DE1648855A1 - Arrangement for measuring the amount of conductive components in a substance, especially in ore - Google Patents

Description

1 6 A 8 8 5 5

»It. 3? 84? / 6β'- .prio S4-. 12.66

Barriager Research Linsitsu
Ontario «. Canada

. IS. December 296?

Arrangement sur measurement of the ⁵ Meag; e leifcf Mhiger proportions in a substance, especially in-ore

It is often desirable to determine the amount of conductive components in a substance, specifically in a substance that is moved on a moving surface. So ss example of smelting often necessary v en sulphide content. © n -Qrober3 on a *! To measure conveyor belt. Information about the sulphide content of an ore is particularly "useful * if the Srs is to be exposed to a flotation & Ksvorgar-.g to remove various constituents from it. Flotation is often very strongly influenced by the" amount of sulphide contained in the ore. The determination of the sulphide content of the mineral therefore enables "an adjustment of the plot reagents. To a good traction effect"

It is the object of the invention to provide an arrangement awr and simple measurement of the amount of conductive parts, wiö for example SuIfide, in substances such as Ör-ob'ärzen-j, au create.

According to the invention, this object is achieved in that a coil of an oscillator is provided, which feeds the substance

1 0983 17 1 R 1 6

BATH ORIGINAL

.electromagnetic field, r indefinite e- Wreqazim annssfeciiir whose loss factor is dependent on iron -isr Me t-; e leit; f & hlger proportions changes, and that the coil old l & i & Piöh ^ xisen is connected to generate a VerlystfaktorSnderting propo ^ -iionals output signal.

The invention .If IIa below with reference ujssy ei? I /iusführunssbe3.spiel figures showing nMher

■ Fig.-i '. shows a block diagram, de: «· -erflaäöasssj ^ tiäJfcri arrangement-, Pig. 2 shows a perspective view of the material that contains the material that contains the material during the transport process

the invention.
PIg, ρ shows a "block diagram of a SeIa ^ Itwngsanorasung ^ emSS. '

the Er-f Ind «ng.
Pig. 4 shows further details of the SchaltwBgs & not-dmmg. gsmä3-

Fig. 3. .-. ■■ ^: -

PIg. 5 ^ shows the six samples with the help of an inventive. " determined according to the arrangement

The SpKle 1, which is shown in the block diagram in FIG. 1, is connected to the capacitor 2 to form a pair. This resonant circuit is the frequenzberitlmaenda element of an oscillator, further from a ^E £? ^ Erm erstSrker 4, a voltage controlled amplifier 3 "nope einesß S & rom-voltage · *

109831/1616

Converter 6 ordered- * which are linked back to one another are" .

The tension on the torso 3; S vüra ¥ on a tension comparison between 7 constant, which this tension with a compensation tension; vergXeiciit Imae the amplifier 3 in such controls, ά & Β dia spasming E is kept constant "

If too untei-ffueheiider substance is placed in the field of the coil generated as X _# & vjer s in this eddy currents ,. As a result, the host stability or the force Q of the coil is reduced, so that a greater amount of energy flows through the coil. 'PLe-QpBSe of this loss is eic. Hate for the amount of conductive particles in the substance under study. Because the oscillating circuit is in resonasis. the current flowing through it is 5J.1 phase 3 with the voltage E. Since apart from that the voltage B is kept constant, we d * the current in the oscillating circuit is a measure for the quantity-conducting components in the! Material.

In Figs. 2, 5 and 4 is an embodiment of the invention. Arrangement shown _Λ with which a number of attempts were carried out *

109831/1616

Fig. 2 shows a large Helraholts sptils L \ ϊ, ιίϊ, l ~ r®: -. Z- · fiSriaigera Quereemiittj, which is wound on a νί &Ά'ζ v \ ~ .ti ^ llBüh & n core 8. Sin course piece of a 'Fära' ^ h mues. 9 is see through cien. ^: v3rn 8 kinduFahe? strc'sr / =; n <l d-ar. ^ ftfcell ^ * The conveyor belt '· * is over the largest ΛΓι-dI coiner L & sgo of usual. ? "TT ^ s3 ein5 iöhtungen (NIE · .'- '. L.iTS - ^ - ellt) geha \ _t-en; one who hawks the Tres bakery &rioh't'mg is ^one of the' M 'iie the ΙΓβ ^ πί jesooh 8 consists of non-metallic HaterIgI "% .B, Col. ™ cüeri PXasfcik, the conveyor belt 9 is ve: - b i ^4; Un icn ÄsitriebseinrichfciAttgen Cnicht clargssteilt) in f i.ofcting of the arrow moves.?. - On the conveyor belt 9 there is trx-ir.ner 'fabric TI-beispialüweiße "; 3: ρκ ₉ der leifefSiige Är. ^: .ßile r ^ thElt, whose rs ^ s is to be determined, 'ä & r zu under sue i-.ep.öe St;> ff is - i in the middle de :? Spuls ur; ä xiinsat 50 bis. "80 % \ : 1os Ihax * chme £? IS:" - rs a, since the fur on ds-; i sides of the Sr ^ ?. e rlclit is linear, «..

