WEIGHT SETS CLASS E 1 Ohaus (30390912)

WEIGHT SETS CLASS E 1 Ohaus (30390912)

The WEIGHT SETS CLASS E 1 Ohaus (30390912) is a premium, ultra-precision calibration weight set designed for the most demanding mass calibration tasks. Fully compliant with OIML Class E1 requirements and supplied with an ISO/IEC 17025 accredited calibration certificate, this set provides exceptional traceability, accuracy, and long-term stability for professional metrology and laboratory environments.

Covering an extensive mass range from 1 mg up to 5 kg with a total capacity of 11.11 kg, this E1 set is suitable for calibrating microbalances, analytical balances, precision balances, and mass comparators. Each weight is manufactured with one-piece construction to minimize uncertainty and ensure mechanical robustness. Materials are carefully selected according to weight value, combining aluminum, stainless steel, and Troemner Alloy 8 to achieve optimal density, corrosion resistance, and consistent calibration performance. All components are securely stored in a durable protective case for safe handling, storage, and transport.

Key Features

• OIML Class E1 classification for ultra-high accuracy mass calibration

• Supplied with ISO/IEC 17025 accredited calibration certificate

• Extremely wide mass range for microbalance to high-capacity balance calibration

• One-piece construction for superior stability and reduced uncertainty

• Optimized material selection for consistent density and long service life

• Robust protective case included for secure storage and transport

• Manufactured in the USA for assured quality and traceability

Technical Specifications

• OIML class: E1

• Weight set range: 1 mg to 5 kg

• Total set capacity: 11.11 kg

• Total pieces: 28

• Construction: One-piece

• Density at 20 °C:

  • Below 5 mg: 2.70 g/cm³

  • 5 mg to 500 mg: 7.95 g/cm³

  • 1 g and above: 8.03 g/cm³

• Weight material:

  • Below 5 mg: 3003-H14 aluminum

  • 5 mg to 500 mg: 316 stainless steel

  • 1 g and above: Troemner Alloy 8

• Set contents:

  • 1 mg

  • 2 mg (2 pieces)

  • 5 mg

  • 10 mg

  • 20 mg (2 pieces)

  • 50 mg

  • 100 mg

  • 200 mg (2 pieces)

  • 500 mg

  • 1 g

  • 2 g (2 pieces)

  • 5 g

  • 10 g

  • 20 g (2 pieces)

  • 50 g

  • 100 g

  • 200 g (2 pieces)

  • 500 g

  • 1 kg

  • 2 kg (2 pieces)

  • 5 kg

• Case dimensions (L × H × W): 7.3 × 15.2 × 19.2 in (18.542 × 38.608 × 48.768 cm)

• Protective case: Included

• Country of origin: USA

Applications

• Calibration and verification of microbalances, analytical balances, and precision balances

• Reference mass standards for mass comparators

• Metrology and accredited calibration laboratories

• Pharmaceutical, chemical, and academic research

• Quality control, validation, and regulatory compliance testing