MEASURING DEVICES

In this post I wanted to detail and talk a little in depth about several measuring devices, delving into those that correspond to mass, length and time. In turn, I mentioned the best known and I added a video at the end that collects in photographs many of the devices used to measure not only mass, length and time, but also speed or pressure among others ...

To measure mass:                                                                           

1. Balance                                                                                         
2. Weighing machine
3. Mass spectrometry: is an analysis technique that allows determining the distribution of the molecules of a substance as a function of its mass. The mass spectrometer is a device that allows to analyze with great precision the composition of different chemical elements and atomic isotopes, separating the atomic nuclei according to their relationship between mass and charge (m / q).
4. katharometer: is an instrument used for determining and measuring the mass / composition of a gas mixture. It is a thermal conductivity detector.

To measure time:                            

1. Calendary
2. Cronometer
3. Clock
4. An atomic clock is a type of clock that uses a normal atomic resonance frequency to power its counter. The first atomic clocks took their reference from a maser
5. Radiometric dating: Radiometric dating is a technical procedure used to determine the absolute age of rocks, minerals and organic remains (paleontological) .1 The method is based on the proportions of a "parent" isotope and one or more descendants known its half-life or half-life period, contained in the sample to be studied.2 The isotopes suitable for analysis depend on the type of sample and the presumed age of the remains to be dated. Radiometric dating has been done since 1905, when this method was developed by Ernest Rutherford as a method by which to determine the age of the Earth. Since then the techniques have been greatly improved and expanded

To measure length:

1. Measuring tape
2. Ruler

3. Vernier caliper:The caliber, also called gauge, sliding bevel or caliper, is a measuring instrument, mainly of external diameters, interior and depth, used in the industrial field. The vernier is an auxiliary scale that slides along a main scale to allow exact fractional readings of the minimum division. To achieve the above, a vernier scale is graded in a number of equal divisions on the same length as n-1 divisions of the main scale; both scales are marked in the same direction.
4. Micrometer:The micrometer, which is also called Palmer screw, Palmer caliber or simply palmer, is a measuring instrument whose name derives etymologically from the Greek words "μικρο" (micros, which means small) and μετρoν (metron, which means measurement). Its operation is based on a micrometric screw used to assess the size of an object with great precision, in a range of the order of hundredths or thousandths of a millimeter (0.01 mm and 0.001 mm, respectively)

5. Interferometer is an optical instrument that uses the interference of light waves to measure with great precision wavelengths of the same light
6. Odometer: It is a measuring instrument that calculates the total or partial distance traveled by an object or thing. In the unit of length in which it has been configured (meters, miles). Its use has become widespread due to the need to know distances, calculate travel times, or fuel consumption.

And here is a video (in spanish) with all the instruments explained before and more...