The coil L1 is the formation of the Scfcti.fn-gfcr-sgi.ses 10 of an oscillator KdJ- äeia capacitors Cl ijrxd'Ca> 3: Ä «eden ^; | s. Fig. "* And 4). Per ^ resonant circuit 10 lies .K '.: F." - che; n de ^r * i collector «-nas atö ^ fs Ql m: d der- positive- spa ^ r-iing · * \ ~. Έ, ν is part of eivies -

most oscillator. The Spajnniuvjt am? I; r? -. C ^ 'Ä, the connexion puakt "of the Konclensatoren Cl αχ \ ά: 2 _Ρ iv'ird abgenomaien and" einest Trenn. vrerstSr.csi ⁵ 12 siigegui; » Γ-a-; o «Point B occurring output signal Eai £ ss amplifier *? ' ? i vrVr., S over

romv ^ rSvRrker '- ^; 4 de · «.Sniiti-e ·» s «^ r, yivnxsistors Ql r.ug 10983 1/1616 - -

ORIGINAL

1848855

leads. This VerMmlisng. forms slle Hilök'aipjilijiiässahleife zm?

In the hall

rstäPke ^ 12 fs, Fig. 4} sntl & at a Feloeffekt stor 02 with Oitt'er 16, source -1.8 micl sink 20 and a usual TrsasistOF Q ^, whose Kallektos * äen ".fimlct B Mldet> The St5? oisv © z »St§rfeeF- 1 ^ · enthSlfe sinesi üblißhen ■ v« 3rs: tanker 22 „äer lit © iaeia. Frans! Stop φ -y-ari'imiien. Ist ,.

the ■ Traasist <> 3 * Qi feeds, l ^ rplsohe Baueleraeftfeewert ■

and, · »types are given in Table X at the end of the · BasGhreibimg . , - - ■

The ScliMtagtpeqxisii ?, of the described Osalllatc-rs lies ss awisehen 100 klla - "" and 1 Megahei's «-." _:

The Sohtiiögimgsampiitude- ». s * B ;. Die WeelKsalaps ^ oing at the Kreis 10, is kept constant for one whole range of jerks. als autöäaatisciits'i * Ysrsfel! s? be viewed teaxm. * Eis ^ echselspamnussg & m- "Γ-tmlct B ₅ desi des Yersiiföke ^ s 12 ₃ , is eini · BeriQOoIlg.t.ions lttm® S4 Ku-geföhrtj? the rät fixier 'Vs ^ g le t € verbundan is « Ώ1 & B-iiarnirüsrqvBlX ^ contains e-ine" Zenerd-iode Dl, which is connected via ΦίΒ, οιι W ^ ei ^ tand ElO with the SpaxunmgsQueiXe - ■ ¥ 1st-,. / -

109831/1616

Duroh the Biodsn I> 2.mt & IO takes place- a ^; 8r.Its® "i;.oi" i _f ? S-Caei <; - direction ά-ts output signal aö point 3. KLe fij «-? Mi." Χ - dii r ?? ;; - Biode Bi becomes of this? spanning subt ^^ f.ert. oie! ■ -Jffer-c- ·:!:? becomes aer basts of a transistor 03 sv ^ efua ^ t ,. i; 'r dviii "

you as Vbrsp & nntmg ctlen ': -. The entapreöä.sr.'S © ScJ ^ i'.c.-csbi ^. ^^ zur Awfreehfcerhalfcung dar 8pitsensparm "Aeg- i-tlrd rjlr, FiIfe as. ·· Capacitor .C? -TKid des Wi.äerstandes KIl erreiuiA »

The Ertritter ¹ TUs transistor M5 is with ifera Ki? L. ^; .-3 ^ toi 'fies transistor ζ $ varbunden, while the collector- Ί ^ ά Trans la toi * 3 Q5 via © inen resistor H9 at the voltage terminal + ¥ 15.

