The Essential Standard for Accurate Gold Purity Analysis

The GK-300 Precious Metal Tester is the industry's most trusted "Basic Model" for determining the purity and karat of gold. Designed for Jewelry Stores, Pawn Shops, and Gold Recyclers, this electronic density meter eliminates the guesswork of buying and selling precious metals.

Using the proven Specific Gravity (Archimedes) Method, the GK-300 calculates gold purity by measuring the sample's density. Unlike acid testing, which can damage jewelry, or X-ray fluorescence (XRF), which is expensive and complex, the GK-300 offers a fast, non-destructive, and cost-effective solution for samples weighing between 0.01g and 300g.

How It Works

The GK-300 determines purity through two simple steps:
1. Weigh the gold piece in the air (normal weighing).
2. Weigh the piece submerged in the water tank.

The internal computer instantly calculates the specific gravity and displays the Karat Value (e.g., 18K, 24K) and Purity Percentage. No calculations or charts are required!

Ideal Applications

💍 Jewelry Appraisal
Verify the karat of rings, necklaces, and bracelets instantly without scratching or applying acid to the customer's valuables.

🏦 Pawn & Loan
Protect your business from fake gold and plated items. Quickly identify "scrap gold" value with scientific accuracy.

⚗️ Quality Control
Ensure casting quality in manufacturing by verifying density (1 to 0.01 g/cm³) consistency.

Key Features & Capabilities

✔
Wide Measuring Range: Capable of weighing samples from 0.01g up to 300g, suitable for everything from light earrings to heavy gold chains.
✔
Comprehensive Karat Display: Directly displays: Lo, K9, K10, K12, K14, K16, K18, K20, K21, K22, K23, K24, and 99.9% Purity.
✔
Adjustable Parameters: Allows for water temperature compensation and user-defined specific gravity settings for special alloys.
✔
Compact & Reliable: Small footprint (218×190×170mm) fits easily on any counter. Includes a calibration weight to ensure ongoing accuracy.

Technical Specifications

Model	GK-300
Capacity / Weighing Range	0.01 g - 300 g
Minimum Weight for Density	5 g (Recommended for highest accuracy)
Density Resolution	0.01 g/cm³
Gold Karat Range	K9 - K24 (plus Purity %)
Display Type	Digital LCD
Power Supply	AC 100-240V (Adapter Included)
Dimensions & Weight	218 × 190 × 170 mm \| 1.54 kg
Optional Accessories	Airtight Windshield, Compact Printer

What's in the Box?

• GK-300 Main Unit

• Water Tank & Sensor Stand

• Calibration Weight (Test Weight)

• AC Power Adapter

• Tweezers

• Thermometer

• User Manual

• Interface Cable

Including standard accessories.

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Gold Tester – Purity Density Tester | GKS-300