres they float/sink at different temperatures.
Well the spheres can fade but it should not cause inaccuracy. Of course while it's in the sun it's being heated by I wouldn't call it inaccuracy - it basically just displays it own temperature no matter in sun or not.
Regret I didn't get one with all same colored then I wouldn't worry as much about fading as they then fade the same.
I had read on the box it came in that fading somehow changes the density and therefore inaccuracy results. I like it with colors though since its pretty.
Can't reject the box didn't say that but to be true I'm a bit skeptic about that because the spheres are sealed and no material can come in or out.
Btw you can Galileo thermometers with clear spheres now but not when I got mine in the 90s when they started to appear as consumer products. A Dr. Friedrichs. Has had some more but always ended up giving them away because they don't live up to the quality of Dr. Friedrichs (German brand). Unfortunately I don't have mine box so can tell what it says.
Just struck me. It it's plastic then sunlight might be able to change the spheres. My parents have an even older Galileo - but in all plastic - same brand if I remember correctly they got as a gift when the glass ones where very expensive.
its called magic. get used to it. (actually HifiCentret had a nice long explination)
zxeros 2 years ago
The principle is pretty simple. The spheres have a very precise weight/volume ratio and expands very little with heat. The liquid they're suspended in expands more. When the liquid expands its weight per volume decreased as causes the spheres to sink and vice versa. Because there's small differences in weight/volume for the spheres they float/sink at different temperatures.
HifiCentret 2 years ago
I have one sitting on my shelf. Its a 13 inch one,I wish I would have gotten a bigger one, but I love it anyway! Its awesome!
CGAlex22007 3 years ago
Cool I have one just like that. They are never supposed to be in the sun by the way. It fades the liquid inside the spheres and causes inaccuracy.
SevereTstormFan 3 years ago
Well the spheres can fade but it should not cause inaccuracy. Of course while it's in the sun it's being heated by I wouldn't call it inaccuracy - it basically just displays it own temperature no matter in sun or not.
Regret I didn't get one with all same colored then I wouldn't worry as much about fading as they then fade the same.
HifiCentret 2 years ago
I had read on the box it came in that fading somehow changes the density and therefore inaccuracy results. I like it with colors though since its pretty.
SevereTstormFan 2 years ago
Can't reject the box didn't say that but to be true I'm a bit skeptic about that because the spheres are sealed and no material can come in or out.
Btw you can Galileo thermometers with clear spheres now but not when I got mine in the 90s when they started to appear as consumer products. A Dr. Friedrichs. Has had some more but always ended up giving them away because they don't live up to the quality of Dr. Friedrichs (German brand). Unfortunately I don't have mine box so can tell what it says.
HifiCentret 2 years ago
Just struck me. It it's plastic then sunlight might be able to change the spheres. My parents have an even older Galileo - but in all plastic - same brand if I remember correctly they got as a gift when the glass ones where very expensive.
HifiCentret 2 years ago
Thermometer
clintarnold 3 years ago