The Danjon scale, named for Andre-Louis Danjon measures the relative brightness of the moon during a total lunar eclipse.
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A spring scale measures weight.
The Beaufort scale is a measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort Wind Force Scale, although it is a measure of wind speed and not of "force" in the scientific sense of the word.
You use a triple-beam scale to measure mass.
The Richter Magnitude Scale. The magnitude is a base-10 logarithmic scale obtained by calculating the logarithm of the amplitude of waves measured by a seismograph. An earthquake that measures 5.0 on the Richter scale has a shaking amplitude 10 times larger and corresponds to an energy release of approximately 31.6 times greater than one that measures 4.0 The same applies comparing a 4.0 to a 3.0, a 6.0 to a 5.0, and so on.
Because it is a weight measuring instrument which is able to measure weights to an accuracy of about 5 to 10 gram. Spring Balances which are commonly for cooking measures,are not very sensitive or accurate. You can only get an accuracy within about 20 grams with spring balances.