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Reliable balance testing begins with high quality test weights. Our expertly manufactured weights enable efficient and effective routine testing of weighing instruments.

Choose our OIML or ASTM test weights to check the performance of your weighing device in the range from 50 micrograms to five tons in all accuracy classes, with or without a calibration certificate.

How you handle, clean and store test weights can make a sizeable difference to the ongoing accuracy of your weighing processes. Choose professional accessories for weight handling from METTLER TOLEDO!
The selection of test weights depends on the degree of accuracy needed to satisfy your specific process tolerance. Our free GWP® Recommendation service specifies the correct test weights and weight class to use to check the performance of your weighing device.
How to handle test weights? Download the free weight handling poster and learn more about how to use, clean and store precision and calibration weights.
This guide contains tips for handling test weights that are vital for maintaining weight accuracy long-term. It offers essential resources for effective routine balance testing.
How you handle, clean and store test weights can make a big difference in the accuracy of your weighing processes. Test weights must be handled with care.
Accredited calibration laboratories around the world clean, calibrate and adjust weights and then document the results in a calibration certificate. With our global network of accredited mass calibration laboratories, you can be sure of trustworthy calibration services and benefit from short weight-recalibration times.
GWP® Verification assesses if the measured performance of your balance or scale satisfies your specific process and quality requirements. It documents the measurement range in which you can operate your equipment to achieve accurate and reproducible results. If a device does not achieve target performance, GWP® Verification recommends immediate measures to recover its accuracy.
