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electronics.howstuffworks.com/gadgets/fitness/digital-scale.htm

Scales use somewhat different physical principles and mechanical components to measure weight and other forces (weight is simply the force on an object due to gravity). Spring scales, for example, measure weight using Hooke's law, which relates force (weight) to the stretching or compression of a spring made from a given material.

www.explainthatstuff.com/weights_and_balances.html

Scales people use to weigh themselves often work this way. You stand on a platform and your weight, pushing down, compresses a pressure sensor called a piezoelectric transducer. This is a kind of crystal that makes an electric current when you squeeze it: the harder you push, the more current it makes. So the heavier you are, the more current ...

www.hunker.com/12183358/how-does-a-digital-scale-work

Digital scales work with the use of a strain gauge load cell. Whereas analog scales use springs to indicate the weight of an object, digital scales convert the force of a weight to an electric signal.

www.fitnessmusthaves.com/scales/how-do-body-fat-scales-work

Indeed, these scales are becoming increasingly more advanced and can now measure things such as water weight percentage, metabolic age, bone mass and much more. How Do Body Fat Scales Work? The vast majority of body fat scales use ‘bioelectrical impedance analysis’ (BIA) to read your results.

home.howstuffworks.com/inside-scale.htm

We have all stood on a bathroom scale at least once or twice in our lives. In this article, we will examine how a bathroom scale works. Here is the scale we will be exploring today: When you take off the cover what you find is a large dial, a rack and pinion arrangement that turns the dial, a spring ...

www.wonderopolis.org/wonder/how-does-a-scale-work

Scales are valuable tools that help us keep track of our weight. In addition to doctors' offices, you'll also find scales in most homes…probably behind the bathroom door, under the bed, or in the closet! Have you ever WONDERed exactly how a scale works, though? You can step on a rug and it won't tell you how much you weigh.

www.livestrong.com/article/354963-how-do-body-fat-scales-work-are-they-accurate

Although a scale is a useful tool in measuring weight loss, it is limited to evaluating only one component: weight. When it comes to health risks related to being overweight, fat is the culprit. Measuring body fat percentage is a better indicator of how well your diet and exercise program is working.

shop.transcell.com/how-digital-scales-work

Weight indicator: many digital scales come with an LCD screen where the measurements of the weight obtained are displayed. The Load Cell: this is a transducer whose significant function in the scale is to convert the force exerted by the object of measurement into an electrical signal.

www.weightwatchers.com/us/our-approach

Find out how the #1 rated Freestyle™ program from WW (formerly Weight Watchers) works and can help achieve your weight-loss goals.