Hyuduo Gemstone Detector, High Accuracy Jewelry Tester Pen with Type C

Spec: Item Type: Jewelry Tester Material: ABS Weight: Approx. 160g / 5.6oz Operating Temperature: 10-40°C Product Size: Approx. 158x45x21mm / 6.22x1.77x0.83in Data Cable: Type C Built in Li Battery: , 800mAh Package List: 1 x Jewelry Tester 1 x Connection Cable 1 x Accessory 1 x Instruction Manual How To Use: Gemstone Measurement, Identification 1. Adjust according to the size of the gemstone to be measured. 2. Use the up or down keys on the device to adjust based on the carat weight displayed below the instrument. You do not need to set the carat weight accurately. 3. However, remember: for gemstones (larger than 1.0 carat), turn on 1 green light; for gemstones (0.5 carat), turn on 2 green lights. 4. For small stones (e.g., cut or tapered), activate 3 to 4 green lights (take special care not to touch any buttons during testing). When holding the device, ensure your fingers make contact with the conductive plate on the back (measurements will be inaccurate without this contact). Refer to the manual for additional guidance.

• [PRECISE GEMSTONE DETECTION] Engineered for quick and accurate gemstone identification, this professional tester pen reliably distinguishes genuine gemstones from synthetic stones. It delivers dependable results for both loose stones and set jewelry, as well as precious metal products, making it an essential tool for any jeweler or gem enthusiast.
• [SIMPLE ONE HAND OPERATION] The detector is incredibly easy to use. Simply position the probe vertically on the object and press the switch. There is no need for lengthy waiting periods, as you receive results. This user friendly design ensures efficient testing for both novices and experts.
• [VISUAL AND AUDIBLE ALERTS] This gemstone detector features both visual and audible alerts. When the light illuminates, the device emits a clear sound signal, allowing you to easily distinguish between different stones. The dual alert system ensures you never miss a reading, even in busy environments.
• [PORTABLE AND COMPACT DESIGN] This compact electronic device is designed for easy portability. It fits comfortably in your wallet, pocket, or backpack, making it the perfect companion for jewelers, appraisers, and hobbyists who need to test gemstones on the go anytime and anywhere.
• [THERMAL CONDUCTIVITY TECHNOLOGY] The pen operates by measuring an object's thermal conductivity. For best results, follow the correct testing procedure and avoid using it on unsuitable items like metal, skin, or water. Proper operation guarantees accurate and reliable test results every time.