WEIGHT SETS CLASS E 1 Ohaus (30390925)

WEIGHT SETS CLASS E 1 Ohaus (30390925)

The WEIGHT SETS CLASS E 1 Ohaus (30390925) is a comprehensive high-precision calibration weight set designed for ultra-accurate mass calibration and verification of analytical and microbalances. Manufactured to OIML Class E1 standards and supplied with an ISO/IEC 17025 accredited calibration certificate, this set delivers full traceability, excellent stability, and reliable performance for critical laboratory and metrology applications.

This E1 class weight set covers a wide mass range from 1 mg to 5 g, making it suitable for highly sensitive balance calibration as well as routine reference checks. Each weight is produced with one-piece construction to ensure long-term dimensional stability and minimal uncertainty. The set uses optimized materials for each weight range, combining aluminum, stainless steel, and Troemner Alloy 8 to achieve consistent density and durability. All components are neatly stored in a protective case to maintain cleanliness and calibration integrity.

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 analytical and microbalance calibration

• One-piece construction for superior stability and long-term reliability

• Optimized material selection based on weight value for consistent density

• Protective storage case included for safe handling and storage

• Manufactured in the USA for assured quality and traceability

Technical Specifications

• Weight set range: 1 mg to 5 g

• Total set capacity: 11.11 g

• Number of pieces: 16

• OIML class: E1

• Calibration certificate: ISO/IEC 17025 accredited

• 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

• Case dimensions (H × Ø): 4.5 × 3.5 in (11.43 × 8.89 cm)

• Country of origin: USA

Applications

• Calibration and verification of analytical and microbalances

• Reference mass standards in metrology and calibration laboratories

• Pharmaceutical, chemical, and academic research requiring extreme accuracy

• Quality control and regulatory compliance testing