The MDJ-300K Gold Purity Tester utilizes advanced German sensors to determine precious metal purity through density detection. This non-destructive testing instrument quickly identifies genuine precious metals by displaying gold purity percentage, K value, density value, platinum content, silver purity, and other alloy compositions.

Ideal for use in:

• Pawnshops and precious metal recycling
• Jewelry manufacturing and retail
• Banking and financial institutions
• Mining operations
• Jewelry testing centers
• Industrial and research laboratories

Compliant with GB/T1423 noble metal purity determination standards, this instrument requires only two simple steps for accurate measurements without sample binding.

Detects all major precious metals including:

• Gold (Au)
• Silver (Ag)
• Platinum group metals (Ru, Rh, Pd, Os, Ir, Pt)

• Gold K value (1-24K) & percentage content
• Platinum PT value, percentage content, and density
• Silver S value, percentage content, and density
• Other alloy percentage content and density values

• Water temperature setting
• Measuring medium density setting
• Air density setting
• Main and secondary material density settings
• Copper and silver proportion setting (default 7/3)

Measurement process based on Archimedes' buoyancy principle:

1. Measure sample weight in air and press ENTER
2. Submerge sample in water and measure weight
3. Press ENTER to display results (5-20 second measurement time)