What is Calibration Block?

There is a simple way to keep your equipment working at its optimum all the time and it is a one-word answer.  Calibration is the word.  In fact, calibration standards are frequently developed utilizing international standards because they are so important.

The comparison of measurement values given by a device under test with those of a calibration standard with known accuracy is what is referred to as calibration.  Calibration is important in all types of industries as it is what is used to check the efficiency of any test equipment.

Calibration blocks are used for calibrating machines in order to avoid mistakes.  This saves time and money and also increases the integrity of industrial processes.  In this write-up, we will define what calibration blocks are, their applications, and the advantages of using them for equipment standardization.

1. What is a Calibration Block?

 An ultrasonic calibration block is a device also called a standard that is used to check and correct the level of the accuracy of an instrument. The calibration block has a known thickness and surface finish and is made of a material that is similar to the test sample.

Defects on these calibration blocks are also supposed to be similar to defects that would occur in the test material.  Calibration blocks are available in different shapes and sizes depending on the kind of test or the test instrument it is going to be used for.

2. What’s the Application of a Calibration Block?

A good example of how a calibration block could be used is in the manufacturing industry is when machines are being calibrated before use. This ensures that they operate properly and accurately when they are put into production, and can increase efficiency by eliminating any errors during measurements.

All production and architectural industries that carry out material testing using ultrasonic gages are in fact supposed to utilize standards or calibration blocks in their normal operations.

This, therefore, means that calibration block applications range from the manufacturing to automotive industries, medical, transport, the aeronautical, and metal works industries, where these calibration blocks are used to ensure test instruments are periodically calibrated to give accurate results.

3. What’s the Advantage of Calibration Block?

Calibration blocks are made from high-quality materials that help them steer clear of being damaged during use or storage.  The fact that they are able to stay intact and unchanged means they are long-lasting and give accurate results.  Some of the other advantages of using calibration blocks for equipment calibration are;
A. Ensures the instrument achieves precise measurement to avoid errors.

B. Improving the compliance of machines to international standards

C. Calibration using calibration blocks helps save money by improving the company’s efficiency by giving accurate test results.


Calibration blocks, also known as reference blocks, should be used to calibrate test equipment and check sensitivity levels in all industrial applications that use ultrasonic testing in one way or another.  There are numerous types of calibration blocks in circulation, and each has been made to fit the equipment and the industry where it is to be utilized.

Different kinds of calibration blocks are used for different types of applications, and that is why NDT-KITS offers a full line of calibration test blocks including customized and standard blocks for angle beam calibrations and thickness calibrations of equipment.

Selecting the right kind of standard block for your business may be a challenge and NDT-KITS understands this and is always ready to help.  We have over 40 years of experience in the industry and have supplied over 100 models of customized blocks.  Our dedicated support and after-sales service team advise the client on which calibration blocks they require and work with them through the purchase and delivery process.