Hardness Depth Tester P3123
Induction Hardening, Induktionshärten, SHD, Surface Hardening Depth, Hardness Depth, CHD, Case Hardening Depth, Case Depth, nondestructive testing, Eddy Current, Härtetiefe, Rht, Randschichthärtetiefe, Randschichthärten, Hardness Depth Tester P3123, P3123, Härtetiefenprüfgerät, Induktionshärten, Q NET, Quality Network
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Hardness Depth Tester P3123



Surface hardening improves the wear resistance and fatigue strength of dynamically stressed components. These functional characteristics are mainly determined by surface hardness, hardening depth and residual stress.

An essential quality feature of the surface hardening process is the thickness of the hardened layer (SHD). Currently, the hardened layer can only be tested in random samples using destructive methods, a procedure that is both costly and time-consuming. More Information.



In cooperation with the Fraunhofer Institute for Non-Destructive Testing (IZFP), we have developed an ultrasonic test instrument for fast and easy SHD control. Reduced efforts and costs for testing facilitate rapid production control for a consistently high level of quality. The test instrument is used to optimize manufacturing parameters, reduce downtimes after inductor changes, for production monitoring and quality control.


short setup times

simple, uncomplicated calibration

fast and easy scanning

high test sensitivity

comfortable sensor handling

sensor adaptable to complex geometries

visualization of the current test point

testing at small radii and undercuts possible

individual report templates

storage of results in data base

analysis and revaluation of test results

line scans and circumferential scans

automation possible



The test method is based on the effect that the hardened layer is almost transparent to ultrasonic waves while the non-hardened material scatters them back. The backscattered signal received by a probe, is processed by the UT hardware and automatically evaluated by the software. The Surface Hardening Depth (SHD) is calculated and displayed by the software.


In most cases the results comply with the results of destructive methods. SHD values > 1.2 mm are determined using standard equipment. Lower SHDs can be tested with special probe systems.

Ultrasonic Backscatter Technique

Figure: Ultrasonic Backscatter Technique


Dipl.-Ing. Tobias Müller
Phone: + 49 (0) 681/9767153
Fax: + 49 (0) 681/9767158



•    4 ultrasonic channels
•    built for industrial use (IP65)
•    portable for mobile use
•    inspection frequencies: 5 – 25 MHz
•    measurement repeatability: ± 0.2 mm


Testing Software “SHD-Studio”

•    setup mode
•    custom test programs
•    import / export of test programs
•    tools for visualization and analysis of test results
•    individual test reports

Testing Software “SHD-Studio”