Whether a ferromagnetic component contains surface or near-surface…
visible wet or dry magnetic-particle inspection
Material Properties · Physical Properties
Magnetic Particle Inspection (MPI)
Detect surface and near-surface discontinuities in ferromagnetic components using magnetic-particle inspection, with the magnetisation route, surface condition and reporting basis agreed before work begins.
- Price
- from£30 per sample, excl. VAT
- Turnaround
- 5 working days Preparation and scope dependent
- Available platforms
- Magnaflux D-2060 Wet Bench
- Typical outputs
- Annotated indication images and inspection-area recordIndication location, orientation and measured length where practicableInspection method, magnetisation direction and acceptance notesMeasured property values
Why this service
What MPI can help you understand
Magnetic Particle Inspection (MPI) uses an applied magnetic field and visible or fluorescent particles to reveal flux leakage caused by surface-breaking and near-surface discontinuities in ferromagnetic…
The location, orientation and indication length of detected…
fluorescent wet magnetic-particle inspection
Whether the inspected area meets an agreed drawing, procedure or…
procedure-based inspection with recorded acceptance assessment
Choose the scope
Start from the question, not the tool
The method, preparation route and reporting depth depend on what you need to decide.
Visible wet or dry magnetic-particle inspection
whether a ferromagnetic component contains surface or near-surface cracking
- Best used when
- whether a ferromagnetic component contains surface or near-surface cracking
- Typical result
- Annotated indication images and inspection-area record
- Preparation note
- Exact mass and any drying or dispersion step are confirmed after technical review.
Fluorescent wet magnetic-particle inspection
the location, orientation and indication length of detected discontinuities
- Best used when
- the location, orientation and indication length of detected discontinuities
- Typical result
- Indication location, orientation and measured length where practicable
- Preparation note
- State the substrate, nominal thickness and whether sectioning or mounting is permitted.
Procedure-based inspection with recorded acceptance assessment
whether the inspected area meets an agreed drawing, procedure or acceptance criterion
- Best used when
- whether the inspected area meets an agreed drawing, procedure or acceptance criterion
- Typical result
- Inspection method, magnetisation direction and acceptance notes
- Preparation note
- Confirm power, connections, operating state, access restrictions and permitted disassembly.
Common outputs
A result package matched to the decision you need to make
Fields, conditions, processing and file formats are confirmed before work begins.
Annotated indication images and inspection-area record reported with the agreed units, sample reference and measurement conditions.
Indication location, orientation and measured length where practicable supplied in a labelled format suitable for direct sample or condition comparison.
Inspection method, magnetisation direction and acceptance notes provided with the processing basis and quality checks agreed during technical review.
Measured property values included when selected in the confirmed reporting scope.
Sample requirements
What to provide before work begins
Provide representative, clearly labelled samples and identify the decision, feature or comparison that matters.
| Suitable sample | Submission requirement | Planning note |
|---|---|---|
| Powder / particles | Provide a dry, homogeneous and clearly labelled sample in a sealed container. | Exact mass and any drying or dispersion step are confirmed after technical review. |
| Film / coating | Provide the coated substrate or a flat film with the test surface and coating side clearly marked. | State the substrate, nominal thickness and whether sectioning or mounting is permitted. |
| Device / assembly | Provide a complete labelled device or assembly with drawings, interfaces and operating limits. | Confirm power, connections, operating state, access restrictions and permitted disassembly. |
| Solid / component | Provide a clean, stable and clearly labelled specimen with the target face or region identified. | Confirm dimensions, cutting permission and whether the original geometry must be preserved. |
Objective: state the decision, comparison or acceptance criterion the work must support.
Handling and access: declare hazards, instability, confidentiality, file constraints or special logistics before dispatch or transfer.
Questions and answers
Common planning decisions
Short answers to issues that can change preparation, scope, timing or interpretation.
What should I send for Magnetic Particle Inspection (MPI)?
Provide powder / particles, film / coating, device / assembly, solid / component as applicable. Exact quantity, dimensions and preparation are confirmed during technical review.
Which scope should I choose?
Choose the scope that matches the decision, comparison and reporting depth you need; TESTDOG confirms the final route after technical review.
What will I receive?
Typical outputs include annotated indication images and inspection-area record, indication location, orientation and measured length where practicable, inspection method, magnetisation direction and acceptance notes. Final files follow the confirmed reporting scope.
How long will it take?
Typical turnaround is 5 working days after sample acceptance and method confirmation.
Configure the service
Send the information needed to scope MPI correctly
- Sample form, material, dimensions and quantity
- Feature or decision the result must address
- Required comparison, acceptance criterion or reference
- Preferred output and reporting depth