Dial scales work on springs. The problem is that tension isn't always the same over time, or under different temperatures, so if the temperature in the room is different, or the scale is old, your weight will be inaccurate. New scales are decent, assuming the temperature and moisture is always the same. But since most dial scales use levers to reduce the amount of weight on internal peices by a ratio of about 1:12, the more weight, the more it will be off. Pretty much your dial scales are off by a percentage rather than a weight. So a percentage of an 8lb weight is less of a discrepency than a percentage of a person. I can't explain that part too well, but its due to the spring inside and the levers.
A digital scale is the same as a dial scale except for the way it displays the reading. Instead of moving a rack and pinion to display your weight, it triggers an electronic response on a chip. So the spring still does the same thing and offers the same problems. Perhaps a digital scale is a little more accurate because its one less mechanical peice that could fail, but I don't see a drastic reason to choice one over the other, unless you want a big bright number instead of a crude dial reading.
Also, a scale uses 4 levels to equalize the weight on the spring. So if one lever is higher than the others, it will change the reading. That's why having your scale on a level surface is important. Its also one reason why you would have different readings in different rooms. Also, a bathroom tends to be hot and moist after a shower, which would change the tension in the spring, and would change the reading you get. Scales are a "you get what you pay for" product. If you don't want to buy an expensive one, do what lalathestylist suggested. Weigh yourself at the gym or doctors, and go back immediately and weigh yourself on your own scale. I would suggest moving your scale out of the bathroom so its not all hot and moist sometimes and dry and cold other times. That will definately give you different readings. Well, theoretically ;)
I just bought a new dial scale a few days ago. Mainly because I didnt have the $85 to spend on a digital one. I dont know whats better as in dial vs scale. If its a bad brand its going to give you troubles no matter what and after time they are all going to become inaccurate I think.
This one is working for me for now, see how it goes lol
You can get a nice digital for around 50 bucks- and if you do some research you can probably find a reliable brand for around 30 online.
I don't trust dial scales. It seems like more people use digital for accuracy.
We have a fairly expensive digital scale that works for me. My primary concern is that I am losing ... slowly but surely. We put it in the exact same spot every Monday when I weigh-in .... then my DH hides it from me the rest of the week so I don't freak out.... hee hee hee.
=^..^= MOLLY
I've been using a dial scale. Lately I started to increase my calorie intake. I've always thought that I've been maintaining my weight, but now who knows?? T_T
Maybe I do need to fork over the money for a digital scale *sigh*
Original Post by pmorgan2:
A digital scale is the same as a dial scale except for the way it displays the reading. Instead of moving a rack and pinion to display your weight, it triggers an electronic response on a chip. So the spring still does the same thing and offers the same problems. Perhaps a digital scale is a little more accurate because its one less mechanical peice that could fail, but I don't see a drastic reason to choice one over the other, unless you want a big bright number instead of a crude dial reading.
I was under the impression that some modern digital scales use piezoelectrics. For example I don't see where the spring would be on those ultra-thin scales that are transparent.
Some older doctor scales use a counterweight system however the lever assembly is similar in operation to your home scale. I'm under the impression that doctors scales can be significantly off if they haven't been calibrated in a while.
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