20 g Precision Calibration Weight Button Shape Polished Stainless Steel OIML E1, 0.025 mg Tolerance - KERN
€100.00
Product information "20 g Precision Calibration Weight Button Shape Polished Stainless Steel OIML E1, 0.025 mg Tolerance - KERN"
Take advantage of the combination of OIML E1 accuracy, polished stainless-steel durability and compact handling to ensure reliable scale verification in high-precision environments. Order this calibration weight directly via Metav Werkzeuge or ask our consultants for advice on the correct protective case.
KERN 307-05 — 20 g OIML E1 calibration weight, polished stainless steel
A KERN 307-05 reference mass in button form for traceable verification of high-precision balances and laboratory scales
- OIML Class E1 certified accuracy
- Polished stainless steel for long-term stability
- Compact button form for safe placement on balances
Engineered accuracy for traceable results
The core benefit of this reference mass is its OIML E1 classification, which guarantees a very low maximum permissible error of 0.025 mg. Such precision is essential when verifying analytical balances and high-resolution scales, as it maintains measurement confidence and reduces uncertainty in documented calibration procedures. The nominal mass of 20 g makes the item suitable as a mid-range calibration point for many laboratory and quality-control routines, supporting compliance with internal protocols and external audit requirements.
Durable design that supports repeated use
Constructed from polished stainless steel, the weight resists corrosion and surface degradation, which preserves its metrological properties over time. The button form and compact dimensions (13×22 mm) enable safe, repeatable placement on pans and reduce the risk of accidental contact. The smooth finish facilitates gentle cleaning without abrasive treatment, so the reference mass stays within tolerance while remaining easy to handle during daily verification tasks.
Practical integration into calibration workflows
This verification weight is manufactured by KERN and is designed for use in calibration laboratories, production quality departments and service centres that require reproducible reference points. For optimal longevity and to avoid contamination, a protective case is recommended for transport and storage; Metav Werkzeuge can advise on suitable etui options. Selecting a certified reference mass like this one contributes to demonstrable traceability chains and helps streamline internal quality assurance procedures.
For traceable calibrations and tailored accessory advice, contact Metav Werkzeuge to order the KERN 307-05 or to discuss the right protective case and delivery options – eMail: info@metav-werkzeuge.com / Tel: +49 2822 7131930
Technical data
- SKU: 307-05
- Article number: 307
- Manufacturer: KERN
- Origin: DE
- GTIN: 4045761002708
Facts
- Nominal mass: 20 g
- Mass in kg: 0.02 kg
- Tolerance (OIML E1): 0.025 mg
- Dimensions (cylinder): 13×22 mm
- Tariff code: 84239090
- eClass: 32120103
Special features
- Material: polished stainless steel
- Form: button form
- OIML class: E1
- Recommended accessory: protective case (etui)
FAQ
What does OIML E1 mean for laboratory use?
OIML E1 denotes the highest common accuracy class for calibration masses; the KERN 307-05 meets these strict tolerances, making it appropriate for the most demanding laboratory verifications.
Can this weight be used on analytical and semi-micro balances?
Yes, the 20 g reference mass is suitable as a verification point for many analytical and semi-micro balances where a 20 g nominal mass is required and an E1 class standard is specified.
How should the mass be stored to maintain accuracy?
Store the reference mass in a clean, dry protective case and avoid direct handling of the measuring surface; Metav Werkzeuge recommends an etui for transport and storage to preserve the KERN 307-05’s tolerance.
Is the surface finish important for calibration weights?
Yes. The polished stainless-steel finish reduces corrosion and surface deposits, preserving the mass value and making gentle cleaning straightforward for repeated calibration cycles.
Are there recommendations for cleaning and handling?
Handle with tweezers or gloves to avoid fingerprints; clean with a soft, lint-free cloth and avoid abrasive cleaners to maintain the calibrated surface and the long-term stability of the verification mass.
KERN — origin: DE