1 mg-2 kg Calibration Weight Set Knob Stainless Polished, OIML E1 Wooden Case - KERN

Take advantage of laboratory-grade accuracy together with robust handling and organised storage for reliable calibration workflows; order directly via Metav Werkzeuge or consult our specialists for tailored advice.

KERN 303-07 — OIML Class E1 precision weight set, 1 mg–2 kg, polished stainless steel

The KERN 303-07 is a precision OIML E1 weight set designed for the calibration of laboratory and high-precision industrial scales, supplied as knob-shaped weights in a wooden storage case.

• OIML class E1 accuracy
• 1 mg–2 kg nominal range
• Polished stainless-steel buttons
• Supplied in wooden storage case

Precision assured for calibration tasks

This weight set is specified for OIML Class E1, the highest accuracy class used in calibration laboratories and for legal metrology checks. The set covers the full span from 1 mg to 2 kg, enabling a single, traceable solution for both milligram‑level adjustments and kilogram calibrations. Each mass is manufactured from polished stainless steel, which reduces corrosion and surface contamination; this ensures that mass values remain stable and that handling effects are minimised. Where milligram weights are concerned, the smallest pieces are stored in a separate plastic case to protect against dust and mechanical contact.

Designed for safe handling and repeatable results

Knob‑shaped masses allow secure picking and positioning without tools, improving repeatability during routine calibrations and reducing the risk of contact‑related errors. The wooden case provides organised storage and shock protection, making the set practical for laboratory benches or secure transport between sites. Components are finished to a high standard, so wear is reduced over time and long‑term traceability of calibration results is supported by the stable physical properties of the materials used.

Fit for laboratories and technical workshops

Because the set spans from the smallest milligram weights up to 2 kg, it suits application scenarios ranging from microbalance verification to routine workshop checks of precision scales. The manufacturer's quality and the set's compliance with international standards facilitate conformity assessments and internal quality control procedures. Supplied components and packaging are arranged to minimise handling and to keep the calibration environment clean, supporting efficient workflows and consistent measurement certainty.

For laboratory‑grade calibration support and procurement, contact Metav Werkzeuge—your partner in precision from Emmerich; enquiries: info@metav-werkzeuge.com | Tel +49 2822 7131930 | WhatsApp +49 170 2837271

Technical data

• Article number: 303
• SKU: 303-07
• GTIN: 4045761002517
• Manufacturer: KERN
• Country of origin: DE
• Customs tariff number: 84239090

Facts

• Nominal values: 1 mg–2 kg
• OIML class: E1
• Total set weight (gross): 9.01 kg
• ECLASS: 32120103

Special features

• Material: polished stainless steel
• Form: knob (button) shape
• Case material: wood
• Milligram weights (1 mg–500 mg) stored in separate plastic case
• Suitable for calibration laboratories and precision verification

FAQ

What does OIML Class E1 mean for measurement accuracy?
OIML Class E1 indicates the highest class of accuracy for calibration weights; the KERN 303-07 set meets these stringent tolerances and is intended for laboratory‑grade calibrations.

Are the small milligram weights protected during storage?
Yes, the milligram weights from 1 mg to 500 mg are supplied in a separate plastic case to prevent contamination and mechanical damage.

Can this set be used for both laboratory and workshop checks?
The wide range from 1 mg to 2 kg makes the set suitable for precise laboratory calibrations as well as high‑precision checks in technical workshops.

What material are the masses made from and why is that important?
The masses are made from polished stainless steel, which resists corrosion and surface degradation, helping maintain long‑term stability of mass values.

Is the set supplied ready for immediate use and safe transport?
The complete set is supplied in a wooden storage case with internal organisation to protect the masses and support secure transport.

Manufacturer: KERN, Germany