Surface crack testing for precise defect detection – flexible, certified, non-destructive.

Crack Testing OFR |
PT & MT Methods

Surface crack testing for precise defect detection – flexible, certified, non-destructive.

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  • non-destructive methods
  • Penetrant Testing (PT)
  • Magnetic Particle Testing (MT)
  • on-site or laboratory
Zertifikat DIN EN ISO/IEC 17025 DIN EN ISO 9001 und DIN EN ISO/IEC 17011 Akkreditierung DAKKS Zertifikat DIN EN ISO 14001:2015 Zertifikat DIN 27201-7 Inspektionsbescheinigung Bahn

Precision meets safety

How Surface Crack Testing (OFR) Works

Surface crack testing (Surface Crack Testing – OFR) is a proven method to detect even the smallest cracks and defects on material surfaces non-destructively. At Zeros GmbH, we use two highly precise methods:

  • Penetrant Testing (PT): For non-porous materials such as metals, ceramics, or plastics. The penetrant seeps into surface irregularities caused by cracks and is made visible by a developer.
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  • Magnetic Particle Testing (MT): For ferromagnetic materials. Cracks interrupt the magnetic field – fine iron powder marks the defect zones.
    Learn more

Both methods are non-destructive and can be performed either in our state-of-the-art Berlin laboratory or on-site at your location. You benefit from fast results, clearly documented test reports, and personalized advice for the appropriate testing of your components.

“Exact defect detection – where it matters.”

Contact us for a tailored solution, precisely suited to your application.

Certified Procedures

Non-destructive Methods 

Penetrant Testing (PT)

Penetrant Testing (PT)

 Magnetic Particle Testing

Magnetic Particle Testing

 Ultrasonic Testing (UT)

Ultrasonic Testing (UT)

 Radiographic Testing

Radiographic Testing
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The testing laboratory meets the requirements according to DIN EN ISO/IEC 17025.

FAQ

Frequently Asked Questions

Surface Crack Testing OFR

Principles, Methods & Procedure of Crack Testing

Illustration of crack visualization during a penetrant test.
High-precision non-destructive testing methods

Crack testing is applied wherever high material integrity is crucial. Our testing methods offer top quality and traceability — for safety you can see.

Example: Procedure of Penetrant Testing (PT)
  1. 1. Component Preparation

    The surface is thoroughly cleaned and degreased to remove contaminants.

  2. 2. Application of Testing Agent

    The liquid penetrant is applied to the surface and seeps into the smallest cracks and defects.

  3. 3. Penetration Time & Cleaning

    After a defined penetration time, excess testing agent is removed from the surface.

  4. 4. Developer Application

    A special developer is sprayed on, which draws the penetrant remaining in the crack to the surface and makes it visible.

  5. 5. Evaluation & Documentation

    The test surface is visually inspected under suitable lighting conditions, and the results are recorded in a digital test report.

Typical Applications
  • Industrial components and castings
  • Metal construction and manufacturing
  • Container construction, steel structures
  • Machine housings and safety-critical components