Universal hardness tester ADL DU 120 Mini

ADL DU 120 Mini

Universal hardness tester is designed for measuring the hardness of metal products. The device uses two methods for measuring hardness – ultrasonic and dynamic.



Parameter Value
Measurement range on the main scales
Rockwell 20 – 70 HRC
Brinell 30 – 650 НВ
Vickers 230 – 940 ХВ
Measurement uncertainty (regulated by ISO standards)
Rockwell 2 HRC
Brinell, in the range:
90-180 HB
180-250 HB
250-460 HB
10 НВ

15 НВ 20 НВ

Vickers, in the range:
240-500 HV
500-800 HV
800-940 HV
15 ХВ 20 ХВ

25 ХВ

Diameter of the area for installing the sensor
For ultrasonic sensor: from 1 mm on the plane,
from 5 mm into a blind hole (groove)
For dynamic sensor: from 10 mm on the plane
Roughness (different sensors can work with different product roughness)
Ultrasonic 1.6 Ra
Dynamic for type “D” sensor – 3.2 Ra for “G” type sensor – 7.2 Ra
for type “E” sensor – 1.6 Ra
Main technical characteristics
Scale conversion You can convert measured hardness to different scales
Programmable scales Up to 20 additional scales
Algorithm for discarding false readings (for higher reading accuracy) Yes
Calculation Average value for 3 – 20 measurements Minimum, maximum, average value
Finding incorrect measurement results
Operating temperature – 20 … +45 °С
Display LCD TFT 2.4”, 240×320 px
Language Ukrainian, English, Russian
Connect to PC USB-C, configuration and processing
Device power supply Built-in battery
Dimensions 141×73×32mm
Weight 0.3 kg


ADL DU 120 Mini in Uzbekistan, Tashkent

Easy to use, universal in capabilities, multifunctional in use and reliable in operation!

ADL DU120 Mini is a universal hardness tester designed for measuring the hardness of metal products. The device uses two methods of hardness measurement – ultrasonic and dynamic, which makes it effective and versatile for quality control of materials in various tasks, including input, interaction and output quality control of materials.

The hardness tester is suitable for measuring the hardness of carbon and structural steels, surface-hardened products, heat-resistant, corrosion-resistant, stainless steels, galvanic coatings, surfacing, products of complex configurations, thin-walled and compact products.

The ADL DU120 Mini features the Leeb scale as well as standard hardness calibrations for Rockwell, Vickers, Brinell and Shore. Additional scales for different materials can also be added, including through the one-point calibration function. This significantly increases the accuracy of measurements for specific materials and distinguishes it from analogues.

The ADL DU120 Mini also has the ability to store up to 20 user scales and view the entire plant’s measurement history. The built-in algorithm for automatic processing of outlier values and control of specified ranges increases the accuracy and reliability of material hardness measurements.


The dynamic sensor allows you to measure the hardness of solid objects with poorly prepared and coarse-grained surfaces. For such objects, a dynamic G-type sensor is recommended because it has low sensitivity to object curvature and surface roughness.

Additionally, the device can be equipped with additional replaceable sensors of various sizes, spring stiffness and indenter hardness.


The ultrasonic sensor allows you to measure the hardness of grooves, surfaces with a small radius, hard-to-reach areas, products of complex shapes, and small parts.

It is ideal for measuring the hardness of mirror surfaces of shaft journals, blades, and gear teeth due to the small indenter area.

Features of the ADL DU120 mini hardness tester:

  • The device body is protected from dust and moisture.
  • The device’s intuitive interface allows you to start working immediately after turning it on.
  • Color display with adjustable backlight shows bright and clear measurement results even in low light or strong sunlight.
  • The device notifies the user when the measurement results exceed the specified values.
  • A unique statistical data processing system provides quick analysis of measurement results.
  • Single point calibration function.
  • The device can store up to 20 user scales and the history of all measurements, as well as the date and time of the test.
  • Reliable operation of the device in various climatic conditions.
  • Shock-resistant housing, protection against accidental drops from a height of up to 1.5 meters.

The Universal Hardness Tester ADL DU 120 Mini is a specialized instrument used for measuring the hardness of materials, similar to the previously mentioned ADL-DU110. Here’s some specific information about the ADL DU 120 Mini:

  1. Universal Hardness Testing: Like its larger counterpart, the ADL DU 120 Mini is capable of performing various hardness testing methods, including Brinell, Rockwell, Vickers, and Knoop hardness tests.
  2. Model Name: “ADL DU 120 Mini” denotes the model number or designation of this particular universal hardness tester. The “Mini” designation likely suggests a more compact and portable design compared to larger models.
  3. Testing Methods: The device supports multiple hardness testing methods, each suitable for different materials and applications:
    • Brinell Hardness Test: Measures the hardness of materials by pressing a hard steel or carbide ball into the surface.
    • Rockwell Hardness Test: Measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load).
    • Vickers Hardness Test: Measures the hardness of materials by pressing a pyramidal diamond indenter into the surface.
    • Knoop Hardness Test: Measures the hardness of materials using a pyramidal diamond indenter, primarily used for measuring the hardness of thin materials or small parts.
  4. Measurement Range: The ADL DU 120 Mini would have a specified measurement range for each testing method, indicating the range of hardness values it can accurately measure.
  5. Accuracy and Precision: The specifications would include the device’s accuracy and precision in measuring hardness, typically expressed as a percentage of the measured value or in specific units corresponding to each testing method.
  6. Display and Controls: It would feature a display screen to show measurement readings and settings, along with controls and buttons for operation and configuration.
  7. Applications: The ADL DU 120 Mini can be used in various industries such as manufacturing, metallurgy, automotive, aerospace, and quality control to assess the hardness of metals, alloys, plastics, ceramics, and other materials.
  8. Portability: As indicated by the “Mini” designation, this hardness tester is likely designed to be more compact and portable than larger models, making it suitable for on-site testing and field applications.
  9. Calibration: Like other hardness testers, the ADL DU 120 Mini would require periodic calibration to ensure accurate measurements. Calibration instructions would likely be provided by the manufacturer.
  10. Accessories: The universal hardness tester may come with accessories such as indenters, anvils, calibration standards, and software for data analysis and reporting.

Overall, the Universal Hardness Tester ADL DU 120 Mini is a versatile and portable tool for assessing the hardness of various materials using different testing methods.

Other products in category  Mechanical tests