The W3002A-120 is a semi-micro analytical balance — the highest-precision balance in the Accuris W3000-series catalog, featuring dual-range capability: 62 g × 0.0001 g (0.1 mg readability at the lower-capacity range) AND 120 g × 0.00001 g (0.01 mg / 10 µg readability — semi-micro range) at the higher-capacity setting. The Tx series designates the touch-screen user interface (vs the Dx series graphical-display variant). Internal auto-calibration eliminates external-calibration-weight workflow; ships with built-in calibration weight on a programmable schedule.
Author confidence note (MEDIUM): Specific W3002A brochure not in the available corpus; spec details inferred from universe label and pattern-matching to the W3100A / W3101A / W3102A internal-calibration analytical balance series. Confirm specific Tx series UI features, dual-range switching mechanism, and full ergonomic spec at first order.
Voltage options: This unit can be ordered with European voltage requirements (230V/50Hz). Contact us to order.
Key Specifications
| SKU | W3002A-120 |
| Type | Semi-micro analytical balance with internal calibration, Touch Screen UI |
| Series | Tx (Touch Screen) |
| Capacity / Readability — Range 1 | 62 g × 0.0001 g (0.1 mg) |
| Capacity / Readability — Range 2 (semi-micro) | 120 g × 0.00001 g (0.01 mg / 10 µg — semi-micro) |
| Calibration mode | Internal auto-calibration with built-in calibration weight + programmable calibration schedule |
| Voltage | 115 V (North American outlet) |
| Sister Tx series SKU (single-range 220g) | W3102A-220 (220 g × 0.0001 g, $3,992.00) — single-range Tx without semi-micro |
| Sister Dx series SKUs | W3101A-120 (120 g × 0.0001 g Dx, $2,258), W3101A-220 (220 g × 0.0001 g Dx, $3,992.00) |
| Older series sister | W3100A-120 (120 g × 0.0001 g basic internal-cal, $2,354) |
| Recommended calibration weights | W1101-6-100 E2 grade set ($751) — workflow-mandatory for semi-micro tolerance |
| List price | $3,992 |
Why a Semi-Micro Balance — 0.01 mg Readability
The W3002A's 120 g × 0.00001 g (0.01 mg) range delivers 10× the readability resolution of standard analytical balances (0.1 mg) — important for workflows where mass-measurement at the microgram scale matters:
| Workflow | Standard analytical (0.1 mg) | Semi-micro (0.01 mg / W3002A-120) |
| Pharmaceutical reference standard prep | Acceptable for mg-scale standards | Required for sub-mg / µg-scale standards |
| Trace-impurity analysis | Limited resolution | Better resolution for low-level impurity quantification |
| Compound-library micro-aliquoting | Limited at sub-mg masses | Required for accurate µg-aliquoting |
| Rare-sample mass measurement | Resolution-limited at low mass | Microgram-resolution matters for high-stakes samples |
Pick the W3002A-120 semi-micro when: workflow requires 0.01 mg readability or sub-milligram mass-measurement accuracy. Step down to standard analytical (0.1 mg readability) sister balances (W3101A / W3102A / W3100A series) for routine analytical workflows where 0.1 mg is sufficient.
Dual-Range Operation
The W3002A's dual-range design lets the operator switch between:
- Range 1: 62 g × 0.0001 g — standard analytical resolution at the lower capacity (faster stabilization, less environmental sensitivity)
- Range 2: 120 g × 0.00001 g — semi-micro resolution at the full capacity (longer stabilization, higher environmental sensitivity)
Workflow advantage: One balance covers both standard analytical and semi-micro workflows — no need to procure separate balances for each readability class.
