1 mg–5 kg Calibration Weight Set, E1 Class, Polished Stainless Steel Buttons, Wooden Case - KERN

Take advantage of a certified OIML E1 reference standard combined with durable polished stainless steel construction and organised storage for reliable calibration workflows. Order the set directly via Metav Werkzeuge or consult our specialists for application advice.

KERN 303-08 — E1 calibration weight set, 1 mg–5 kg, polished stainless steel

The KERN 303-08 is a precision calibration weight set designed for laboratory and calibration centre use, delivering reference masses from milligrams to kilograms in OIML class E1.

• KERN 303-08: OIML class E1 precision
• Nominal values from 1 mg to 5 kg
• Polished stainless steel weights
• Milligram set in separate plastic case
• Supplied in a wooden presentation case

Certified class E1 accuracy for reference calibrations

This weight set delivers traceable calibration standards across a wide span, covering 1 mg–5 kg with class OIML E1 accuracy. Class E1 denotes the highest level of legal metrology tolerance for laboratory reference masses, making the set suitable as a primary reference for calibration laboratories and quality assurance departments. The tight tolerances reduce measurement uncertainty during instrument adjustment and verification, which supports reproducible results and audit-readiness in scientific and industrial metrology environments.

Durable materials and practical handling for long service life

Manufactured from polished stainless steel, the weights resist corrosion and surface degradation, supporting long-term stability and low maintenance. The knob form of larger weights improves handling and reduces contact with measuring surfaces, decreasing contamination risks that can affect mass values. Smaller milligram weights are supplied in a separate plastic insert to prevent abrasion and to keep the smallest pieces organised, while the complete set is presented in a protective wooden case for safe transport and storage.

Built for professional workflows and traceable documentation

Designed with calibration workflows in mind, the set supports repeatable reference measurements required by laboratories and instrument manufacturers. The combination of material choice, class OIML E1 certification and organised packaging ensures straightforward integration into calibration procedures and metrological control plans. Manufactured in Germany, the set meets expectations for consistent production quality and provides a robust basis for maintaining measurement integrity across routine checks and formal recalibrations.

Contact Metav Werkzeuge today for detailed application guidance or to arrange supply from our Emmerich facility — info@metav-werkzeuge.com | +49 2822 7131930 | WhatsApp +49 170 2837271

Technical data

• Article number: 303
• SKU: 303-08
• Manufacturer: KERN
• GTIN: 4045761002524
• Origin: DE

Facts

• Nominal range: 1 mg–5 kg
• Gross weight: 17.81 kg
• Tariff code: 84239090

Special features

• Material: polished stainless steel
• Form: knob form
• Case material: wood
• Milligram weights stored in a separate plastic case
• OIML class: E1

FAQ

What mass range does this weight set cover?
The KERN 303-08 covers masses from 1 mg to 5 kg, providing a continuous set of reference values for laboratory calibration work.

Which accuracy class does the set conform to?
This weight set is certified to OIML E1, the class intended for high-precision laboratory reference weights.

What material are the weights made from?
All weights in the set are made from polished stainless steel, chosen for stability and corrosion resistance.

How are the milligram weights supplied and protected?
The milligram weights (1 mg–500 mg) are supplied in a separate plastic insert to keep the smallest masses organised and protected from abrasion.

Who manufactures the set and where is it produced?
The set is manufactured by KERN and originates from Germany (DE).

KERN · Germany · GTIN: 4045761002524