The understanding-based amplification controller works to keep the economy constant aa oscillating circuit IO as follows: It is assumed that the conductivity of the clv.rsh the field of the coil 1,1 moving erases increases because of the losses in the Resonant circuit v-ergrSSe ^ a laid'die amplification of the alternating voltage signalS- at the points A- imä E- sioh au-reduce, begins «. Through the ver-pingerv-ng-. Der Sp & iviinng eis point B the '¥ förgleleiisschaltvx, g 2h ζ i? .Gsxllhrte.,' ■ _ ... Sparsnusigj so that the Torspasp-vr.g ar. the base of transistor ■ Q5 goes down. Baduroh becomes the effective impedance ■ this one. Transistor increased. * .- Ea ä r & transistor QA is a current source, the almost-uinabMngJg 'Voss Kallektor-wicierstand supplies an alternating current, is of this current then

109831/1616

-D / .ef-e, - * Sfc ^ cK vfv'groSert the £ ^ annv; rc .-. * N oscillating circuit on the

Since with enlargement ^ it ilen ßclxfliigkreis through the Tr ar s is c? T * QJ /.ixführungic-'i Stresses ck-r- Strom ßureh den Q5 verrir. '^ CnM ;, s? .Nd. the Xndey.ingan vV _; ? p Vbohselspannungs «amplituds fi ·? Ko ^ l ^ ktor cies Tr ^ tieisKore Qß a measure for ßäe Kncleriias of the losses of the resonant circuit 10, vlerä eg: Le3s ~ wise ö ^ .ö ί ^l ίiJ ^ί bg; ■ .3 ⁱ Sί? EaκΓß ^ ⁱ Λί5ί; tβ Is Sciir-inslsreis enlarged.

so geilt df-i / 3; 5a? ii! ing ^ t Koj.lel ^ tor ¹ ά vi TrawjiGtors Q5 back. This . ¹ Se ⁴ JST. , - ^^ ürlioh xrorauSj öai der SoLwij-K ^ reis wirlclicb in Ees? OJiA ^ z, tft, so that 'the Sbrc? ^ a rsitnar' kstrcsn is -; - ur; .i3 ice ±; ii ? BliixdL rnpciie .- '; e en-t. ^ Mlt ^ cie the

14 t> eei -:.: R: hi? 3f. becomes, b3vrili »> cx2 si öse r -; J. see point A ^ nd the collector ¹ ; =. ·! aer Trar-slstören Ql "vnd Q3-a Hsassnv-er« "

hisburß ν cn H: \ 1X «

Dl «4e / jhsÄlf-p ..: iruiis arj JTollslivor cäos ^w rariSis" .or ^ Q5 is used by e-ti'tem, the Tt'omiverst'dmi'sr 12 g. ^: , EJLcb * ^: -iiden Tramiver amplifier 28 ve -j? s'Gl ^: .rkt * iaq Auegatig «? signal of the VarstKrxsri-s SS appears aw collector- -las iransistora Qt ?, the: point ? - _t as an alternating language, the lsi phase kit aens from even gs signal em point B des

109831/1616

in the oscillating circuit? 0 afc, .... =

Since the amplitude of the Wecn ^ lepa.ium? ^ A: - P «ü: t B i *;, .-.,.? - an> 1 / Λ." Wirl that output sign © X?>.:? S, ? un ffe C ε ¹ · - »fr .; ^a!.: i, ii ;;; eb func B öyreh a © Cil ⁱ © ';i;;i.'vii.'...?>chv5i5h1; © P.aolj.äliv?; - "f.5 va« ;; ".. io" i®r ·; 'di ^ with a FiiKkfclciii3ires.'K ⁱ ' -55ri * ': 3r ⁱ ' 3- ^v 'örbu. "? -' ^ ^! J ^ t. Lie Κ« 1ϋ! ι-richt; erso £ ialt «Eg ^ > 0 heads äie negative t-.X ^ r. -;.;. * 'Ilj -. ^ R * iöii WiäerstaKd H15 ^ k ^ <^ i® i: oK: ". Ti ^ e'IßlbFrsI; s ^ »o ^ den vf ^ .cc: r3ts:, d. R16. The fcaiden Ilaiftew wKröert vco Kei3'2nfi: -. R.ür Π31 intss ^ i.er- ^, and irgenfbrelofee Ujnter?; Cii? .Ede £ * ■ .- ■; "aoiyjn iA ** xe * ^5. Vf- svdsn im VerrtnF 32 reinforced xm & vom Mafg & :: - f-; t 3 ¹ ^ ^^ gesiei ^ 'v ;;.!: - ■ Widerptliiide K "to RJ-9 u ^ en.exi zv.f * JmsQta.lxx \ r .. £: Φ: -η KeßT-zrj -'- Sa ^ u «es HeE ^ c ^ Hv-sF The 25wisehsn dsm exit: des Ty ^ im ^ ers * - ^!: - ^ - ·. · "'Ί? 3 we; d the

