Precision Test Weights with Calibration Certificate
Class 1
Class 4
Often used to calibrate precision scales, these highly accurate test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They are marked with their weight.
Class 1 weights are highly accurate and used as a reference standard for calibrating other calibration weights. They are also good for calibration of microbalances and analytical balances.
Class 4 weights are good for calibrating precision balances, laboratory balances, and digital scales.
Precision Test Weights
1,000 g to 5 kg
Our most accurate test weights, these are often used to calibrate precision scales. They are marked with their weight.
For technical drawings and 3-D models, click on a part number.
| Wt. | Tolerance | Dia. | Ht. | Material | Class | Specifications Met | Includes | Each | |
| 4 kg | -0.000975 kg to 0.000975 kg | 3" | 4 9/16" | Stainless Steel | 1 | ASTM E617 Class 1 | Glove; Plastic Case | 00000000 | 0000000 |