WEIGHT SETS CLASS E 2 Ohaus (80780381)

WEIGHT SETS CLASS E 2 Ohaus (80780381)

The WEIGHT SETS CLASS E 2 Ohaus (80780381) high-precision mass calibration for laboratories that require excellent accuracy at micro and milligram levels. Therefore, this weight set supports critical calibration tasks for analytical balances and microbalances used in research, pharmaceutical, and metrology applications. Moreover, the set complies fully with OIML Class E2 requirements, ensuring international traceability and consistent measurement performance.

Ohaus designs this weight set with a total capacity of 1.11 g and includes 12 individual weights that cover a wide calibration range. As a result, laboratories can perform step-by-step balance verification with fine resolution and confidence. Additionally, each weight features a one-piece construction, which improves mass stability and reduces the risk of long-term drift during repeated use.

To ensure optimal material performance, Ohaus selects different materials based on weight value. Specifically, weights from 5 mg to 500 mg use high-grade 316 stainless steel to provide durability and corrosion resistance. Meanwhile, weights below 5 mg use aluminum alloy to maintain appropriate density and handling characteristics. Consequently, each weight delivers stable performance while remaining easy to handle with precision tools. At 20°C, weights below 5 mg have a density of 2.70 g/cm³, while weights from 5 mg to 500 mg maintain a density of 7.95 g/cm³.

Ohaus supplies this E2 weight set with a protective case. In addition, the compact case design protects the weights from contamination, mechanical damage, and environmental exposure during storage and transport. Furthermore, the organized layout inside the case allows technicians to access and return each weight efficiently. For this reason, the set remains well suited for routine laboratory calibration and long-term storage.

Features

• Meets OIML Class E2 requirements for high-precision micro and milligram calibration

• Covers a wide calibration range from 500 mg to 1 mg

• One-piece construction for improved mass stability

• Uses 316 stainless steel and aluminum alloys optimized for each weight value

• Includes protective case for safe storage and handling

• Manufactured in the USA under controlled quality standards

Specifications

• OIML Class: E2

• Weight Set Range: 500 mg – 1 mg

• Total Set Capacity: 1.11 g

• Total Pieces: 12

• Construction: One-piece

• Weight Material:

  • 500 mg to 5 mg: 316 Stainless Steel

  • Below 5 mg: Aluminum (3003-H14)

• Density at 20°C:

  • Below 5 mg: 2.70 g/cm³

  • 5 mg to 500 mg: 7.95 g/cm³

• Dimensions in Case: 4.5 in x 3.5 in (11.43 cm x 8.89 cm) (H x Ø)

• Country of Origin: USA

Set Contents
1 mg; (2) 2 mg; 5 mg; (2) 20 mg; 50 mg; (2) 200 mg; 10 mg; 100 mg; 500 mg

Applications
Laboratories use this E2 calibration weight set to verify and calibrate analytical balances and microbalances with high resolution. 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 reliable measurement performance in critical low-mass applications.