serves --srar adjustable for the A
φ around "the iftiilpunicfc des;" ^ sf'ss ^ et ^ s 34 fcimrs: ^; '"'- ^ _t . v $ iifi himself

Ers in the field of the coil IA is hot

In the test arrangement: fo. "Sta * id, the Sk ^ J ^ 1.1 ans eirsr · Ρίοΐκ-holts ~ coil of 20.3 G'm adult sep., Sire AnsahI of .Various ore samples were la the interior of the coil ^ obs'achi ·. The measurements were durnhg-? llhvt at different frequencies and the. ■. results were recorded.

10983 1/1616

The measured Srapr-up had a weight of about 9 pounds and were each so sorti-srt * -that the Er & pieces equal SröSe of either l _v "ß era, 2,5 or 5 ora it had. In each were örSßengruppe 6 Samples labeled A to F were present, which had different contents of SudfId. Each sample was brought into the coil ~ \ x & ü the result read on the measuring device 3 ^ Then the frequency was found and the measurement repeated. 6 following frequencies were 14.5 benutztt salt ,. SOO kHsi, 283 m-Iz, 360 ego ₃₅₀₀ kHz and 700 cows. The Keßergebnisse are give in Table II aage- *. The & MeSgorät m, 3'i- readings the Ausin iffiX

After the Versuüheii vmrdsn oils samples analyzed :. The compositions of the samples are shown in Table III. Ftb? the 1.5 cm samples are the results graphically in Pig. 5 shown. On the vertical Aeiise üle -norbierten measured values are plotted wMhrsnd the sulfide content in% is plotted on the horizontal axis. The readings are identified by the corresponding letters designating the associated samples.

It has been shown that the order is not based on Eratei addresses who are Icielner than 0.3-cm. Therefore, for Accurate measurement results are obtained. Particles of this size are eliminated will. . <

10 9831/1616

During a Vsr-look with the arrangement wMe a * \ ^:> r ::: \\ ^! j ri.r- _; · Coil and - parallel to the winding axis in the Ans '-. · And isa 5 * «:"<: rs Spuleni'.ir.faig round steel of 5.3 ο si Durefcn ^ Kser v.nd S' -. 5 ö »· LSr.ge arranged This üimdstahl vergrofertö ni.ü ilvir ^ Riga- · losses dex ^T coil only rrlnimal · This x ^ urcle dx ^ tih klelno Ändeznmgen-components Bauele to dsr ^ Kess?.? aa. ' Ttm ^ .ivsii-y.izXl & iriz -

The arrangement according to the invention is ■ ü'plrieharwsS.st? 2 - >>. ^f Änselge the amount of conductive fractions in. ^ roQlüi & h: ^ Λ £ hux \ ^ -.?; der sioh on einsns kürs6n ⁼ ^ örderOat, d'b & firid <? t, iis kr ^ it; ^ .ed ^ nl-. also on aas conveyor belt '' r ^ i "zlohf / 3t ornaments. The S; y.il <3 vird'ir- .u? i vertical arigeordnat ^ uiio aas material i falls in s-tr.sn -BtS-C ^ ^ u? them

Dia AiiüidtV-ij-g .k & nr * sur Race a = 2s_Sniriäg-ihalt € ..- ve ;;, - "'^ s # £ .-. ■ ore bsiiUvst pearls, dac: sa Flota ^ lor ^ asInriGhtm. ^ * . liiiördör ^ .. is. If the t ^ ijüksriS ore is gi3iehm & fiig ver-tsili au: "'dem short FSrderbaM 9j λο is clas Zerl ^ integpcil xiäer -Sie Änseige des MeBgfrMtes J ^.] d, h. the Leisfählgkel ';ek; S Erso-s "and the Pc'rüeA'g & SG ^ inäi.ic-it" dliefet pr y; fortift -: - c ^ äe ^ ³ Kenge

