SU84078A1 - A device for determining the content of paramagnetic gases, in particular oxygen, in a mixture of gases - Google Patents

Description

Instruments are known for determining the content of paramagnetic gases in a mixture of gases, based on the phenomenon of thermomagnetic convection of paramagnetic gases in an uneven magnetic field. This phenomenon is that if a thin platinum filament is heated to a certain temperature and surrounded by a paramagnetic gas and is in an uneven magnetic field, the gas particles surrounding the filament heat up, lose their magnetic properties and are pushed out of the magnetic field, giving way to a colder one. gas particles.

The known devices of the mentioned type with four (or two) Wheatstoti-platinum threads included in the shoulders of the bridge, of which two (in devices with two threads one) are placed in an uneven magnetic field, have a number of drawbacks, namely that they depend on the pressure of the gas, on the ambient temperature and on the intensity of the magnetic field.

In the described device, these drawbacks are eliminated due to the fact that the platinum threads against the negative shoulders of the Wheatstone bridge are placed in pairs in two chambers: one is hermetic for the reference gas and the second is flowing for the gas under study.

The chambers are made in a common metal case and are located so that they are in an uneven magnetic field of a permanent magnet, equipped for this purpose with two pairs of pole pieces.

The elimination of the influence on the instrument readings of changes in the value of the pressure is achieved by the fact that both chambers are connected to each other by a channel with a flexible gas-tight membrane.

FIG. 1 shows the scheme of the proposed device; in fig. 2 is a diagram of a device with two Wheatstone bridges, in the diagonal of which are included the gauge coils.

The design of the instrument is a Wheatstone bridge, the shoulders of which are formed by four platinum filaments placed in pairs

No. 84078- 2 two chambers / and 2 in a massive metal casing 3. A test gas mixture passes through the chamber /, for which the chamber is equipped with two branch pipes 4, 5, and chamber 2 is hermetically sealed and filled with a mixture of gases whose oxygen content is known.

In order to ensure equality of pressure values in both chambers I c 2, they are interconnected by a channel with a flexible membrane for the gas 6.

All four filaments of the iribor are in a non-uniform magnetic field created by a permanent magnet 7 having two no pairs. 8 n 9. of which one is located at the camera., and the second at the camera 2.

The oxygen content of the test gas equal to the content of it in chamber 2, the intensity of the thermo-magnetic coivennn due to smmmmstrin will be in both chambers () dpia; -; about 5a. The temperature and resistance of the drink will be rabbi and washes blvd, em to equilibrium. A change in the composition i4.;:. A in chamber 1 will cause a change in ve. (nchiny kon15ektsnn and steam H1C11 not oa.iaiica bridge.

 therefore, in the proposed; device change BiieinHeio yes:; lei, change in ambient temperature and change Haiiji / izhe;: magtypogo floor will have an odor change, and one and the other. The effects of thermomagnificia coivexchio in both amers, i.e., impacted, caused by these. from: .1пеп11 1.м1 unscheduled, will be reduced to 1mm.

By selecting the corresponding content of a kn.cv in 1 am: 1) e 2, you can; ieri o, nrn o; and; they are the same MexainniecKiix and elektrnchee) 11x yes11ych, get different, 1i: ter, aly measurements. For example, from O to 10%, from 50 to.), From 90 to ICOij, and so on. Ii.

The power supply of the bridge luzhet SU.LG osu1stv, lei koremeiiyym current ivyipytoy аетaotito, as well as onei1p-) 1M. About the nose; 1edis: In the case of Yugug life :, nonparticly melted into the following: a layer of the isoline, and ip; a glass ep. Thank you to the fact that the currents of these and their interests are on the sides:, ii and almost avia, mechanical eiijibi from their interaction with mg g} it1plm io; 1e; L will be mutually equivalent.

.. ue iiiio about, snecheii () about; ;; Itey y vCTinri slyyos: and wats: First, Iovne measure | a diagram ia r |; i. 2

Here it seemed, oh ii3. I and 2 nl and io four

In this current, the two shoulders of each bridge were torn: nomen: e or 1 gravimetric magnetic; Steam from the bridge bridge is fed by a JO jointer gauge.

iia is no longer in the mix) amaginti (ich) aza vi5iI5aet (jico,: io HIITCII hh / periumentot o coinequin) and, therefore, their cooling, which in turn is irivo; and T to change the hygiene and genre diag (H1al x MOCO) 1 ha poo choke.

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1. A device for determining the content of non-magnetic gases, and in particular oxygen, in a mixture of gases, based on a thermo-magnetized conical and paramagnetic gases in a perpendicular magnetic field and made in the form of a Wheatstone bridge, with a platinum, streamlined test gas, included in its shoulders, a gas that is heated by a platinum gas, a streamlined gas inlet gas, and a platinum gas flowed by its current, heated in it, and a heated gas in it. and in a non-uniform magnetic field, which is the case.