Calibration blocks for ultrasonic thickness gauge are available with 4 step, 5 step, 6 step and 10 step in millimeter and inch.

Calibration Block Specification

Tips: Why you need a calibration block for ultrasonic thickness gauge?

The ultrasonic thickness gauge is used to accurately measure the thickness of different materials under different conditions. In order to meet the requirements of the maximum accuracy measurement, a set of reference test blocks or calibration block will be very important. The closer the material of the calibration block is to the material to be tested, the more accurate the measurement. The ideal reference test block is a set of test pieces of different thicknesses of the material to be tested. The calibration block can offer the UT instrument compensation correction factors.

In most cases, using one calibration block can obtain satisfactory measurement accuracy. This reference test block should have the same material and similar thickness as the tested material.

For thin materials, when its thickness is close to the lower limit of probe measurement, the calibration block can be used to determine the exact lower limit. Do not measure materials below the lower limit of thickness. If a thickness range can be estimated, the upper limit should be chosen for the thickness of the calibration block.

As for the thick material to be tested, especially for alloys with complex internal structures, the one among the reference block that is close to the tested material should be selected, so as to facilitate calibration.