Colorimeter

Choose a colorimeter around the sample area, optical geometry and comparison method used in your work. Color-difference readings are most useful when the reference, sample preparation and measurement conditions are consistent.

Compare two different measurement setups

A larger aperture samples a different area; it does not guarantee a correct reading on every curved surface. Check that the sample can cover the opening and be positioned according to the model's instructions.

Compare color results on the same basis

• Use the optical geometry required by your procedure.
• Specify the reference and color-difference formula before applying a pass/fail tolerance.
• Compare repeatability only with its documented measurement conditions; it is not the same as absolute accuracy.
• Check whether color libraries, averaging, storage and reports run on the instrument or require software.

A nearest color-library result helps narrow a selection. It does not prove that a paint formula or finished product will match under every viewing condition.

For additional portable-reader choices, browse the ColorReader collection and compare each model's documented functions.