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Balances or scales should always be checked with reference weights that you can rely on and trust. Our accredited mass laboratories clean, calibrate and adjust your weights, then document the results in calibration certificates with details of conventional mass correction, uncertainty and traceability information according to ISO/IEC 17025.
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Single Test Weights | Weight Sets | Reference Weights and Microgram Weights | CarePac® |
High-quality OIML and ASTM Weights protected in a robust and easy-to-clean plastic container. | Expertly manufactured OIML and ASTM Weight Sets supplied in a solid easy-to-clean aluminum or plastic case. | Weights for highest metrological performance and specialized applications. | Unique solution for convenient routing testing in OIML and ASTM Weights. |
Long-Life Test Weights The finest quality stainless steel offers the highest resistance to corrosion over a weight’s lifetime. Calibration Certificate Needed? Calibration certificates document that test weights are fit-for-purpose - requested e.g. by internal quality assurance, ISO 9001, FDA or GMP. Protection and Durability Robust and easy-to-clean plastic containers maintain test-weight integrity and accuracy. | Individual Weight Sets Choose the weight set you need from 1 mg up to 5 kg. Add calibration certificates to provide reassurance that measurements can be validated at any time. Protection and Longevity Robust, easy-to-clean aluminum (OIML E1-F1) or plastic (ASTM 1-4 and OIML F1-M1) cases protect the integrity of the weights. Marking Weights with Identical Values If two weights in the set have the same nominal value, they are marked differently. | Mass Standard Calibration We offer high-grade stainless steel knob and wire weights for weight calibrations and as reference weights in mass calibration services. “E0” Reference Weights Class "E0" weights (with a higher accuracy than OIML class E1 weights) enable calibration of mass standards at the highest metrological performance. Range: 0.05 mg up to 50 kg. Microgram Weights for Specialized Applications Microgram weights (50 µg to 500 µg) offer a test weight solution beyond traditional weighing boundaries. | Efficient Routine Testing A CarePac contains everything you need for efficient balance routine testing in accordance with USP chapter 41 and GWP®. Just Two Weights According to GWP® two test weights are sufficient: at 5% capacity (repeatability) and at 100% capacity (sensitivity and eccentricity) Comprehensive Solution CarePac sets are supplied with a calibration certificate and professional weight-handling accessories so routine tests can be performed without worry. |
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Crane Test Weights / Heavy Capacity Test Weights | Grip Handle Test Weights | ||
Stackable cast iron and stainless steel weights for scales with maximum capacity of several tons. | Stainless Steel and cast iron grip handle weights for testing of scales with maximum capacity up to 200 kg. | ||
Heavy Capacity Test Weights Unique design for safe lifting | Grip Handle Weights Easy handling designed for routine testing |
High-quality OIML and ASTM Weights protected in a robust and easy-to-clean plastic container.
Expertly manufactured OIML and ASTM Weight Sets supplied in a solid easy-to-clean aluminum or plastic case.
Weights for highest metrological performance and specialized applications.
Unique solution for convenient routing testing in OIML and ASTM Weights.
Stackable cast iron and stainless steel weights for scales with maximum capacity of several tons.
Stainless Steel and cast iron grip handle weights for testing of scales with maximum capacity up to 200 kg.
Calibration Service
Service Offering
Calibrating, Passion at Work
Our unmatched global network of 14 calibration laboratories across Europe, the Americas and Asia guarantee fast and cost-effective mass calibration. Our metrology staff are passionate about their calibration work, to ensure you receive first class service as well as continuously improved results.
Using State-of-the-Art Robotic Mass Comparators
The combination of robotic technology and world-class mass comparators delivers proven reliability and outstanding measurement performance.
Scope up to 5 t
Scopes range from OIML E to M classes and ASTM classes. For heavy-duty weights, services cover all steps from re-painting to calibration, even for weights up to 5 t.
Professional Weight Cleaning
Weights up to 50 kg undergo treatment in a total of six separate customized baths. Each weight is cleaned and stabilized in a fully automated process prior to calibration to ensure uniform surface conditions.
Service
+31 344 63 83 63
Bel Service 
Deskundige service voor laboratoriumweegapparatuur – afgestemd op uw behoeften
Wij ondersteunen en onderhouden uw laboratoriumweegapparatuur gedurende het gehele productleven, van installatie tot balanskalibratie en van preventief onderhoud tot reparatie van de balans.
Kies het type apparatuur dat u gebruikt:
Publicaties
Brochure: OIML and ASTM Weights
METTLER TOLEDO's world leading expertise in metrology extends to weights, weight sets and weight calibration services. The weight portfolio covers OIML and ASTM weights from fifty micrograms to five tons in all accuracy classes. Our weights are used all over the world, not only for testing balances but also as primary standards in mass laboratories.
Guide: Routine Testing of Laboratory Balances
Consult this guide on how to perform balance routine testing correctly. Easy-to-follow material outlines how often to test, how to test and which weights to use to ensure proper balance function.
Tips & Tricks: 12 Practical Tips for Correct Weight Handling
Weights are the most frequently used and most important equipment for testing scales and balances. And as such, need to be handled with care.
Read why:
- You should store weights near the balance
- You should not touch weights with bare hands
- You should not clean weights with certain chemicals; and more.
Simply register below to download your free copy of "Correct Weight Handling—12 Practical Tips"
Webinar: Routine Testing of Weighing Systems
Routine testing of your balances and scales between scheduled calibrations helps you to maintain accuracy required by ensuring early detection of non-conformance with your weighing process requirements. The webinar deals with the test methods to establish systematic verification of the balance's performance throughout the whole life of the instrument. Based on the process risk it addresses questions such as tests procedures, frequencies and suitable test weights.
Catalog: Weighing Accessories
Every weighing application and every workplace is unique. Whether your focus is on accurate sample preparation, error-free data handling or more ergonomic processes, you can combine XPE and XS accessories to create a dedicated weighing solution which meets your precise requirements. Explore our comprehensive range of accessories for more ideas on how you could benefit.