The PG-DM1 Gold Density Meter is a precision digital density balance designed for gold, silver and other precious-metal density testing. By measuring sample weight and liquid-displacement volume, the instrument calculates the density of a solid sample, which can then be used as an important non-destructive screening method for assessing gold purity and identifying variations in precious-metal composition.

Product Overview

The PG-DM1 Digital Gold Density Meter combines a precision balance with a liquid-displacement density measurement system. It is particularly useful for jewellery manufacturers, bullion dealers, gold testing laboratories, refiners and quality-control departments that need a rapid method for evaluating precious-metal samples.

For gold testing, the instrument determines the density of the sample in g/cm³. Since different gold alloys and other metals have different densities, the measured density can be compared with an appropriate reference value to help assess the likely composition or purity of a sample.

The system supports testing of regular and irregular solid samples, including jewellery pieces, coins and other precious-metal objects. It can also accommodate floating samples using the appropriate accessories.

Important Gold Testing Note

A density meter does not directly measure gold purity in karats or percentage. It measures density. Gold purity can be estimated or screened by comparing the measured density against appropriate reference values, but results can be affected by alloy composition, hollow construction, stones, cavities, plating and other materials.

For definitive commercial purity certification, density testing should be used alongside an appropriate recognized assay or analytical method.

Key Features & Benefits

• Designed for gold and precious-metal density testing

• 0.001–99.999 g/cm³ density range

• 220 g weighing capacity

• 0.001 g / 1 mg weighing resolution

• Suitable for gold jewellery, coins and solid precious-metal samples

• Measures regular and irregular solids

• Automatic density calculation

• Supports floating-sample measurement

• 4.5-inch touchscreen

• German load cell

• Stores up to 100 measurements

• RS232C interface

• Useful for rapid gold-purity screening and quality control

4. Technical Specifications

6. Suitable For

• Gold jewellery manufacturers

• Jewellery testing laboratories

• Gold dealers

• Bullion dealers

• Precious-metal traders

• Gold refiners

• Jewellery quality-control departments

• Precious-metal recycling businesses

• Assay laboratories

• Goldsmiths

• Research laboratories

• Precious-metal inspection facilities

Important

Hollow jewellery, stones, cavities, trapped air, plating and mixed-material construction can affect density measurements. Such factors should be considered when interpreting a gold-density result.

Interpreting Gold Density

The measured density should not automatically be converted into a gold purity percentage without considering the sample's alloy composition and physical construction.

For example, a jewellery item containing stones, hollow sections, solder, cavities or other metals may produce a density value that does not correspond directly to its stamped karat value.

10. FAQs

1. Can the PG-DM1 test gold purity?

It can be used for density-based gold purity screening. It does not directly chemically assay gold purity.

2. Does it display gold purity in karats?

The instrument measures density. A density result can be compared with suitable reference values to help assess apparent gold composition, but the instrument should not be represented as directly measuring karat purity unless a validated conversion method is specifically established.

3. Can I test gold jewellery?

Yes. Gold jewellery can be tested provided the item is within the instrument's weighing capacity and is suitable for immersion.

4. Can it test gold coins?

Yes, solid gold coins and similar precious-metal objects can be tested using the density measurement method.

5. What is the density range?

The specified density range is 0.001–99.999 g/cm³.

6. What is the weighing capacity?

The maximum weighing capacity is 220 g.

7. What is the weighing resolution?

The balance provides 0.001 g / 1 mg resolution.

8. Is gold testing destructive?

Density testing is generally a non-destructive physical measurement, although the sample must be immersed in a suitable liquid.

9. Can hollow gold jewellery be tested?

It can be measured physically, but the resulting density may not represent the density of the gold alloy itself because hollow construction changes the overall density.

10. Can jewellery containing gemstones be tested?

It can be measured, but gemstones and other non-metallic components will affect the overall density. The result therefore should not automatically be interpreted as gold purity.

11. Can it test silver and other metals?

Yes. The density measurement principle can be applied to other compatible solid materials, including precious and industrial metals.

12. Is density testing enough to certify gold purity?

No. Density testing is best considered a screening and quality-control method. Formal purity certification may require an appropriate assay or analytical technique.