Maintain the absolute accuracy of your laboratory weighing equipment with professional calibration weights. This specialized range features high-precision OIML-certified weights from Kern & Sohn, engineered to provide the traceable standards necessary for balance verification. As a critical sub-category within our balances and analytical measurement and testing ecosystems, these weights provide the physical reference standards required to ensure every measurement meets strict research and industrial quality requirements.
Why Choose Professional Calibration Weights?
Our curated collection of metrological standards is engineered for precision, durability, and strict compliance with international standards:
- High-Accuracy OIML Classes: We stock Kern E2 and F1 class weights, providing the necessary precision for calibrating everything from high-resolution analytical balances to standard precision scales.
- Durable Stainless Steel Construction: Access premium stainless steel weights designed to resist corrosion and wear, ensuring long-term stability of the mass value.
- Specialized Milligram Standards: Utilize polished plate form weights in the milligram range (e.g., 500mg) for the precise verification of sensitive analytical sensors.
- Protective Storage Solutions: Select from a variety of Kern Standard Cases and padded boxes, lined and cushioned to protect your weights from environmental damage and physical shock.
- Traceable Verification: Utilize OIML-compliant weights that support your facility's GLP and ISO documentation requirements for regular equipment testing.
LabFriend supplies calibration weights from the world-leading specialist in mass metrology:
- Kern & Sohn: Premier German manufacturer providing an exhaustive selection of individual weights and weight sets, ranging from 1mg to high-capacity industrial standards.
Regular calibration is the cornerstone of measurement integrity; to further optimize your weighing station and instrument care, we recommend exploring these related categories:
- Analytical Balances: Pair your E2 class weights with high-sensitivity instruments from Sartorius, Kern, and Mettler-Toledo.
- Weighing Accessories: Maintain your standards and samples using LLG weighing boats, BOCHEM scoops, and anti-static tools.
- Laboratory Ultrasonic Instruments: Ensure your weighing vessels are perfectly decontaminated with precision cleaners from Bandelin or Elma.
- Laboratory Clogs & Shoes: Prevent static interference during the calibration process with anti-static footwear from AS ONE.
Unsure if your high-resolution balance requires an E2 or F1 class calibration weight? Our team provides local technical support to help you find the correct weight solution with fast shipping and competitive pricing.
Frequently Asked Questions
1. What is the difference between E2 and F1 class weights?
E2 class weights are high-precision standards used for calibrating analytical balances (readability 0.1mg), while F1 class weights are intended for precision balances with slightly lower resolution.
2. Why should I store my weights in a padded case?
Even microscopic scratches or dust accumulation can change the mass of a calibration weight; using a Kern padded case ensures the weight remains within its certified tolerance.
3. Do calibration weights need to be re-certified?
Yes; for ISO-certified laboratories, weights should be periodically sent to a metrology lab for re-certification to ensure they have not drifted from their nominal value over time.
4. Can I touch calibration weights with my bare hands?
No, oils and moisture from your skin can alter the weight's mass; always use specialized tweezers or clean, lint-free gloves when handling high-precision weights.
