How are scales and balances constructed?

Question

A website would be preffered, as I can't find one.

Answer 1

Modern scales use strain gages as the basic building block.

Check out this site:

http://zone.ni.com/devzone/cda/ph/p/id/144

A balance is simpler and more primitive since the symmetry of the device is the basis. Weights are added to the side opposite the object to be weighed until the gage centers.

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