A&D EJ-123 Newton Precision Balance, 120 g x 0.001 g, Battery or AC, Breeze Break

Description

A&D EJ-123 Newton Precision Balance: 120 g × 0.001 g

The A&D Weighing EJ-123 is the milligram model in A&D’s Newton EJ series of portable balances. It weighs up to 120 g in 0.001 g steps (1/120,000 resolution) and comes with a clear breeze break that keeps air currents from disturbing milligram readings.

Run it on the included AC adapter, or go cordless on four AA batteries (not included) for about 80 hours. The 16 mm backlit LCD is easy to read in dim rooms, and counting, percent, hold, and accumulation functions are built in. Add the optional EJ-02 USB or EJ-03 RS-232C interface to send results to a PC or printer.

Key Features

• 120 g × 0.001 g with 0.003 g repeatability and ±0.003 g linearity
• Breeze break included for stable milligram readings
• 16 mm backlit LCD, 10 updates per second
• Counting (up to 120,000 pcs), percent, hold, and accumulation functions
• AC or battery power: about 80 hours on 4 alkaline AA batteries (not included)
• Units: g, oz, ozt, ct, dwt, grains, pcs, %
• One option slot: EJ-02 USB or EJ-03 RS-232C (not included)
• Security slot for lockdown
• 5-year A&D warranty

Applications

Schools and Laboratories

An affordable milligram balance for student labs, sample prep, and general testing, light enough to move between rooms.

Reloading

Weigh powder charges in grains with 0.02 gr resolution, on batteries at the range or on AC at the bench.

Jewelry and Gemstones

Weigh in carats (0.005 ct), pennyweight, troy ounces, or grams. The EJ-123 is not legal for trade.

A&D EJ-123 Specifications

Brand / Series	A&D Weighing / Newton EJ
Model (MPN)	EJ-123
Capacity	120 g
Readability	0.001 g
Repeatability (std. dev.)	0.003 g
Linearity	±0.003 g
Sensitivity drift	±20 ppm/°C (10 to 30 °C / 50 to 86 °F)
Weighing units	g, oz (0.0001), ozt (0.0001), ct (0.005), dwt (0.001), GN (0.02), pcs, %
Counting	5, 10, 25, 50 or 100 samples; max. 120,000 pcs; min. unit weight 0.001 g
Weighing pan	Ø110 mm stainless steel, with breeze break
Display	7-segment backlit LCD, 16 mm characters, 10 updates per second
Power	AC adapter (included) or 4 × AA batteries (not included); approx. 80 hours on alkalines, backlight off
Interfaces	Optional EJ-02 USB or EJ-03 RS-232C (one slot; not included)
Calibration	External; factory calibration weight setting 100 g (weight not included)
Operating environment	10 to 30 °C (50 to 86 °F), less than 85% RH
Dimensions (W × D × H)	190 × 211 × 133 mm
Net weight	Approx. 1.16 kg
Warranty	5-year A&D warranty

What’s in the Box

• A&D EJ-123 balance with breeze break
• Ø110 mm stainless steel weighing pan
• AC adapter
• Instruction manual

AA batteries, the 100 g calibration weight, and the USB or RS-232C interface are not included.

Compatible Accessories

• A&D 100 g calibration weight (sold separately, not included): matches the EJ-123 factory calibration setting
• A&D EJ-02 USB interface with cable (sold separately)
• A&D EJ-03 RS-232C interface (sold separately)
• A&D TB-662 original AC adapter: spare or replacement

Related A&D Balances

• A&D EJ-303, 310 g × 0.001 g
• A&D EJ-120, 120 g × 0.01 g
• A&D EJ-200, 200 g × 0.01 g
• A&D FX-300i, 320 g × 0.001 g with 1-second readings

Calibration Options from MNM Scales

Get your EJ-123 calibrated and ready to use on day one. Add either option to your order, and our TDA-registered technicians calibrate it in-house before it ships:

• In-house calibration with certificate, using NIST-tested weights: $95. We calibrate and verify your EJ-123 with NIST-tested weights and include a calibration certificate, so it arrives set up and accurate. Add $95 calibration to cart
• NIST calibration with a NIST-traceable certificate: $395. Full calibration documented on a NIST-traceable certificate, for labs, schools, and audits that need a paper trail. Add $395 NIST calibration to cart

We also recalibrate scales and balances you already own, by mail-in or in our shop, with on-site service across Houston and the surrounding area. Request calibration or call (832) 290-3120.

Manuals and Documents

• A&D EJ-123 instruction manual (PDF)

Frequently Asked Questions

Does the A&D EJ-123 come with batteries?

No. It runs on the included AC adapter, or on 4 AA batteries (not included) for about 80 hours with alkalines.

What calibration weight does the EJ-123 use?

The factory setting is 100 g. A weight is not included; add our 100 g calibration weight, or have us calibrate it before it ships.

Can I connect the EJ-123 to a computer?

Yes, with the optional EJ-02 USB or EJ-03 RS-232C interface (one slot, not included).

Is the EJ-123 legal for trade?

No. It is built for lab, school, reloading, and general testing use.

Why Buy Your A&D Balance from MNM Scales?

MNM Scales is an authorized A&D Weighing dealer and one of the largest scale distributors in the country, with one of the largest selections of balances and scales in every category. We offer free shipping in the continental U.S., in-house calibration and certificates, and real help choosing the right model from our Houston-area team. Wholesale and volume buyers can contact us for a quote.