DensityScreenScale
The precise and professional density meter.
With the Goldanalytix DensityScreenScales, you have the means to quickly determine the precise density of all sorts of materials. Therefore, the scales are perfectly suited to examine bars, jewellery or coins for their purity and alloy composition. In this way, gold bars with foreign metals of different densities or alloys can be detected quickly: for example bars, coins or pieces of jewellery "stretched" or under-alloyed with silver or copper, which are otherwise very difficult to distinguish from real gold.
Advantages & Features:
- Universal measuring principle - testing the authenticity of gold, silver and platinum
- Compact and affordable density meter
- Valued by jewellers, dealers and private investors alike
- Many customers already believe in the density scales
- Applicable to determine the alloy component of test objects
- Detection of e.g. underalloyed gold coins
Undeceivable when combined!
Combine the DensityScreenScale with the MagneticScreenScale, GoldScreenSensor or GoldScreenPen and you will have a combined testing system that can identify almost all types of precious metal forgeries of coins and bars currently known on the market. For where, for example, materials of the same density as tungsten used for gold forgery cannot be detected with the density scales, the magnetic scales will perform reliably. It also works the other way round: the density scales detect forgeries where materials with similar magnetic properties as the precious metals were used. Together with the CaratScreenPen the DensityScreenScale can help effectively in many cases of jewellery testing.
Frequently asked questions about the DensityScreenScale
If you cannot find your question here, please use the contact form or send us an enquiry directly to gold-analytix@marawe.eu.
This depends entirely on which objects you want to check:
For classic investors (coins and bars), the GoldScreenSensor (also measures through packaging) in combination with a caliper and precision scale is usually sufficient . For bars from 50 to 100 grams upwards, we also recommend the BarScreenSensor, for which the objects must be unpacked. The GoldScreenPen can also be used for smaller investment objects up to approx. 1 ounce.
For gold jewellery, measurement with a combination of CaratScreenPen and DensityScreenScale is ideal. The fineness of gold (carat number) can also be determined with our test acid sets.
As a tungsten detector, the MagneticScreenScale is an alternative to the GoldScreenSensor for gold objects from approx. 1/4 ounce to 250 g. This MagneticScreenScale is a good choice for those who want to focus entirely on gold and do not want to unpack 100 gram bars, for example.
- With experience it takes about 30 seconds to take a measurement and calculate the result.
- Make sure that the scale is located as steady and vibration-proof as possible.
- Ideally, start the device 5-10 minutes before you use it so that it can regulate itself.
- The density scale works most reliably in a stable environment with a room temperature of 20-25 °C. The most important thing is that the temperature remains constant during the time of operation or use.
- Also note that you cannot use the density scale to measure jewellery set with precious stones, as stones falsify the density. Also, do not weigh any substances that react with water, e.g. sodium or potassium, or have a water-soluble layer.
- The test specimen must be dry and clean.
- Remove any capsules and blisters before measuring, otherwise the result will be inconclusive.
- With weakly wetting liquids (e.g. normal water), air bubbles may accumulate on the carrier or the test piece. An air bubble with a diameter of 2 mm already causes a measurement inaccuracy of 4 mg.
The density scale only indicates the weight of the test piece in the water. To calculate the density, you need the normal weight of the piece and the weight of the object in the water. To free you from having to do your own calculations, we provide you with our Excel calculation tool, which does the maths for you. Simply enter your measured values and the density of your piece is calculated.
Basically, density can be calculated by dividing the mass of an object by its volume.
If you have the DensityScreenScale or the bar testing set GAX1000, then you can use our calculation tool for this. To do this, measure the weight in air and the weight in water with the density scale. You can enter these two values into the tool and it will give you the density. In addition, with the calculation tool you have comparative values of some alloys and many pure metals.
If you want to calculate the density yourself, the formula is:
Density [g/cm³] = Air value [g] / (Air value [g] - Water value [g])
Yes, gold has a density of 19.32 g/cm³, but the popular counterfeit material wolfram has a density of 19.30 g/cm³. For silver, which has a density of 10.49 g/cm³, lead-tin or molybdenum alloys with a similar density are often used. Thus, a counterfeit cannot be ruled out with a density measurement alone.
The measuring range of the density scale goes from 0.01 - 2000 grams. This means you can measure small objects as well as bars up to a weight of 2 kg.
Caution: With silver bars over 1 kilogram, the measuring basket may not be large enough, as silver has a lower density than gold and is therefore larger for the same weight.