EJ Newton Series Portable Balances
The EJ Newton Series delivers affordable precision for students, researchers, and industrial users requiring convenient milligram measurements. With thousands of units deployed in laboratories and production facilities worldwide, this proven balance series offers reliable weighing performance backed by a 5-year warranty. These portable balances feature standard functions typically found in balances costing twice as much, making professional-grade weighing accessible across industrial, pharmacy, and educational settings.
Key Capabilities
- Gravity correction
- Accumulation M+ Function
- GLP/GMP/GCP/ISO Compliant
- Auto Counting Accuracy Improvement ACAI
- Adjustable response characteristics
- Display Hold
- 7 units-of-measure, percent weighing, counting and density (specific gravity) functions
- Clear LCD display with 16 mm high characters and backlight
- Display update: 10 times per second
- STABLE, NET, and ZERO indicators
Design Features
- 127 x 140 mm stainless steel weighing pan for EJ-1200 to EJ-6100
- 110 mm round pan for EJ-610 and below
- 4 leveling feet with level bubble
- Draft shield with anti-static coating (standard on EJ-123 and EJ-303)
- One-touch operation keys: PRINT, SAMPLE, RE-ZERO, ON:OFF, UNITS
- Security slot
- Calibration switch cover (bottom)
- Auto power-off function
Power Options
Dual power capability provides flexibility for laboratory and field use. Units operate on included AC adapter or 4 x AA size dry-cell batteries, delivering approximately 70 hours of operation with backlight off using alkaline batteries.
Getting Started
The EJ-303 and EJ-123 models make milligram measurements simple:
- Plug-in and warm-up the balance
- Level the balance by adjusting the feet
- Start weighing
Units of Measure
N, g, oz, lb (select models), ozt (troy ounce), ct, dwt, GN
Model Selection
| Model |
Capacity |
Readability |
| EJ-123 |
120 g |
0.001 g |
| EJ-303 |
310 g |
0.001 g |
| EJ-120 |
120 g |
0.01 g |
| EJ-200 |
210 g |
0.01 g |
| EJ-300 |
310 g |
0.01 g |
| EJ-410 |
410 g |
0.01 g |
| EJ-610 |
610 g |
0.01 g |
| EJ-1202 |
1200 g |
0.01 g |
| EJ-3002 |
3100 g |
0.01 g |
| EJ-1500 |
1500 g |
0.1 g |
| EJ-2000 |
2100 g |
0.1 g |
| EJ-3000 |
3100 g |
0.1 g |
| EJ-4100 |
4100 g |
0.1 g |
| EJ-6100 |
6100 g |
0.1 g |
Performance Specifications
| Model |
Repeatability (Std. deviation) |
Linearity |
Calibration Weight (factory setting) |
| EJ-123 |
0.003 g |
±0.003 g |
100 g |
| EJ-303 |
0.003 g |
±0.003 g |
300 g |
| EJ-120 |
0.01 g |
±0.01 g |
100 g |
| EJ-200 |
0.01 g |
±0.01 g |
200 g |
| EJ-300 |
0.01 g |
±0.02 g |
300 g |
| EJ-410 |
0.01 g |
±0.02 g |
400 g |
| EJ-610 |
0.01 g |
±0.02 g |
600 g |
| EJ-1202 |
0.03 g |
±0.03 g |
1000 g |
| EJ-3002 |
0.03 g |
±0.03 g |
3000 g |
| EJ-1500 |
0.1 g |
±0.1 g |
1500 g |
| EJ-2000 |
0.1 g |
±0.1 g |
2000 g |
| EJ-3000 |
0.1 g |
±0.2 g |
3000 g |
| EJ-4100 |
0.1 g |
±0.2 g |
4000 g |
| EJ-6100 |
0.1 g |
±0.2 g |
6000 g |
Counting Function Specifications
| Parameter |
0.001 g Models |
0.01 g Models |
0.1 g Models |
| No. of samples |
5, 10, 25, 50 or 100 pieces |
| Min. unit weight |
0.001 g |
0.01 g |
0.1 g |
| Min. % display |
0.01% |
0.1% |
0.1% |
| Min. 100% weight |
0.1 g |
1 g |
10 g |
Environmental Specifications
| Parameter |
Specification |
| Operating temperature |
-10°C-30°C, less than 85% R.H. (non-condensing) |
| Sensitivity drift |
±20 ppm / °C (10°C-30°C / 50°F-86°F) |
Physical Specifications
| Model Range |
Weight |
| EJ-123, EJ-303 |
Approx. 1160 g |
| EJ-120 to EJ-610 |
Approx. 850 g |
| EJ-1202, EJ-3002 |
Approx. 1490 g |
| EJ-1500 to EJ-6100 |
Approx. 1100 g |
Available Options
- EJ-02C: USB interface with cable
- EJ-03: RS-232C interface
- EJ-07: Underhook for EJ-3000 to EJ-6100 (except for EJ-3002)
- EJ-08: Underhook for EJ-1500, EJ-2000
- EJ-11: Breeze break (Draft Shield)
- EJ-12: Carrying case (except for EJ-123/EJ-303, EJ-1202/3002)
- EJ-13: Density determination kit for EJ-120/EJ-200/EJ-300/EJ-410/EJ-610
Compatible Accessories
- TB:662: AC adapter 120V/220V (Replacement)
- TB:164: AC adapter 240V (Round prongs)
- AD-8127: Compact printer
- AX-KO2466-220: Cable
- AX-USB-9P: Serial to USB Adapter
