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E1 Class Weights of OIML R111 1kg

Specifications:

Design

Knob type , Integral/ Single-piece (monobloc) Wire/Bar

Density 

8000 (± 30) kg/m3

Material

High-grade non magnetic Austenitic stainless steel, SS-316

Capacity

1 Kg

OIML Tolerance Class

E1/E2

Packing     

Packed in hard case aluminuim box

Susceptibility X

< 0.02

Calibration certificate

Included standard manufacturing certificate and a calibration

certificate produced in accordance with OIML R 111-1:2004 and ISO

17025:2017 requirements.


E1 Class 1 kg Calibration Weight — Precision for Your Measurement Needs
When it comes to precision measurement, the E1 Class 1 kg Calibration Weight plays a crucial role in ensuring accuracy and reliability. Designed to meet the highest standards of calibration, this weight is ideal for use in high-precision laboratories, metrology institutes, and industries where the slightest measurement error can have significant consequences.
At Masseprazise, we offer OIML R111 E1 1 kg Weights that are crafted from high-grade materials and certified to meet international standards. Our 1 kg calibration weights are trusted by professionals in various industries, including pharmaceuticals, aerospace, research laboratories, and calibration service providers.
Compliance Standards for OIML R111 E1 1 kg Calibration Weight
The OIML R111 E1 1 kg calibration weight is designed to meet the strictest international standards for mass calibration. These compliance standards ensure that the weight provides exceptional accuracy, reliability, and traceability, making it suitable for use in laboratories, metrology institutes, and industries with high-precision requirements.
OIML R 111-1:2004 Standard

Our 1 kg calibration weights conform to the OIML R 111-1:2004 recommendations, which define:

  • The permissible error limits for different tolerance classes (including E1).
  • Specifications for material density and magnetic properties.
  • Surface finish, design, and construction requirements.

According to OIML R111, E1 class weights must have the tightest tolerances, the lowest magnetic susceptibility, and be made of high-quality, corrosion-resistant materials — all of which are met by Masseprazise’s weights.

ISO/IEC 17025:2017 Calibration Certification

Every OIML R111 E1 1 kg weight supplied by Masseprazise comes with a calibration certificate issued by an ISO/IEC 17025:2017 accredited laboratory. This ensures:

  • The calibration process is performed with the highest technical competence.
  • Results are traceable to national or international standards.
  • The documentation meets regulatory and audit requirements globally.
Material and Magnetic Compliance
  • Material: Made from high-grade non-magnetic austenitic stainless steel (SS-316) as required for E1 weights
  • Magnetic susceptibility: < 0.02, ensuring minimal interaction with magnetic fields during calibration.
  • Density: 8000 (± 30) kg/m³, as specified for E1 class weights.
Additional Compliance Features
  • Design: Monobloc (single-piece) knob type, as preferred for E1 class precision
  • Packaging: Secure aluminium hard case that protects against damage and contamination.
By choosing a Masseprazise OIML R111 E1 1 kg calibration weight, you are assured of full compliance with these international standards, ensuring your calibration processes are accurate, auditable, and reliable.
Tolerance Limits of E1 Class 1 kg Calibration Weight

The E1 Class 1 kg calibration weight is manufactured to the highest level of precision, ensuring compliance with the most stringent tolerance requirements defined under OIML R111-1:2004.

  • Capacity: 1 kg
  • OIML Tolerance Class: E1 / E2

For E1 class weights, the tolerance is extremely tight, typically allowing only minimal permissible deviation from the nominal mass. This ensures that the weight is suitable for calibrating high-accuracy balances with readability of 0.1 mg or finer.

  • E1 Tolerance for 1 kg weight: ±0.5 mg
  • E2 Tolerance for 1 kg weight: ±1.6 mg
Such precise tolerance limits make the OIML R111 E1 1 kg weight ideal for use in laboratories, metrology institutes, and quality control environments where absolute accuracy is critical.