GOLDANALYTIX Handy Gold Tester Instruction Manual

GOLDANALYTIX Handy Gold Tester

About Goldanalytix / Contact

Goldanalytix, established in 2012, nowadays is the leading provider of precious metal testing methods in Germany. In our team we are working on the development of safe and reliable testing methods for each kind of precious metal. The Gold Screen Pen has been developed and is manufactured completely in Regensburg/Germany. Thanks to the close synergy of analytics know-how and device development, we are always up to date. Due to continuous improvements we achieve and guarantee highest standards of quality.

Do you need support with product data, service assistance or customer service? Feel free to contact us through one of the following channels:

Homepage: www.gold-analytix.com
E-Mail: [email protected]
Phone: +49 941 29020439

We are looking forward to your contact!

Introduction

Congratulations on your purchase of the Goldanalytix Gold Screen Pen. The Goldanalytix Gold Screen Pen is an easy, fast to use and non-destructive testing device for the determination of the electrical conductance of (precious) metal maul dings. Primarily, this device was developed to test the authenticity of precious metal coins and small ingots. The Gold Screen Pen is also suited for the determination of base metals (e.g. for the identification of high-value tin ware or silverware in contrast du zinc counterfeits and silver-plated objects when you want to recycle). An authenticity test or classification of the purity of a piece of jewellery and therefore an information about the carat number is not possible with the Gold Screen Pen (use the Carat Screen Pen instead).

The Goldanalytix Gold Screen Pen quickly gives you a piece of information about the conductivity within seconds. The measuring principle of the Gold Screen Pen is based on an inductive method that allows not only for measuring the electrical conductance at the surface but also up to a depth of 500 µm. The probe´s tip is provided with a very small probe spool that enables to measure the electrical conductance even at very tiny surfaces.

Please read these operating instructions carefully prior to the first use in order to perform measurements properly with the Gold Screen Pen.

Please note: The development of improved counterfeits is the goal of each forger. In order to stay up to date on this dynamic field we recommend you to inform yourself on our website at  www.gold- analytix.com/GoldScreenPenelectronicgoldtester under “Application info”. There you can find the most recent version of the instruction manual.

Scope of Supply

Your Gold Screen Pen set is delivered with the following elements:

In the unlikely event that something is damaged or missing please contact Goldanalytix immediately (for contact data see page 2).

Measurement Principle

The Gold Screen Pen uses the eddy current measurement as its measurement principle. Every metal exhibits a characteristic conductance (unit: Megasiemens per meter [MS/m]), which enables the identification of genuine objects, falsifications or inferior alloys. Due to similar densities, the most used metals for falsifications like tungsten, lead or tantalum usually differ significantly in their conductivity compared to precious metals or their alloys, and corresponding metals and there counterfeit metals (e.g. tin vs. zinc), respectively. Different metals/alloys may nonetheless show the same conductivity.

The inductive testing method uses electromagnetic alternating fields, whose penetration depth depends on the applied frequency and the electrical conductance of the testing sample. The frequency of the Gold Screen Pen was adjusted in a manner, that chemically or electroplated metal layers of falsifications are totally pervaded. The penetration depth depends on the conductance of the testing sample and ranges from approximately 150 µm (pure silver), 250 µm for pure gold (middle conductivity range) and up to 500 µm for gold alloys (e.g. Krugerrand, lower range).

The sensor technology as well as the electronic unit is situated inside the compact casing of the battery-powered device allowing the use of the Gold Screen Pen as a mobile device.

Safety Instructions for optimal Measurement Conditions

Please be aware of the following hints while performing measurements:

• Please only use the enclosed power supply unit (charging time approx. 4 hours when empty, no charging symbol is displayed while charging). Inferior products can cause incorrect measurements or damage the internal electronic components of the GoldScreenPen.
• Please do not open the device or probe tip. By opening either one the device can take significant damages, which are not covered by the warranty. Repair costs need to be paid by the user.
• Do not use the testing device in the presence of explosive gases, vapours or dust or in wet environment.
• Please operate the device at room temperature and not in proximity of heat sources (e.g. fan output of your laptop). The measured values are temperature dependent and linearized by best fit algorithms, but the best accuracy is achieved at room temperature.

