WEIGHT SETS CLASS E 1 Ohaus (30390920)

WEIGHT SETS CLASS E 1 Ohaus (30390920)

The WEIGHT SETS CLASS E 1 Ohaus (30390920) is a high-precision calibration weight set designed for ultra-accurate mass calibration and verification of analytical balances, microbalances, and high-resolution laboratory weighing systems. Manufactured in accordance with OIML Class E1 standards and supplied with an ISO/IEC 17025 accredited calibration certificate, this set provides full traceability, excellent stability, and confidence for critical metrology applications.

This E1 weight set covers a wide mass range from 1 mg up to 200 g with a total capacity of 400 g, making it suitable for both micro-mass calibration and higher-capacity analytical balance verification. Each weight is produced with one-piece construction to ensure superior mechanical stability and long-term dimensional accuracy. Optimized material selection is applied according to weight value, combining aluminum, stainless steel, and Troemner Alloy 8 to achieve consistent density, durability, and reliable performance. All components are securely arranged in a 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

• Broad mass range suitable for microbalance and analytical balance calibration

• One-piece construction for enhanced stability and reduced 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 200 g

• Total set capacity: 400 g

• Total pieces: 22

• 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

• Case dimensions (L × H × W): 3.5 × 7 × 8 in (8.89 × 17.78 × 20.32 cm)

• Protective case: Included

• Country of origin: USA

Applications

• Calibration and verification of analytical and microbalances

• Reference mass standards in metrology and accredited calibration laboratories

• Pharmaceutical, chemical, and academic research requiring extreme accuracy

• Quality control, validation, and regulatory compliance testing