WEIGHT SETS CLASS E 1 Ohaus (30390038)

WEIGHT SETS CLASS E 1 Ohaus (30390038)

The WEIGHT SETS CLASS E 1 Ohaus (30390038) is a comprehensive ultra-precision calibration weight set designed for the highest level of mass accuracy and traceability. Manufactured in compliance with OIML Class E1 standards and supplied with an ISO/IEC 17025 accredited calibration certificate, this set is intended for critical calibration and verification of analytical balances, microbalances, and mass comparators in professional metrology environments.

This E1 weight set covers an exceptionally wide mass range from 1 mg up to 2 kg, including duplicate 2 kg weights, with a total set capacity of 6.11 kg. Each weight is produced using one-piece construction to ensure excellent mechanical stability, minimal uncertainty, and long-term dimensional accuracy. Optimized material selection is applied according to weight value, combining aluminum, stainless steel, and Troemner Alloy 8 to deliver consistent density, durability, and reliable calibration performance. All components are securely organized in a robust 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 suitable for microbalance to high-capacity 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: 6.11 kg

• Total pieces: 27

• 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: 304 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)

• 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 analytical balances, microbalances, and mass comparators

• Reference mass standards in metrology and accredited calibration laboratories

• Pharmaceutical, chemical, and academic research requiring extreme accuracy

• Quality control, validation, and regulatory compliance testing