- The balance or scale: electronic or mechanical devices are being used in homes, industries, laboratories and companies to determine the weight, or, well, mass of an object, thing or substance. The balance is made up of a bar in perfect counterbalance the which hang two dishes, one at each end, and is supported by the center of this bar a foothold in the smallest possible .
The scale is formed by a platform has made possible the construction of some whose capacity is large measuring tons.
- catharometer: is an instrument that measures the concentration of small amounts of gas , comparing the thermal conductivity of gas against analyzed sample gas conductivity resulting in atomic mass, although obtaining the results is a little slower in comparison to the next instrument. - mass spectrometer: this instrument seeks to analyze the samples by determining the masses of its ions , analyzes with great precision composition of different chemical elements and isotopes atomic splitting atomic nuclei according to their mass ratio - charge (m / z).
- catharometer: is an instrument that measures the concentration of small amounts of gas , comparing the thermal conductivity of gas against analyzed sample gas conductivity resulting in atomic mass, although obtaining the results is a little slower in comparison to the next instrument. - mass spectrometer: this instrument seeks to analyze the samples by determining the masses of its ions , analyzes with great precision composition of different chemical elements and isotopes atomic splitting atomic nuclei according to their mass ratio - charge (m / z). 
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