Operation and Display Elements

④

| Conductance scale O – 62 MS/m, represents conductance graphi cally. No direct statement about authenticity of testing sample.
⑤| Display ,,Ready” : You can start with your measurement
⑥| Advice on low battery: This advice is shown after switching on the device only!
⑦| Advice on ferromagnetic specimen: Ferromagnet ic objects cannot be measured!
⑧| Advice on metal contact of the sensor tip while starting process. Please remove the metal from the tip.

Table 2 – Description of operation and display elements

Starting the Device and Performing a Measurement

Starting the device:

Please push the ON button ② for switching on the device. After a short delay which is caused by an auto calibration process the display shows that the Gold Screen Pen is ready to use (⑤). Please be aware of removing metallic objects from the sensor tip while starting the device. The advice ⑧ reminds you.

Performing a measurement:

Please hold the pen´s tip perpendicular to the surface of your testing object in order to achieve accurate results (see Figure 2). Please do not push the tip too powerful on the surface or on sharp-edged mintages because of potential damage or destruction of the tip´s spool. Using gentle pressure like writing with a pen is totally sufficient. The device performs two measurements per second giving the resulting conductance with an accuracy of one decimal ③. Due to the measuring interval and the user-related change of the position of the tip during the measurement the given conductance value will not remain constant.

After removing the tip from the surface the device will perform an intermediate calibration.
Therefore, we recommend waiting for few seconds in between two measurements in order to enable the device to calibrate itself.

Important information:

The sensor tip is sensitive! Touching the object slightly with it is completely sufficient. Smashed sensor tips are not covered within our warranty and respective reparations have to be paid by the customer.

Conditions for optimal results (see Figure 2):

• The device is also able to determine the conductance through thin blisters and films (maximum thickness ca. 0.25 mm). Hereby, the accuracy will decrease. Nevertheless, best results will be achieved with direct contact of the tip to the metal.
• The contact surface should at least cover the sensor tip (ca. 3.5 mm) in order to guarantee an accurate measurement.
• The contact surface should be as plane as possible (we recommend an area with little or even without mintage) and not strongly curved.
• Please hold the tip perpendicular to the testing sample, not diagonally.
• The thickness of the sample has to be bigger than the penetration depth, i.e. at least 0.5 mm.

Evaluation and Interpretation of the Results

The following chapter gives you hints for the interpretation of the established conductivity. Please keep in mind that this device only shows the conductivity of the object and deduces from that, which material it could be. The Gold Screen Pen only measures the electric conductivity. This is why we additionally recommend in case of doubt the use of a conductivity value reference table (see annex of the manual). The following factors however can distort the results

• Scratches
• Blisters & bars / other packages
• Temperature effects (temperature of the device differs from the one of the measured object, etc)
• Striking on coins or bars
• Bends and deformations
• Uncommon coins or impurities with ferromagnetic material

PLEASE   NOTE: A correct conductivity value is no guarantee that your object is not a fake. The Gold Screen Pen is a penetrating eddy current measuring device and no independent fake
detector. The reason is that an alloy with the same electrical conductivity as gold can definitely
be produced (e.g. copper alloys), but in this case the coins’ or ingots’ dimensions or weight will not be correct. We therefore recommend turning to several examination methods to exclude counterfeits with certainty.

In case of coins, we recommend the following procedure:

Step 1 : Establish the weight with a precision balance – does it correspond with the set value? In many cases, fakes are already detected here.

Step 2: Compare the dimensions (thickness and diameter) with the set values of the desired coins with an electronic slide gauge (can be purchased for a reasonable price in our online shop or at specialist shops) or stencils.