-Conductive si ^ h through di · «coil fceweg ^ i / kder ¹ shares -" aB sulfide) laid-independent of .aer'FÖrdejcge-sohwindi.fr ^ ei ^ "{this.

noise therefore · scManfcen). The "jesaaitßewicht les wäirirena aas Meßintervailes Help came through the ore requested from the bobbin of separated. Measurement parameters are determined. Baraus lä

1098317161.6

BATH ORIGINAL

BeI.a Flrsv-vj? .Cnspr ^ aea? _p at. -dem -I -si Suf ^^ run ^ des E

come these times? wsrclÄr., tjvs the rier- ^ e aer ssugesetsterx Ee ^ e.? ^; .Titien ir
des Krxes au 3Leb

Let it be dsr- ^ sr iJngswJösenj. dal? nfögiiiitlscihe ^ f & .teriaMi? ji ^:! : i dem ■ iritersr.clin-cr. Substance iiie measurements -iwas bceinfiv-sseri _f this ¹ S ^ ifluS is always small, since the proportion of the srltv ά «-ί substance ve: .-> ett®le- ^s . I? LtiS5 * 5s' is low ^; 'Ud ά & air g; roßei <'Lxsftsyalv; voraai £ d5fi ist- _e feif J «d3rx case wlvd vJis Aiiardiiiing tföl Ie se on the si- t? ntc -; * cucher.de:i material included · V / to P: lg. 5 s "is entiiebnsn, in the investigated" Sr-sprobsn the Ansfeigie cies iieß "ln £ -t; ruiai.iites ir. The represented -Precniensbsreich: '. Γλ wesentilciieir proportiojia.1 the percent, retained of sulfide in the Er» s ^r .

Kin 'Jreqyensbei'eieh ven 100 IcHs to 1 megahertz is suitable; öt »f

It goes without saying that it is necessary to presuppose / dai3 der su xintersiiciieiiöe Substance contains conductive parts that are in the frequency range: a measurable energy from the electromagnetic Record field. Whether the special one to be examined Substance is suitable, can be found through a simple experiment determine.

109 831/16 16

Sm * Improvement of the-Accuracy of- Jtoorclnons? Is usually fcanmerafciarsfcafoilisiert .-- Per-ner sol3. they are stabilized against fluctuations are psriodis & ä aiii these checked v.

Table I.

Component 02 Q5 Type or value 2H2645 (dual) Bstteietn. BIl. Art or Cl, C4, GQ ₉ ClC Q6 53SOO pp 2M5819 BX ₅ R12 ,. never In the". α C5, Co ₉ Cß- Q? ί 3000 pF. .2N5702 550 C5. 470 pp 12 turns Wj, B14 C7 Amplifier 22 0.01> uF Hexus FSL 12 R4 ,, R9-, ■ _ ie ■: k -O CIl Amplifier 52 O, lyuF Pelrchild Mk TOQ R ^ R15 4> 7 iC .V. "F. 012 100 pF - R6, HT 22nd IcQ GlJ 23 pF m - 2.2 k .Xl ^ V +15 volts R ".O 680 'jn -V Diode Dl • 15 volts Ri? TQO Xl Τ »5 V. Zener. ^ Span RlS ^. 2 / Γ k Xl Ql * tion P. 19 9 r 7 03 * -R20 t> j k; .a Ll H21 . «1.5 k yes

;-1; 0 9 8 3Ί ■ / ' % 6 T

t f. ■.; -. '■■ - ■ - · ■.

8AOORiGiNAu

kHz rehearse Tabel B. C. D. E. F. 1.3 om f IX 230 280 430 390 5IO 2.5 cm External cooking voltage in mV 230 340 550 58O 830 145 kHz 5 cm A. 180 460 510 680 860 1.3 cm 90 170 200 - 300 275 355 2.5 cm 60 130 240 ■ jso 370 510 200 kHz 5 cm 120 29O 310 400 500 1.3 cm 60 J02 116 168 160 ■ 205 2.5 om 60 76 I32 176 195 260 285 kHz 5 cm (54 Ιββ 160 180 £ 40 1.3 cm 42 82 90 124 130 ISO - 2.5 om 30th 58 102 142 140 190 360 kHz 5 cm 42 120 122 136 162 1.3 cm 50 54 58 80. 86 100 2.5 om 20th '58 64 88 86 108 500 kHz 5 om 24 70 70 76 100 1.3 cm 20th 38 46 58 .65 76 2.5 eta 16 30th 40 58 60 . 70 700 5 cm 2 12th 50 46 52 70 14th 16 1 ·

