
The Mettler Toledo® JE703C/A Carat Balance is a high-capacity, legal-for-trade precision instrument engineered specifically for high-volume diamond wholesalers, gemstone importers, and assay offices. Expanding on the structural performance of the JE line, this balance offers a larger maximum capacity of 700 carats (140 grams) to comfortably accommodate bulk gemstone parcels, extensive layout trays, and heavy mineral specimens. It achieves an ultra-fine standard resolution of 0.001 carats (0.1 mg) powered by Mettler Toledos signature Monobloc weighing cell, which provides exceptional measurement ruggedness and thermal stability against changing conditions on a busy showroom floor.
To streamline intensive daily handling, the JE703C/A focuses on rapid execution, clocking a fast 2.0-second stabilization time to keep inventory workflows moving without delay. Rather than using a complex touchscreen, it features a traditional, angled backlit LCD display with extra-large digits, optimizing legibility under the overhead halogen spotlights typical of retail counters. The unit relies on a one-touch internal adjustment mechanism that uses internal weights to recalibrate the balance at a single keystroke. Furthermore, it can be powered by standard AA batteries in addition to the standard AC adapter, giving jewelry professionals the unique flexibility to operate fully certified, legal-for-trade inspections at off-site purchasing events, pawn clinics, or remote trade shows where a main power line is inaccessible.
| Model | JE155DUG | JE503C/A | JE703C/A | JE1103C/A |
|---|---|---|---|---|
| Capacity x Readability | 210 x 0.1 ct 760 x 1 ct 42 g x 0.01 mg 152 g x 0.1 mg |
505 x 0.001 ct 100 g x 0.1 mg |
700 x 0.001 ct 140 g x 0.1 mg |
1103 x 0.001 ct 220 g x 0.1 mg |
| Legal for Trade | - | NTEP #12-105A3 - Measurement Canada AM-6081 | ||
| - | Class I | Class I | Class I | |
| 500 x 0.01 ct 100 g x 0.001 g |
700 x 0.01 ct 140 g x 0.001 g |
1100 x 0.01 ct 220 g x 0.001 g |
||
| Repeatability (Typical) | 0.02 mg | 0.08 mg | ||
| Minimum Weight (U=1%, k=2), typical | 4 mg | 0.016 g | ||
| Settling Time | 5 seconds | 3 seconds | ||
| Adjustment Type | Internal | |||
| User Interface | LCD Backlit Display | |||
| Balance Model (Carat/Gold) | Carat/Gold | Carat | Carat | Carat |
| Connectivity | PC, Printer, Secondary Display, Wireless Adapter | |||
| Weighing Pan Diameter | 80 mm | 90 mm | 90 mm | 90 mm |
| Dimensions (HxWxD) | 279 mm x 344 mm x 210 mm | |||
| Connectivity Ports | RS232 | |||