If 1 and 2 correspond exactly to the set values (can be found on the Internet, e.g. on the websites of the producers), it can only be a fake with material of the same density – in case of gold, these are for example metals like tungsten or uranium (the latter can be ruled out for obvious reasons) or in case of silver, e.g. mixture of lead and tin or even molybdenum.

Step 3: Detection of lower alloys and counterfeits made of e.g. molybdenum, tantalum or tungsten, tungsten alloys, tungsten carbide, brass, copper and so on up to a penetration depth of about 150 µm (in case of pure silver), 250 µm (pure gold) and up to 500 µm (.916 gold, e.g. Krugerrand) with our Gold Screen Pen.

There is no individual non-destructive method which can give you a reliable answer to whether the tested precious metal is genuine or not. If anybody tells you something else, this person is definitely not honest or does not know it better! The reason is that any physical property (i.e. conductivity, density, sound, etc.) of any precious metal can often be imitated relatively easily with certain materials. However, materials – especially for precious metals – which are identical in two or more properties, are significantly more difficult or almost impossible to find (if, as seen above, the density corresponds, there are only a few possibilities left – and those are e.g. identified by their current conductivity). This is also true vice versa: In case of having the same conductivity, the density for example will be different. We know for instance about PAMP-gold bars made of a copper-steel alloy plated with a very thin layer of gold leading to an almost identical conductivity like pure gold. These counterfeits must be examined thoroughly with other methods (e.g. by their differing thickness or width).

Please also have a look at our website www.gold-analytix.com in order to get further information about the correct procedure with the non-destructive tests of precious metals. Absolute certainty, especially about the exact composition, can only be achieved with a destructive, total chemical analysis.

Please don’t be deterred by this information – the Gold Screen Pen detects most of the current counterfeits of bullion metals if you compare the conductivities. For example, the current frequently and very well faked ¼, ½ and 1 ounce tungsten bars and coins are easily identified. We want to point out the conscientious handling of the interpretations of the results.

Irregular and immobile objects: Another big advantage of the Gold Screen Pen is the opportunity to measure irregular shaped / individual, metallic objects. One typical example is the differentiation of high-quality and silver plated cutlery: High-quality silverware (hallmarks 800- 999, i.e. 80-99.9% silver content) can be easily distinguished from hotel silverware of classes A (hallmarks 90/100/110; basic material is nickel silver, brass or other copper alloys) and B (e.g. hallmarks 60 or 80; different basic materials) due to their significant higher conductivity range (800: ca. 42 MS/m, 999: ca. 62 MS/m; vs. 5-25 MS/m for hotel silverware; see tables in the appendix). The Gold Screen Pen as a mobile device enables a punctual measurement of immobile, metallic specimen like heavy and large scrap metal objects at scrap yards.

A further field of application is the distinction of high-quality pewter and cheap imitations of zinc.

Important Hints for Measuring with the Gold Screen Pen

Disruptive factors: We recommend dropping all your mobile devices (i.e. smartphone, mobile phone or flash drive with wireless access) at least 1 m far away from the testing device due to the inductive eddy current principle of the device. The relatively high radiation density which is especially high during connection setup can lead to false measurements. The latter can be recognized by strong deviations or oscillations of the value. After restarting the device can be used without further restrictions. Wireless LAN / Wifi or Bluetooth do not influence the measurement.

IMPORTANT: Always wait 2 to 3 seconds in between the respective measurements, in order to let the device calibrate itself. If you lay the coins onto the device to quickly, it may happen that the values are distorted. This auto-calibration process can take a bit longer sometimes. Should you be unsure whether the displayed value really is the correct one, take the object off the device and wait some seconds more before putting it on again.

Please keep the temperature of the device and coins in mind – ideally, they should be about 22 °C (+/- 2°C) – the conductivity values depend on the temperature. So also make sure that you do not hold the coins and bars in your hand for too long before performing the measurement, as they would be too warm and the measurement results can therefore be false.

