A&D EJ-300 (EJ300) Newton Precision Balance, 310 g x 0.01 g, Battery or AC

Description

A&D EJ-300 Newton Precision Balance: 310 g × 0.01 g

The A&D Weighing EJ-300 (EJ300) is the 300 g model in A&D’s Newton EJ series of compact balances. It weighs up to 310 g in 0.01 g steps on a Ø110 mm stainless steel pan, with an anti-static breeze break to keep drafts off the reading. It runs on four AA batteries or the included AC adapter.

Five large keys, a backlit LCD, and simple menus make it easy to use in a classroom, a kitchen, or the field.

Key Features

• 310 g × 0.01 g; repeatability 0.01 g; linearity ±0.02 g
• Ø110 mm (4.3 in) stainless steel pan with anti-static breeze break
• Battery or AC: 4 AA batteries and AC adapter included
• Backlit LCD with 16 mm characters
• Counting with automatic accuracy improvement, percent, display hold, and accumulation (M+)
• Gravity acceleration correction and external calibration
• Optional EJ-03 RS-232C or EJ-02 USB interface (not included)
• Security slot and 5-year A&D warranty

Applications

Education and Laboratories

A durable 0.01 g balance for classrooms and teaching labs, with battery power for benches without outlets.

Kitchens, Hobby, and Reloading

Weigh spices, formulations, and powder charges, and count small pieces quickly.

Jewelry and Gems

Weigh gemstones, findings, and jewelry in carats, pennyweight, and troy ounces. The balance is made for general weighing; for buying or selling precious metals by weight, choose an NTEP Class II balance such as the A&D FX-300iN.

A&D EJ-300 Specifications

What’s in the Box

• A&D EJ-300 balance
• Ø110 mm stainless steel weighing pan
• Breeze break
• AC adapter
• 4 AA batteries
• Instruction manual

A calibration weight and the EJ-02/EJ-03 interfaces are not included.

Compatible Accessories

• A&D EJ-02 USB interface with cable (sold separately)
• A&D EJ-03 RS-232C interface (sold separately)

Related A&D Balances

• A&D EJ-200, 210 g × 0.01 g
• A&D EJ-410, 410 g × 0.01 g
• A&D EJ-610, 610 g × 0.01 g
• A&D EJ-303, 310 g × 0.001 g

Calibration Options from MNM Scales

Get your EJ-300 calibrated and ready to use on day one. Add either option to your order, and our TDA-certified technicians calibrate it in-house before it ships:

• In-house calibration with certificate, using NIST-tested weights: $95. We calibrate and verify your EJ-300 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 schools, labs, and shops 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 Newton EJ series datasheet (PDF)
• A&D Newton EJ brochure (PDF)
• A&D EJ instruction manual (PDF)

Frequently Asked Questions

Does the EJ-300 run on batteries?

Yes. It runs on 4 AA batteries (included) or the included AC adapter.

Is the EJ-300 good for jewelry?

Yes, for weighing gems, findings, and small pieces in carats, pennyweight, and troy ounces. For buying or selling precious metals by weight, choose an NTEP Class II balance such as the A&D FX-300iN.

EJ-300 vs. EJ-303?

Same 310 g capacity. The EJ-300 reads 0.01 g; the EJ-303 reads 0.001 g.

Can MNM Scales calibrate the EJ-300 before it ships?

Yes. Choose in-house calibration with a certificate, using NIST-tested weights, for $95, or NIST calibration with a NIST-traceable certificate for $395.

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.