WEIGHT SETS CLASS E 1 Ohaus (30390909)

WEIGHT SETS CLASS E 1 Ohaus (30390909)

The WEIGHT SETS CLASS E 1 Ohaus (30390909) is a comprehensive, ultra-precision calibration weight set engineered for the most demanding mass calibration and verification tasks. Designed in accordance with OIML Class E1 requirements, this set delivers exceptional accuracy, stability, and traceability for professional metrology, research, and regulated laboratory environments.

Covering an exceptionally wide mass range from 1 mg up to 10 kg with a total capacity of 21.11 kg, this E1 set is suitable for calibrating microbalances, analytical balances, precision balances, and high-capacity mass comparators. Each weight is manufactured using one-piece construction to minimize uncertainty and ensure long-term dimensional stability. Carefully selected materials are applied according to weight value, combining aluminum, stainless steel, and Troemner Alloy 8 to achieve optimal density, corrosion resistance, and reliable calibration performance. All components are securely arranged in a robust protective case for safe handling, storage, and transport.

Key Features

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

• Extremely wide mass range from micro-weights to high-capacity weights

• One-piece construction for superior mechanical stability and reduced uncertainty

• Optimized material selection for consistent density and long service life

• Durable protective case included for secure storage and transport

• Designed for professional metrology and laboratory applications

• Manufactured in the USA for assured quality and traceability

Technical Specifications

• OIML class: E1

• Weight set range: 1 mg to 10 kg

• Total set capacity: 21.11 kg

• Total pieces: 29

• 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

  • 10 kg

• Case dimensions (L × H × W): 8.3 × 16 × 21.2 in (21.082 × 40.64 × 53.848 cm)

• Protective case: Included

• Country of origin: USA

Applications

• Calibration and verification of microbalances and analytical balances

• High-capacity precision balance and mass comparator calibration

• Metrology and accredited calibration laboratories

• Pharmaceutical, chemical, and academic research

• Quality control, validation, and regulatory compliance testing