Penetration depth of the Gold Screen Pen: Depending on the conductivity of the material, the Gold Screen Pen penetrates into different depths into the precious metals. In case of highly conductive materials like silver (conductivity = 61 MS/m), the penetration will not be as deep as in case of metals of the middle zone (.999 gold [45 MS/m] or .986 gold [about 25.5 MS/m]) and the low conductivity zone (e.g. Krugerrand alloys at 9.7 MS/m). In case of silver, you can expect about 150 µm penetration depth, whereas in case of the Krugerrand alloy the penetration depths is up to 500 µm (0.50 mm). However, this is relatively deep, if you keep in mind that most gold- or silver-plated layers are only 10 to 60 µm thick. It depends on these numbers, up to which size the precious metal objects can be measured. Generally speaking, you can measure1 kg silver bar with this device – there will be a conductivity value. However, in case of such big objects, it is very possible that the forgers apply much thicker precious metal layers around the fake core. Then the GoldScreenPen will not give you a reliable answer. “Smaller” objects are normally penetrated completely by the magnetic induction field – in case of bigger ones (from 1 ounce on, according to their geometry), forgers would have to use very little amounts of fake material in order to not get caught. It is questionable if this is lucrative for them – however, it is possible that from this size onwards, there are objects with a deeper core. This is why you should always use more than one suitable testing method, especially for objects of over 1 ounce. In case of bigger bars (from 50/100 grams), you should definitely use ultrasound as well (Goldanalytix Bar Screen Sensor).

Testing objects should exhibit a thickness of at least 0.6 mm to 1 mm ; blisters can have a
thickness of up to 0.25 mm. Not every material shields in the same manner. If there are metallic components in the supposed plastic package, no reliable or convincing measurement can be guaranteed. Our test measurements with e.g. NGC packages have shown that they are too thick because there are several millimetre air gaps between the object and the packaging.
Unfortunately, this kind of package cannot be measured. The striking and the height of the edge
(especially in case of coins) can lead to a deviation, even though it is not a fake. Always put all
your objects with the front- and the backside on the device.

Old coins / bars (“old” defined as before World War II) and especially objects of the 19th century may partly differ in their composition. That means that the gold content is right but the composition of the remaining amount of some coins deviates. Concerning .900 gold, those coins should consist of 900 parts gold and 100 parts copper. However, due to non-optimized production processes and analysis conditions those coins are contaminated with foreign metals which change the conductivity. Moreover, the gold used for producing these coins has not been 100% pure so that further impurities got into the molten metal and finally into the alloy.

Alloy impurities: The range of possible impurities and their consequences cannot be comprehended entirely. With our testing experience we found, that some Vrenelis 20 CHF sometimes have 10 to 20 times higher iron content than their cleanly produced “colleagues” of the same year. The gold content was correct in all of those coins (90%), however besides copper and silver some coins showed significantly higher iron contents in XRF-analysis. This means that Vrenelicoins from 1922 sometimes were minted inaccurately and that not all components were controlled properly. Through its highly accurate measuring system the Gold Screen Pen recognizes those impurities, which leads to lower conductivity values for the measured coins (iron lowers the conductance of these kinds of alloys). In conclusion to this, old coins that fall into this category are not to be considered as fake but rather as variations of the coin with frequent ferromagnetic impurities (iron or nickel). In this case we highly recommend combining more methods like a density test, gold testing acids or a XRF-test, to gain more data and find out if the coin contains the right amount of gold (or less, which happens quite often, too) or if its “just” one of the described cases. A .900 gold coin of course stays a .900 gold coin, even if instead of the other 100 parts of copper there is 98 parts of copper + 2 parts of iron. The gold content is therefore not reduced. The conductivity value can therefore change and makes the interpretation of the results more difficult. In case of strong ferromagnetism, the Gold Screen Pen will show “ferro. metal!” and a conductivity value of “L=n.a.”, which normally indicates a counterfeit.

