Based on the principle of Leeb hardness measurement, the Leeb Hardness Tester, otherwise called as Leeb Rebound Hardness Tester, is considered as one of the most commonly used tools to test the hardness of the metal. It is a type of non-destructive testing tool used to inspect large sized workpieces weighing above 5 kg. Besides the hardness, it also measures the strength of materials. 

Linshang Leeb Hardness Tester is suitable for testing various metal materials such as alloy steel, stainless steel, gray cast iron, ductile iron, etc.

LS251D Leeb Hardness Tester

Suitable for measuring iron, copper, steel and other metal materials

Using advanced digital probe technology, test accurately

The probe has a built-in direction sensor to automatically compensate the measurement errors in different impact directions

A variety of hardness scales switchable, eliminating the tedious manual check table

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LS252D Leeb Hardness Tester

Pen-type Leeb hardness tester

Dual-coil technology

Extraordinary accuracy:±6HL

Perfect for quick and reliable testing on site

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LS252DC Leeb Hardness Tester

Integrated handheld hardness tester

Spring loaded with a special loading stick

Dual-coil technology

Extraordinary accuracy:±6HL


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LS252DL Leeb Hardness Tester

Adopt impact device DL

Suitable for hardness measurement in confined spaces such as grooves and gears

Advanced dual coil technology for good repeatability and high accuracy

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LS252C Leeb Hardness Tester

Adopt Impact device C

Ideal for testing the hardness of surface hardening layers and parts with small masses or thin thicknesses

Dual coil technology for good measurement accuracy and repeatability

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What is the meaning of hardness?

Hardness is a feature of a given object, and not a basic physical property. Hardness is defined as the ability of a material that resist partially a hard object being pressed into its surface.

In a nutshell, the lesser the indentation, the harder the object.

How to measure hardness by Leeb hardness Tester?

In the Leeb hardness testing method, the hardness value can be calculated from the energy loss of an impact body after impacting upon a metal. This Leeb quotient is equivalent to the measure of that energy loss due to deformation. The impact body rebounds faster from harder samples than the softer ones, resulting in a larger value 1000* vr / vi which is quoted as the Leeb rebound hardness unit HL.

When an impact device accelerates an impact body with the help of spring force, the velocity of the impact body gets segregated into three phases:

Approach phase

Here, the impact body is accelerated in the direction of the test surface with the help of the spring force.

Impact phase

In this phase, the impact body as well as the specimen remain in direct contact. The specimen gets plastically or elastically deformed and the impact body comes to the standstill. This elastic spring-back nature of the impact body, as well as the specimen, helps the impact body to rebound.

Rebound phase

Here, the impact body is again accelerated out of the impact phase with the resultant energy.

What is the application of Leeb Hardness Tester?

There are various applications of Leeb hardness testers:

  • Measure the die cavity of molds, bearings, heavy work pieces, as well as other parts

  • Analyzed the installed machineries as well as the permanently assembled parts

  • Identify the material in the warehouse of metallic samples

  • Detecting the surface of a small hollow space

  • A quick inspection in large range as well as multiple measuring areas for large scale workpiece.

What are the advantages of Linshang Leeb Hardness Tester?

Unlike the bench testers, portable hardness testers are smaller in size with lightweight. These testers are compact in nature, which determines the hardness using various hardness scales. Moreover, the modern portable hardness testers can detect the hardness by employing all hardness scales. Its major advantages include user convenience as well as portability. There is no need to carry samples into the testing units or workshops. Linshang Portable Leeb Hardness Tester uses cutting-edge digital technology that the digital signal processing is completed directly on the probe. And it can automatically detect the type of impact devices by testing at any angle, even in upside down position.