WEIGHT SETS CLASS E 1 Ohaus (30390905)

WEIGHT SETS CLASS E 1 Ohaus (30390905)

The WEIGHT SETS CLASS E 1 Ohaus (30390905) is an ultra-high-capacity, ultra-precision calibration weight set engineered for the most demanding mass calibration and verification applications. Fully compliant with OIML Class E1 requirements and supplied with an ISO/IEC 17025 accredited calibration certificate, this set delivers exceptional accuracy, traceability, and long-term stability for national metrology institutes, accredited calibration laboratories, and advanced industrial quality systems.

This comprehensive E1 weight set covers an extremely wide mass range from 1 mg up to 50 kg, with a total capacity of 100 kg, making it suitable for calibration of microbalances, analytical balances, precision balances, high-capacity balances, and mass comparators. Each weight is manufactured using 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 reliable calibration performance. All components are securely stored in a heavy-duty 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 from micro-weights to very high-capacity weights

• One-piece construction for maximum stability and minimal measurement uncertainty

• Optimized material selection for consistent density and long service life

• Heavy-duty protective case included for secure storage and transport

• Designed for professional metrology and regulated laboratory environments

• Manufactured in the USA for assured quality and traceability

Technical Specifications

• OIML class: E1

• Calibration certificate: ISO/IEC 17025 accredited

• Weight set range: 1 mg to 50 kg

• Total set capacity: 100 kg

• Total pieces: 32

• 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 to 20 kg: 8.03 g/cm³

  • 50 kg: 7.95 g/cm³

• Weight material:

  • Below 5 mg: 3003-H14 aluminum

  • 5 mg to 500 mg: 316 stainless steel

  • 1 g to 20 kg: Troemner Alloy 8

  • 50 kg: 316 stainless steel

• 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

  • 20 kg (2 pieces)

  • 50 kg

• Case dimensions (L × H × W): 11.7 × 19.7 × 24.6 in (29.718 × 50.038 × 62.484 cm)

• Protective case: Included

• Country of origin: USA

Applications

• Calibration and verification of microbalances, analytical, precision, and high-capacity balances

• Mass comparator calibration and reference standards

• National and accredited metrology laboratories

• Pharmaceutical, chemical, and industrial quality control

• Regulatory compliance, validation, and audit support