Fine silver coins with a silver content of .9999 (Maple Leaf or Kangaroo) feature a higher conductivity value than .999 coins. This is due to the fact that even this one per mille of foreign metal within the .999 gold coins can cause a decrease in conductivity (it of course depends on the kind of impurity, in case of copper, the effect is not as strong as in case of nickel or iron). This sensitivity has a particular influence on the aforementioned deep stir kings or high edges. That’s why .9999 silver coins and bars, respectively, are in the range of 62 to 64 MS/m – these values are beyond the set value of silver, but because of the measurement configuration, this is no reason to be worried about.

Special case Krugerrand silver: Our tests have shown that the .999 silver coins result of about 55 and 59 MS/m are also an indication of a genuine material. This also applies for the “Owl of Athens” and some “Tokelau” coins.

This effect is particularly strong for silver coins with a purity of less than 958. This is why that,
especially for typical commemorative silver coins, it is not possible to establish the silver content with the Gold Screen Pen. It rather shows you that the conductivity is plausible for silver (>30 MS/m) and the dimensions and the weight have to be examined very thoroughly.

Medals and jewellery can not be tested successfully by measuring the conductivity. Even if the piece is completely contiguous and covers the entire measuring field, the alloy is not known in detail. In the best case you know the gold content, however all other components of the alloy will have unforeseeable influences on the conductivity. If you want to test jewellery, we recommend our Carat Screen Pen that is able to establish the jewellery alloys’ gold contents.

Particularities of the 5 DM commemorative coins of the years from 1979 (Otto Hahn) to 1986 (Frederick the Great): This series of commemorative coins has a weight of 10.0 g (previous years had 11.2 g) and consists of a copper-nickel alloy with nickel core (previous years had silver 625). These coins show a conductance of about 2.4 MS/m (nominal value of silver 625 is of about 47.0 MS/m).

The Gold Screen Pen is a perfect device for the establishment of the conductivity values of metals and genuine precious metals – but in the end, you are the one responsible for your final transactions.

We therefore do not assume any responsibility for any financial losses that result from the use of the Gold Screen Pen.

An absolute secure determination can only be provided by a total chemical analysis. The Gold Screen Pen can only show you which conductivity value the tested material exhibits and which metal / which alloy it MIGHT be. We recommend combining several methods for maximum certainty. Please also have a look at our website www.gold-analytix.com/knowledge.

A1. Overview of Conductance of Common Alloys of Precious Metal Bullions

Designation| Type| Conductance [MS/m]| Tolerance range conductivity| Fineness [%0]| Density [g/ cm 3]
---|---|---|---|---|---
Gold 999| A| 45.0| 43.5-48.4| 999.9| 19.3
Gold 995| B| 35.2| 34-36.5| 995| 19.2
Gold 986| B| 26.5| 25-29| 986| 19.0
Gold 916 (A)| C| 9.7| 9.5-10| 916| 17.5
Gold 916 (B)| D| 11.1| 10.8-11.4| 916| 17.8
Gold 916 (C)| E| 11.8| 11.5-12.1| 916| 17.8
Gold 900| F| 8 . 9| 8 .5 -9 .4| 900| 17.2
Silver 999| G| 61.0| 59-64| 999.9| 10.50
Silver 958| H| 52.5| 52-55.5| 958.4| 10.41
Silver 925| I| 51.0| 49.5-52| 925| 10.37
Silver 900| J| 50.2| 49.5-52| 900| 10.3
Silver 835| K| 48.5| 48.5-49.5| 835| 10.17
Silver 625| L| 47.0| 46.4-48.5| 625| 9.8
Type A| Investment gold bars (Degussa, Umicore, Heraeus, Agosi etc.), Vienna Philharmonic, American Buffalo, Kangaroo Nugget, Maple Leaf, China Panda, M exico Libertad, Australian Lunar, coins Germany (100 marks collector coins etc.), UK Gold Britannia (since 2013), Spain 5000 to 80000 Pesetas
---|---
Types| Please note: The target value is a compromise between the actual target value of the 986 alloy for objects thicker than 1 mm (25.5 MS/m) and the 1&4 ducat coins Austria and their restrikes (27-29 MS/m), which are almost exclusively used in practice and are very frequent – these are special because they are very thin (0.71-

0.75 mm) and therefore below our regular minimum requirement of 1 mm.