Accuris Analytical Balance Family — Series and Capacity Comparison
| SKU | Series | Capacity / Readability | Internal cal | UI | List price |
| W3100-120 / -120-E | (basic) | 120 g × 0.0001 g | No (external) | LCD | $2,219 |
| W3100-210 / -210-E | (basic) | 210 g × 0.0001 g | No (external) | LCD | (sister pricing) |
| W3100A-120 / -120-E | (basic+) | 120 g × 0.0001 g | Yes | LCD | $2,354 |
| W3100A-210 / -210-E | (basic+) | 210 g × 0.0001 g | Yes | LCD | (sister pricing) |
| W3101A-120 | Dx | 120 g × 0.0001 g | Yes | Graphical Display | $2,258 |
| W3101A-220 | Dx | 220 g × 0.0001 g | Yes | Graphical Display | $3,992.00 |
| W3102A-220 | Tx | 220 g × 0.0001 g | Yes | Touch Screen | $3,992.00 |
| W3002A-120 (this product) | Tx | 62 g × 0.0001 g + 120 g × 0.00001 g (semi-micro) | Yes | Touch Screen | $3,992 |
Series differentiation:
- (basic / basic+ series) — entry-tier analytical balances with LCD display
- Dx series (Graphical Display) — mid-tier with graphical-data display vs basic LCD
- Tx series (Touch Screen) — top-tier with touch-screen UI; W3002A is the semi-micro variant
Application Profile
Pharmaceutical reference standard preparation — the workhorse semi-micro application. Sub-milligram reference-standard mass measurement.
Trace-impurity analysis — quantification of trace contaminants in drug-substance / drug-product samples.
Compound-library micro-aliquoting — pharma / biotech screening libraries with microgram-scale aliquoting workflow.
Rare-sample mass measurement — natural products research, ancient-DNA forensic samples, or other high-stakes-sample workflows requiring microgram resolution.
Regulated-laboratory analytical workflows — FDA / GLP / ISO 17025 environments with semi-micro analytical balance requirements.
Method-development analytical workflows — method-development requiring sub-milligram method-validation precision.
Multi-investigator analytical core facilities — shared semi-micro analytical balance facilities benefit from the touch-screen Tx UI for multi-operator workflow consistency.
Frequently Asked Questions
What readability does the W3002A-120 provide? It is dual-range: 62 g × 0.0001 g (0.1 mg) at the lower-capacity setting and 120 g × 0.00001 g (0.01 mg / 10 µg, semi-micro) at the higher-capacity setting — 10× the resolution of a standard 0.1 mg analytical balance.
What does the Tx series designation mean? Tx designates the touch-screen user interface, as opposed to the Dx series graphical display and the basic-series LCD.
Does the W3002A-120 need external calibration weights? It has internal auto-calibration with a built-in weight and programmable schedule. For verification at semi-micro tolerance it requires E2-grade weights (W1101-6-100 set, $751); F1 grade is insufficient.
When should I step down to a standard analytical balance? For routine analytical workflows where 0.1 mg readability is sufficient, step down to the Dx or Tx single-range balances (W3101A / W3102A) or the basic W3100A series.
Ordering & Configuration
Pair with E2-grade calibration weight set. The W3002A-120 semi-micro readability requires E2-grade calibration weights (W1101-6-100 set, $751) — F1 grade tolerance is insufficient for semi-micro verification.
Environmental considerations. Semi-micro balances are environmentally sensitive — install on stable bench in vibration-controlled, temperature-controlled, draft-free environment per Accuris installation guide. Confirm installation environment at order.
Plug type at order. Universe shows 115V US-plug variant; international -E variant may be available — confirm at order.
Confirm at quote: workflow readability requirement (0.1 mg vs 0.01 mg semi-micro), installation environment (vibration / temperature / draft control), E2 calibration weight pairing (W1101-6-100), training requirements, and lead time.
Warranty: Per Accuris standard warranty terms — confirm at quote.
Accuris analytical balance family — pick the right tier:
See the family table above for complete series and capacity comparison across W3100 / W3100A (basic), W3101A (Dx), W3102A (Tx), and W3002A-120 (this product, Tx semi-micro).
Pick the W3002A-120 for semi-micro workflows requiring 0.01 mg readability; step down to W3101A / W3102A for standard 0.1 mg analytical workflows.
