Original price was: $2,420.00.$1,344.00Current price is: $1,344.00.
A&D GX-303A Apollo precision balance: 320 g × 0.001 g with internal calibration, for labs, QC, formulation, and sample prep.
- 320 g capacity, 0.001 g readability, ±0.002 g linearity
- Smart-SHS sensor with readings in about 1 second
- Internal calibration plus Automatic Self-Calibration
- Impact Shock Detection, Flow Rate Display, QuickMin-S
- RS-232C and USB standard; 5-year A&D warranty
Add calibration with certificate:
Add In-House Calibration + Certificate ($95) Add NIST Calibration + Certificate ($395)
Description
A&D GX-303A Apollo Precision Balance: 320 g × 0.001 g
The A&D Weighing GX-303A is a milligram balance in A&D’s Apollo GX-A series. It weighs up to 320 g in 0.001 g steps on a 128 × 128 mm pan, and calibrates itself with a built-in weight.
A&D’s Smart-SHS sensor gives readings in about 1 second, and built-in self-checks help you keep records for SOPs and audits.
Key Features
- 320 g × 0.001 g; repeatability 0.001 g, linearity ±0.002 g
- Internal calibration with one-touch CAL and Automatic Self-Calibration (time and temperature)
- Smart-SHS sensor, about 1-second stabilization
- ECL self-check runs a repeatability test without an external weight in about 90 seconds
- QuickMin-S and Min-S Alert for minimum sample weight
- Impact Shock Detection with shock log
- Flow Rate Display for filling and dosing
- Password protection for up to 11 users and 1 administrator
- RS-232C and USB standard; GLP/GMP/GCP output
- Front bubble level with LED and thumbwheel leveling feet
Applications
Laboratory and QC
Weigh samples, reagents, and standards to the milligram, with calibration reports for your records.
Formulation and Sample Prep
Use flow rate display and comparator modes for filling and dosing.
Jewelry and Gems
Weigh gemstones and findings in carats, pennyweight, and troy ounces. For buying or selling precious metals by weight, choose a Class II balance such as the NTEP-approved A&D GX-303AN.
A&D GX-303A Specifications
| Brand / Series | A&D Weighing / Apollo GX-A |
|---|---|
| Model (MPN) | GX-303A |
| Capacity | 320 g |
| Readability | 0.001 g |
| Repeatability (std. dev.) | 0.001 g |
| Linearity | ±0.002 g |
| Stabilization time | Approx. 1 second (0.8 s for 5 g) |
| Sensitivity drift | ±2 ppm/°C (10 to 30 °C, automatic self-calibration off) |
| Calibration | Internal (automatic) and external |
| Weighing pan | 128 × 128 mm (5 × 5 in) |
| Weighing units | g, oz, lb, lb-oz, ozt, ct, dwt, grain |
| Modes | Percent, animal weighing, comparator HI/OK/LO, counting with ACAI, density, statistics, underhook |
| Interface | RS-232C and USB |
| Display | Reverse backlit LCD |
| Dimensions (W × D × H) | 212 × 317 × 93 mm (8.3 × 12.5 × 3.7 in) |
| Weight | Approx. 5 kg (11 lb) |
| Warranty | 5-year A&D warranty |
What’s in the Box
- A&D GX-303A balance with stainless pan and breeze break
- AC adapter
- Instruction manual
Calibration weights, printer, and density kit are not included.
Calibration Options from MNM Scales
Get your GX-303A 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 GX-303A 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, QC programs, 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
The A&D Apollo GX-A / GF-A precision balance data sheet, brochure, and instruction manual are available from A&D Weighing, or call us and we will send them.
Frequently Asked Questions
Does the GX-303A calibrate itself?
Yes. It has a built-in calibration weight, one-touch CAL, and Automatic Self-Calibration triggered by time or temperature change.
Is there a legal-for-trade version?
Yes. The A&D GX-303AN is the NTEP-approved version; call us for pricing.
Can MNM Scales calibrate the GX-303A 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.
Additional information
| Weight | 10 kg |
|---|---|
| Brand | A&D Weighing |








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