Type C| South Africa Krugerrand, UK Gold Britannia (1987-89), Canada 100 dollars, Turkey 100 piasters, Australia 200 dollars Gold Koala, UK Sovereig,ns Chile 5 pesos (1895-1980), 20 pesos (1896-1917), Peru Libra (1898-1969),

Peru 50000 & 100000 Soles (916 Au+ 84 Cu)

Type D| American Gold Eagle from the US Mint since 1986, nominal value in US doll ars (916 Au+ 54 Cu+ 30 Ag)
Type E| UK Britannia (1990-2012), 916 Au+ 42 Cu+ 42 Ag
Type F| Germany Reichsmark, Austria Crowns Emperor Franz Joseph until 1915 & restrikes, Greece Drachma, Austria Babenberger, Austria Florin, Swiss Vreneli (10-100 FR, 1897-1949), Netherlands Wilhemina, France Marianne/Napoleon/Republic, Italy Umberto I, Vittorio Emanuele II, Denmark Frederik VIII, Belgium Albert/Leopold II, Russia Ruble Alexander III/Nikolaus II, Russia Tscherwonetz, Gold Liberty Head US / Double Eagle, Chile Pesos (exceptions see type C), Mexico Centenario, Peru 5 to 10 Soles (1956-1979), Spain 10 to 100 Pesetas
Type G| Modern bullion coins: Canada Maple Leaf, Austria Philharmonic, American Silver Eagle, Australian Koala / Kookaburra, UK Britannia Silver (from 2013), Armenia Noah’s Ark, China Panda, Lunar, Mexico Libertad (from 1996)
Type H| UK Britannia Silber (1997-2003)

Type
l+J

| Austria Maria Theresia Taler, lot s of medals, 10 € commemorative coins 2002-2010 and 20 € 2016-today, values are only valid for 900 and 925 silver or copper alloys & coins after 1945, older coins sometimes consist of silver- nickel alloys – these are 35-38 MS/mI
Type K| Latin Monetary Union, francs, lire,etc.
Typel| OM & € commemorative coins BRO e.g. 5 OM 1953-1979, 10 OM 1987-1997 & 10 € 2011-2015

A2. Overview of Conductance of Common Alloys of Jewellery Metals

Precious metals| electr.
conductivity
[MS/m]| Density
[g/cm³]
---|---|---
Platinum 999| 9 .1| 21.45
Palladium999| 9.3| 11.99
osmium| 10.9| 22.59
Ruthenium| about 14.1| 12 .37
Rhodium (sintered)| 18.5| 12.38
Iridium| about 19.7| 22.56
Foreign metals and alloys| electric
conductivity
(MS/m)| Density
[g/cm³]
Copper (pure)| 58.0| 8.96
copper alloys| 41•57| Depends on the alloy
Aluminium (pur’e)| 36.5| 2.7
Brass| 13,.33| abo ut 8.5
Magnesium| 23| 1.74
Molybdenum| 19| 10.2
Alumitlium alloyS| 15.9-30.5| Depends on alloy
Tungsten (pure)| about 18 . 8| 19.3
Tungsten alloys| 20-28| Depends on alloy
Zinc| 17| 7.1 4
Tin| 7.9| 7.3
Chromium| 7.8| 7.19
n ntalum| 7,6| 16.6
Lead| 4.8| 11 .34
Nickel silvet| 3.2,-5 7| about 8.1 – 8,7
Antimony| 2A| 6.68
Tungsten (sinte.r’ed)| <2| about 19.3
Titanium| 0.5-2.5| 4.45
Bismuth| 0,9| 9.8
Iron| Ferromagnetic| 7.87
Nickel| Ferromagnetic| 8 . 9
Cobalt| Ferromagnetic| 8 .9

