WEIGHT SETS CLASS E 2 Ohaus (80780385)

WEIGHT SETS CLASS E 2 Ohaus (80780385)

The WEIGHT SETS CLASS E 2 Ohaus (80780385) high-precision mass calibration for laboratories that require accuracy across both gram and milligram levels. Therefore, this set supports critical calibration and verification tasks for analytical balances and microbalances used in regulated, research, and quality-control environments. Moreover, the set complies fully with OIML Class E2 requirements, ensuring international traceability and consistent weighing performance.

Ohaus designs this weight set with a total capacity of 211.11 g and supplies 21 precisely manufactured individual weights. As a result, laboratories can perform wide-range, stepwise calibration with excellent resolution and flexibility. Additionally, each weight features a one-piece construction, which improves mass stability and minimizes long-term drift during repeated handling.

To optimize performance at each weight level, Ohaus carefully selects materials based on nominal mass. Specifically, weights of 1 g and above use Troemner Alloy 8 to deliver superior dimensional stability and durability. Meanwhile, weights from 5 mg to 500 mg use high-grade 316 stainless steel to ensure corrosion resistance and consistent density. Furthermore, weights below 5 mg use 3003-H14 aluminum to achieve appropriate density and easier handling at micro-mass levels. Consequently, the set maintains reliable performance across the entire calibration range. At 20°C, densities align with each material class: 8.03 g/cm³ for ≥1 g, 7.95 g/cm³ for 5 mg–500 mg, and 2.70 g/cm³ for <5 mg.

Ohaus includes a protective case to preserve accuracy during storage and transport. In addition, the sturdy case protects the weights from contamination and mechanical damage. Moreover, the organized internal layout allows technicians to access, return, and store each weight efficiently. For this reason, the set remains suitable for routine laboratory calibration as well as long-term storage.

Features

• Meets OIML Class E2 requirements for high-precision, wide-range calibration

• Covers an extensive range from 100 g to 1 mg in one set

• One-piece construction for improved mass stability

• Optimized materials by weight value for durability and consistency

• Protective case included for safe handling and storage

• Manufactured in the USA under controlled quality standards

Specifications

• OIML Class: E2

• Weight Set Range: 100 g – 1 mg

• Total Set Capacity: 211.11 g

• Total Pieces: 21

• Construction: One-piece

• Weight Material:

  • ≥1 g: Troemner Alloy 8

  • 5 mg to 500 mg: 316 Stainless Steel

  • Below 5 mg: Aluminum (3003-H14)

• Density at 20°C:

  • ≥1 g: 8.03 g/cm³

  • 5 mg to 500 mg: 7.95 g/cm³

  • Below 5 mg: 2.70 g/cm³

• Dimensions in Case: 3.5 in x 7 in x 8 in (8.89 cm x 17.78 cm x 20.32 cm) (L x H x W)

• Country of Origin: USA

Applications
Laboratories use this E2 calibration weight set to verify and calibrate analytical balances and microbalances across a wide weighing range. Moreover, pharmaceutical laboratories, calibration service providers, quality-control facilities, and research institutions rely on this set to maintain traceable and repeatable weighing accuracy. As a result, organizations can ensure consistent measurement performance across critical low-to-high mass applications.