Browse our product offerings here
Test Weights for Scales & Balances
METTLER TOLEDO's world leading expertise in metrology extends to test weights, weight sets and weight calibration services. The weight portfolio covers weights according to OIML or ASTM from fifty micrograms to five tons in all accuracy classes. Our test weights are used all over the world, not only for testing balances but also as primary standards in mass laboratories.
The proprietary electrolytic polishing process for knob and wire weights in the upper class range eliminates microscopic protrusions in the weight’s surface which is far smoother compared to mechanical polishing. Thanks to the enhanced properties of the passive oxide film, long-term stability of the test weight is improved.
Choose from a comprehensive selection of test weights and related calibration services. We offer weights and services of the highest quality – even for users with limited budget. Building on many years of experience and customer feedback, our weight boxes and accessories have an unmatched reputation. Profit from short recalibration times and trustworthy services with our global network of accredited mass laboratories.
Test your balances securely, and in accordance with USP <41>, by using just two test weights to test at 5% and 100% of the capacity of each balance. Not only is this unique approach much faster, but purchasing and recalibration costs are substantially reduced. CarePacs® include tweezers, gloves and other accessories for professional weight handling.
The unique weight identification system "WeightLink™" works with the balance firmware to cross-check the weight against its calibration certificate, making it impossible to test using the wrong weight. With weight parameters transferred electronically to the balance, the system guarantees full traceability thus data integrity is given.
High-grade stainless steel knob and wire weights for balance calibration purposes and reference usage for weight comparisons. (OIML E1, E2, F1)
Stainless steel knob and sheet weights for routine testing to ensure reliable weighing processes. (OIML F1, F2, M1 and ASTM class 1, 2, 3, 4)
WeightLink™ is an innovative weight identification system that guarantees full traceability of your balance tests
Positive Tolerances Only
A far longer life span thanks to guaranteed positive tolerances
Replaced free of charge if found out of assigned OIML tolerance
Vacuum Melted Steel – Highest Material Purity
No dissolved gases and improved oxide cleanliness
Electrolytic Polishing – Best Surface Smoothness
Enhanced properties produce unmatched stability
For improved mass stability
Made in Switzerland – Solid Name, Solid Products
Traditional manufacturing meets new technologies
Cost Savings with CarePacs®
Buy only the recommended weights for routine testing
Time Savings with CarePacs®
Easy, rapid testing approach supported by SOPs
Safe Shipment and Protected Storage
Supplied in a FDA-compliant and easy to clean plastic box
Made Exclusively from Stainless Steel for Longevity
Excellent weight life span right down to the mg range
For optimized adjustment processes
Use weights with unique ID marked as a matrix code on the weight
Secure Balance Testing
Balance firmware validates certificate and weight data before starting balance test
Automatic transfer of weight parameters into balance firmware
Enriched test printout means less manual recording
Balance firmware guides through the testing process
Test weights and artifacts for specific needs such as nominal values in the microgram range, or tailored weights shaped for specific applications.
Stackable stainless steel or cast iron weights for testing of scales with capacities up to several tons. (OIML F1-M3)
For areas where milligram weights are no longer sufficient
Buoyancy and Volume Artifacts
For meeting specialized application needs
As a reference for specialized volume measurement
Service Technician Weights
For sure and productive calibration processes
Save Testing and Lifting
Standardized design for safe stacking and to fit fork lifts
Hoist-friendly design for efficient handling
Suited to Harsh Environments
Designed for heavy-duty operation under challenging conditions
Suited for industries requiring wash-down test equipment
For our weights, we source only the finest quality austenitic steel which offers the highest resistance to corrosion over the course of a weight’s lifetime. Our unique manufacturing process involves melting the steel under vacuum, traditional mechanical polishing, final stage electrolytic polishing, fully automated cleaning processes and final calibration using state-of-the-art mass comparators. The process has been perfected over years of experience to bring you accurate weights of the highest quality, with a stability that remains unmatched in the market.
This white paper will be of interest to anyone responsible for testing and maintenance of weighing equipment, in industries where strictly regulated conditions prevail, such as the pharmaceutical, biotechnology, chemical and food industries; and anyone who is highly concerned with the recording of process data.
Read to learn more.
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.
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.
METTLER TOLEDO’s ISO/IEC 17025 calibration lab in Naenikon lab is celebrating 25 years of excellence, ensuring clients capture accuracy today—and maintain accuracy tomorrow..