More non-destructive Gold-Testing Devices by Goldanalytix

Gold Screen Sensor

The Gold Screen Sensor allows you to test quickly and easily the genuineness of precious metals – even through capsules, blisters and plastic films with a thickness of 3 mm. You can measure small coins of about 10 grams and bigger coins and ingots up to 50 grams.
www.gold-analytix.com/goldscreensensor

Ultrasound Scanner – Bar Screen Sensor

The BarScreenSensor is one of the most important measuring instruments for testing the authenticity of gold bars (and other precious metal bars). The ultrasonic measurement allows complete penetration of all common ingot sizes of more than one ounce and detects inclusions of foreign metals at differing sound speeds.
www.gold-analytix.com/ultrasoundscannerbarscreensensor

Carat Screen Pen

The Carat Screen Pen allows you to establish the fineness of gold (number of carats) of jewellery or any other gold-bearing object within seconds. Thanks to the elaborate measurement design the investigation of almost any gold- bearing object is possible. Additionally, the handling of the device and the visualization of the results are intuitive.
www.gold-analytix.com/caratscreenpen

Magnetic Screen Scale

You can easily identify many counterfeits with the Magnetic Screen Scale, especially the ones made from tungsten. The strong magnetic field of the device penetrates the ingot or coin without damaging it. Tungsten is detected up to 3 mm beneath the gold plated surface!
www.gold-analytix.com/magneticscreenscale

Customer Support

Goldanalytix ist eine eingetragene Marke der/ a registered trademark of
MARAWE GmbH & Co. KG
Donaustaufer Str. 378, Gebäude 64/ Building 64
93055 Regensburg
Amtsgericht – Registergericht – Regensburg
HRA 9148, Sitz: Regensburg
Persönlich haftende Gesellschafterin/personally liable partner:
MARAWE Verwaltungs GmbH, Sitz: Regensburg
Amtsgericht Regensburg HRB 14591
Geschäftsführer/Managers: Dr. Jonas Mark, Dr. Peter Raster, Dr. Stefan Weiß
Tel.: +49 941 29020439
Fax.: +49 941 29020593
E-Mail: [email protected]
www.gold-analytix.de

References

• Gold tester, gold testing machine and precious metal tester | Goldanalytix.com - Gold Analyzer
• Gold tester, gold testing machine and precious metal tester | Goldanalytix.com - Gold Analyzer
• GoldScreenPen - Electronic gold tester | Goldanalytix.com - Gold Analyzer
• GoldScreenSensor | Goldanalytix.com - Gold Analyzer
• Knowledge of gold and silver counterfeiting | Goldanalytix.com - Gold Analyzer
• MagneticScreenScale | Goldanalytix.com - Gold Analyzer
• Ultrasound analyser - BarScreenSensor | Goldanalytix.com - Gold Analyzer
• Goldanalytix - Goldprüfgeräte & Gold Tester - Echtes Gold erkennen & Silber testen | Goldanalytix.de-Online-Shop
• Goldanalytix - Goldprüfgeräte & Gold Tester - Echtes Gold erkennen & Silber testen | Goldanalytix.de-Online-Shop
• CaratScreenPen | Goldanalytix.de-Online-Shop
• GoldScreenPen | Goldanalytix.de-Online-Shop
• GoldScreenSensor | Goldanalytix.de-Online-Shop
• Magnetwaage - MagneticScreenScale | Goldanalytix.de-Online-Shop
• Ultraschallanalysegerät - BarScreenSensor | Goldanalytix.de-Online-Shop
• Wissen zu Gold- und Silberfälschungen | Goldanalytix.de-Online-Shop

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