Welcome. What weight class do you need?
ANSI/ASTM Class 1
Provides the greatest precision. Can be used as reference standard in calibrating other weights and appropriate for calibrating high-precision analytical balances (from 0.01mg to 0.1mg).
ANSI/ASTM Class 2
Appropriate for calibrating high-precision toploading balances with readabilities ranging from 0.001g to 0.01g.
ANSI/ASTM Class 3
Appropriate for calibrating balances with moderate precision, ranging from 0.01g to 0.1g.
ANSI/ASTM Class 4
Appropriate for student use and semi-analytical weighing.
NIST Class F
Used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians. Class F weights may be used to test most accuracy class III scales, all scales of class III L or IIII, and scales not marked with a class designation.
We can assist you in selecting the weights your facility needs to meet both your usage and regulatory requirements. We can even create custom weight sets if needed.