WEIGHT SETS CLASS E 1 Ohaus (30390914)

WEIGHT SETS CLASS E 1 Ohaus (30390914)

The WEIGHT SETS CLASS E 1 Ohaus (30390914) is an ultra-precision calibration weight set engineered to meet the highest standards of mass accuracy and traceability. Fully compliant with OIML Class E1 requirements and supplied with an ISO/IEC 17025 accredited calibration certificate, this set is designed for critical calibration and verification of analytical balances, microbalances, and mass comparators in professional laboratory and metrology environments.

This comprehensive E1 weight set covers a wide mass range from 1 mg up to 2 kg, with a total set capacity of 4 kg. Each weight is manufactured using one-piece construction to ensure excellent mechanical stability, minimal uncertainty, and long-term dimensional consistency. Carefully selected materials are used according to weight value, combining aluminum, stainless steel, and Troemner Alloy 8 to achieve optimal density, durability, and reliable calibration performance. All weights are neatly organized in a robust protective case to ensure 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

• Wide mass range suitable for microbalance and analytical balance calibration

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

• Optimized material selection for consistent density and long service life

• Complete set supplied in a durable protective storage case

• Manufactured in the USA for assured quality and traceability

Technical Specifications

• OIML class: E1

• Weight set range: 1 mg to 2 kg

• Total set capacity: 4 kg

• Total pieces: 26

• 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

• Case dimensions (L × H × W): 6.6 × 12.7 × 16.2 in (16.764 × 32.258 × 41.148 cm)

• Protective case: Included

• Country of origin: USA

Applications

• Calibration and verification of analytical balances and microbalances

• Reference mass standards for mass comparators

• Metrology and accredited calibration laboratories

• Pharmaceutical, chemical, and academic research

• Quality control, validation, and regulatory compliance testing