How to identify the class of a weight

If you need to determine what class of weight you have, for example when requesting a quote for weight calibration, you can use the below guidance:

Class E2: Constructed of stainless steel and there are no markings on the weight.

Class F1 or F2: Constructed of stainless steel, the weight will be marked with the denomination (for example a 1kg will be marked “1” or may also have an F: “1F”)

Class M1: Constructed of stainless steel or brass, the weight will be marked with the denomination + M (For example a 1kg will be marked “1 M” or “1kg M”)

All iron weights are class M1

If you are still unsure, you can send the weights to us for calibration and request we identify them for you on the mass calibration form.