Ultraviolet Light Inspection
Use controlled UV-A viewing to identify qualifying fluorescent residue or support a clearly defined inspection method.
UV-A is a viewing tool—not a universal contamination or defect detector.
Certain hydrocarbons, penetrants, tracers, dyes, coatings, and other substances fluoresce when exposed to ultraviolet-A radiation. Haygor’s published oxygen-cleaning procedure uses a white-light inspection followed by controlled black-light viewing to look for qualifying fluorescent residue on cleaned components.
UV-A alone cannot prove that every contaminant has been removed, find cracks without a complete fluorescent penetrant process, or establish leak tightness without a compatible tracer and test setup. The inspection objective, preparation, lamp conditions, ambient light, background fluorescence, acceptance criteria, and inspector responsibilities must be defined.
Match the viewing method to the inspection question.
A useful indication depends on the target material, surface access, background, preparation, and written acceptance criteria.
White-Light Precheck
Inspect for visible moisture, grease, oil, lint, particulate, staining, damage, and preparation condition.
Direct Surface Viewing
Examine accessible surfaces under controlled UV-A and ambient-light conditions.
Swab Examination
Sample inaccessible surfaces using an approved clean swab and viewing method.
Recovered-Fluid Review
Compare qualifying rinse or solvent samples with a known-clean reference when the procedure permits.
Fluorescent Penetrant Support
Provide controlled viewing only as part of a complete approved penetrant-testing process.
Tracer-Assisted Leak Viewing
Use UV-A only when a compatible fluorescent tracer and defined leak-test method are supplied.
Control the preparation, environment, viewing, and disposition.
The specific wavelength, irradiance, ambient-light limit, adaptation time, distance, and verification checks come from the governing procedure.
Define the objective
Distinguish cleanliness inspection, penetrant testing, tracer leak inspection, or another method.
Prepare the item
Complete required cleaning, drying, penetrant, tracer, swab, or sample preparation.
Verify equipment
Confirm lamp type, condition, output checks, filters, calibration status, and safety controls.
Control the environment
Establish ambient-light limits, viewing distance, dark adaptation, and clean inspection area.
Inspect & record
Examine the defined surfaces or samples and document location, character, and extent of indications.
Disposition the result
Accept, re-clean, re-test, investigate, repair, or reject under the written criteria.
Define what fluorescence is expected to reveal.
The same indication can have different meaning depending on the material, surface finish, and method.
Background fluorescence and naturally fluorescent materials can also create indications. Use UV-A as one element of a defined inspection program and pair it with other methods when the acceptance decision requires them.
- Inspection objective, component identification, material, finish, coating, geometry, and accessible surfaces
- Preparation method, cleaning history, penetrant or tracer system, swab, recovered fluid, and references
- Governing procedure, wavelength, irradiance, ambient-light limit, dark adaptation, and viewing distance
- Known background fluorescence, false-indication controls, surface temperature, and environmental restrictions
- Acceptance criteria, inspector qualification, photography, reporting, witness, and record-retention needs
- Re-cleaning, repair, reinspection, leak-test, penetrant-test, packaging, and turnaround requirements
Build the complete Haygor service route.
Connect this service with related cleaning, machining, repair, calibration, coating, or assembly work when the application requires a broader scope.
Send the inspection objective, preparation, conditions, and acceptance criteria.
Haygor can distinguish the appropriate fluorescence-cleanliness, penetrant-support, or tracer-assisted scope.