Calibration Weights

Our calibration weights are available individually or as complete sets, with accuracy grades for verifying everything from shipping scales to research balances. We carry ANYLOAD F1 and M1 grade weights in the following ranges:

• M1 grade (stainless steel and cast iron) from 5 g to 500 kg and 25–50 lb.
• F1 grade (stainless steel) from 0.05 g to 20 kg.

F1 vs. M1 Calibration Weights: Which Do You Need?

F1 and M1 denote accuracy classes defined by the OIML R111 standard. F1 weights have tighter tolerances for calibrating high-precision balances and laboratory scales. M1 weights are ideal for verifying industrial and commercial scales, such as bench, floor, and platform scales.

Stainless steel resists corrosion and suits clean environments, while cast iron is a cost-effective option for heavy test loads. To see how accuracy classes apply to the load cells inside your scale, read our guide, Load Cell Classes: OIML Requirements.

Ordering through our online store is simple, fast, and secure. For any questions about calibration and our related services, please contact us or see our article, Calibrating the Force Measuring System.