The Mettler Toledo® JET503C/A Carat Balance is an ultra-precise, legal-for-trade weighing instrument engineered specifically for diamond merchants, gemstone retailers, and jewelry laboratories. This high-performance balance delivers dual-range accuracy to satisfy rigorous weights and measures standards, offering a fine-resolution analytical capability of 101 grams with a readability of 0.1 milligrams (0.0001 g) alongside its standard legal-for-trade commercial configuration of 101 grams by 1 milligram (0.001 g). Its solid metal construction, robust die-cast aluminum casing, and integrated glass draft shield work together to protect delicate measurements from air currents, floor vibrations, and accidental workspace bumps.

Operational efficiency is driven by a vibrant, 4.5-inch color TFT touchscreen display that features an intuitive user interface with large icons for mistake-free reading under bright showroom and laboratory lights. To ensure uninterrupted accuracy and trade law compliance, the balance utilizes Mettler Toledos Fully Automatic Calibration Technology (FACT) to perform autonomous internal adjustments whenever ambient room temperatures shift. The balance is also built to handle complex point-of-sale setups, utilizing a comprehensive connectivity block featuring RS232, a USB Host, and a USB Device port to manage peripheral receipt printers, barcode scanners, and secondary customer-facing displays at the same time.

• Legal-for-Trade Certified: Fully approved for commercial transactions, ensuring legally compliant and reliable measurements for high-value gemstones and precious materials.
• FACT Internal Calibration: Automatically fine-tunes the balances mechanisms using internal test weights to maintain accurate performance across fluctuating workspace temperatures.
• Color Touchscreen UI: Provides a sharp, icon-based 4.5-inch display that simplifies operational navigation and reduces operator reading errors.
• Glass Draft Shield: Features smooth-sliding glass doors to block environmental drafts and stabilize fast measurements on fine carat weight fractions.
• Flexible Weight Unit Conversions: Supports seamless, one-touch switching between essential commercial weight metrics including carats, grams, and pennyweights.
• Advanced Interface Ports: Outfitted with built-in RS232 and dual USB connections to route data smoothly to computers, POS equipment, or labels.
• Dedicated Carat Software: Pre-programmed with convenient built-in applications, including density calculations and totalization, to assist with bulk gemstone verification.