Accuris Class E2 Calibration Weight Set, 6 Pieces, 100 mg to 100 g

The W1101-6-100 is the Class E2 OIML calibration weight set, the highest-precision OIML calibration grade in the Accuris catalog (above F1 grade). The 6-piece set covers 100 mg to 100 g range for calibration of semi-micro analytical balances (where 0.1 mg / 0.01 mg readability requires tighter-than-F1 tolerance) and regulated-laboratory analytical balance calibration at the highest accuracy class.

Key Specifications

OIML Calibration Grade Hierarchy: E2 vs F1 vs M1

The OIML weight-class hierarchy (most precise → least precise):

Pick E2 grade (W1101-6-100) when:

• Balance is semi-micro analytical (0.01 mg readability; e.g., the W3002A-120 Tx Touch Screen semi-micro)
• Workflow is in a highly-regulated environment (FDA, GLP, ISO 17025) requiring documented E2-grade calibration traceability
• Calibration accuracy at the F1 tolerance (±0.5 mg at 100 g) is insufficient for the workflow's analytical requirements

Pick F1 grade (W1100-200) when: standard analytical balance calibration (0.1 mg readability) is sufficient, most common analytical balance calibration scope.

Pick M1 grade (W1005-x family) for standard / industrial balance calibration.

Why a 6-Piece Set vs Larger F1 Set

The W1101 E2 set is smaller than the W1100-200 F1 set (23 pieces) because E2 grade weights carry higher per-weight cost (the 6-piece composition provides multi-point calibration coverage at strategically-selected mass values (typical: 100 mg, 1 g, 10 g, 100 g) multi-decade coverage with duplicate values for verification) rather than every-mass-value coverage:

For complete sub-milligram coverage, the F1 set (W1100-200, 23 pieces, 1 mg-200 g) is the better choice; for E2-precision at strategic mass points, the W1101-6-100 is the right pick.

Pairing with Accuris Semi-Micro / Analytical Balances

Application Profile

Semi-micro analytical balance calibration. The workhorse application. Calibration of the W3002A-120 semi-micro Tx balance and other semi-micro instruments at 0.01 mg readability where F1 tolerance is insufficient.

Regulated-laboratory calibration programs. FDA, GLP, ISO 17025 regulated environments requiring documented E2-grade traceability.

Pharmaceutical / biotech analytical labs. High-stakes weighing workflows where calibration accuracy directly impacts release-criteria decisions.

Method-development analytical workflows. Protocol-development workflows requiring tightest-tolerance calibration during method-validation packages.

Multi-balance facility procurement. Facilities running multiple semi-micro / regulated analytical balances benefit from centralized E2 set procurement.

Ordering & Configuration

Pair with W1000-TF tweezers. E2 weights are the most skin-contamination-sensitive weights in the catalog. Tweezer handling is critical.

Confirm case / storage. E2 sets ship in protective case with weight-position cutouts and typically include integrated calibration certificate. Confirm case + certificate inclusion at order.

Re-certification cycle. E2 weights require periodic re-certification per OIML standard (typical 1–3 year interval; some regulated environments require annual re-certification). Plan for re-certification cycle.

Confirm at quote: balance grade in lab inventory (semi-micro or regulated analytical), full mass-range coverage need (E2 set vs broader F1 set), case / certificate inclusion, re-certification program plan, and lead time.

Warranty: Per Accuris standard accessory terms. Confirm at quote.

Accuris analytical balance calibration weight options: full grade hierarchy:

- W1101-6-100 (this product): Class E2 set, 6 pieces, 100 mg – 100 g ($751), highest precision

- W1100-200 (Class F1 set, 23 pieces, 1 mg – 200 g ($618)) high precision, broader range

- W1000-100 / -200 / -500 / -1000: Individual F1 grade weights (100 g – 1000 g)

- W1005-1 through W1005-2000, Individual M1 grade weights (1 g – 2000 g, lower precision, lower cost)

- W1000-TF, Tweezers ($42), workflow-mandatory for all calibration weight handling

Pick the W1101-6-100 E2 set for semi-micro / regulated analytical balance calibration; sister F1 set covers broader-mass-range standard analytical workflows.