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A portable device for measuring relatively small values of electrical resistance.
an instrument that floats in a liquid and measures its specific gravity on a scale
an apparatus for measuring altitude
a hydrometer
An apparatus for measuring the heat generated or absorbed by either a chemical reaction, change of phase or some other physical change
A device that measures the magnitude of an electric current, especially one calibrated in amperes
An instrument for measuring acceleration
An SI/MKS unit of measure, the length of one one-millionth of a meter. Symbols: µm, um, rm
A device which marks or records time or time intervals
An instrument for measuring the focus of the lens of the eye.