109831/161 6

_eA0

Table III

Samples $ Ni % Cu Pe fi S niagastlsobss material in $

A 1.3 era
2.5 cm
5

B 1.3 ob
2.5 cm
cm

C 1.3 ob

2.5 oi
5

D 1.3

2.5 om
om

E 1.3 om
2.5 om
cm

P 1.3 em
2.5 om
ο®

0.78 0.61 0.54 0.4o 0.08 0.03

1.40
1.04
0.56

Iy 28

1.79
1.68

2.52
2.23
2.11

2.48

2.39

2.61

2.70

0.83 1.14

0.67

1 * 79 2.33

1.64

1.71 1.52 1.84

2.33

2.08

20.7 9.2

17.1 6.8 4.5 O _r 4

30.0 17.1

23.2 10.8 "16.1 7.0

33.2 18.9

33.1 19.5 29.9 16.7

41.6 26.2

41.9 23 * q

8 22.8

44.8 26.3

44.3 28.3

46.1 28.3

49.4 31.4 53.4 32.2

49.2 30.0

39, β

.58.9

0.7

57.1 59, e

47.3

68.1

63 * 57.4

69.8 7β, 6 75.7

■ 82.8

74.8 80.2

• 43.60

.27 * 95

18.23

48.22 50, 36

67.28

& r _s

72.4t

7P.7O

80 ^ 63 82 * 72

77.09

8u: bb

10983 1/1616

BATH

Claims (1)

Barringer Research Limited Rexdale, Ontario * Canada (British 57847/66 -prio 24.12, 66 -1663 - 5217) Hamburg, IS. December 1967 Pa t e η t a η s ρ r U ο h e 1. Arrangement for measuring the quantity of conductive items in one Fabric, especially in Brs, characterized in that a SpUIe (Ll) of an oscillator is provided * which the substance (M) an electromagnetic field of predetermined width; suspends and their loss factor depends on the quantity Conductive components Snclert, and that the coil Li. with facilities (12, 28, 30, 32, 34) to generate a loss factor change proportional output signal verburideii 1st, 2. Arrangement according to claim 1, characterized in that dl « Coil (Ll) has a capacitor (Cl, C2} su one Parallelsohwingkreis (10) is interconnected, whose Resonance frequency equal to the predetermined frequency 1st · Arrangement according to claim 2, '"characterized by a arranged in the feedback loop (Ql, 12} of the oscillator Amplifier {14} and through one connected to the resonant circuit (10) automatic gain reXer (24, 26, 05) for Demodulation of the alternating voltage amplitude and - to. one the AC voltage as the oscillating circuit (10) constant change 10983 M 1616 of the stream. 4. arrangement naoh claim 3, characterized in that the Proportional change in the current passed to the oscillating circuit (10) the output signal is. 5. Arrangement according to claim 3 or 4, characterized in that daduroh the amplifier (14) has a phase shift of zero. 6. Arrangement naoh one of the preceding claims, * thereby marked! that the coil (Ll) consists of a Holmholtz Coil consists of * the fabric can be moved through the inner thread is. 7. Arrangement according to one of the preceding claims, characterized in that the automatic gain controller (24, 86, Q5) has a comparison circuit (24) for generating a demodulation signal corresponding to the voltage amplitude at the resonant circuit (10) and a device (26) for generating a contains this detoodulation signal to be compared comparison voltage. 8. Arrangement according to one of the preceding claims, characterized in that that the predetermined frequency is in the range between 100 kHz and 1 megahertz. 109831/1616 .. SAD _Ofi , _{G (NAL} 9 «Method of measuring the quantity of leifcfMMgsr proportions in one Substance using an »arrangement according to one of the preceding claims, characterized in eic line t, fiaö der » Substance (M) the electromagnetic field of the coil (Li) a resonant circuit (10) is exposed, the Spanaungs amplitude at the oscillating circle (10) is kept constant, and that the amplitude of the flowing through the resonant circuit (10). Current measured and compared to that value of the current becomes, which adjusts itself with pale the substance (M). 8u: bb 109 831/1616 b »OBIOINM. Read it e