E1 vs E2 vs F1 Weight Guide

Calibration weights are classified according to OIML standards.

E1 Class

Applications
1.) Mass laboratories.
2.) Reference standards.

Advantages
1.) Highest accuracy.
2.) Lowest tolerance.

E2 Class

Applications
1.) Analytical balances.
2.) Calibration laboratories.

Advantages
1.) Excellent precision.
2.) Suitable for 0.1mg balances.

F1 Class

Applications
1.) Precision balances.
2.) Industrial laboratories.

Advantages
1.) Cost effective.
2.) Widely used.

Quick Comparison

E1 > E2 > F1 > F2 > M1

Selection Rule

Higher accuracy balances require higher accuracy calibration weights.