Industrial videoscopy (RVI, Remote Visual Inspection) allows cavities, piping, turbines and internal volumes to be inspected without disassembling the component and without direct operator access. The right videoscope is not "the most expensive one", but the one whose probe actually reaches where needed and delivers image quality matching the acceptance criterion.
The choice always starts from the access geometry and the inspection objective: looking, documenting or measuring a defect are different needs.
Borescope, videoscope, video endoscope
A classic optical borescope is viewed directly with the eye and suits short, straight accesses. A videoscope (or video endoscope) integrates a micro-camera at the tip and shows the image on a screen: it enables recording, measurement, probe articulation and result sharing. For industrial remote visual inspection, the videoscope is today the operating standard.
The real selection criteria
| Criterion | What to evaluate |
|---|---|
| Probe diameter | Must pass through the narrowest access: holes, nozzles, tubes. Small diameters go everywhere but limit optics and light. |
| Probe length | Must reach the farthest point respecting bend radii, without forcing. |
| Articulation | 2- or 4-way tip bending, range and precision: essential to explore cavities and negotiate bends. |
| Optical resolution | Sensor, optics and real sharpness at the probe tip, not just declared megapixels. |
| Illumination | Light power and uniformity (LED) for deep cavities and low-reflectance surfaces. |
| 3D / stereo measurement | To quantify defects (length, area, depth) directly from the image. |
| Ruggedness | Fluid sealing, temperature, resistance to oil/fuel and aggressive environments. |
Diameter, length and articulation
The first constraint is physical: the probe must enter through the available access and reach the area to inspect respecting bend radii. A small diameter passes everywhere but leaves less room for optics and illumination; a larger diameter gives better images but may not fit. Articulation (2- or 4-way tip bending) determines the ability to "look around" inside cavities and to negotiate bends and branches.
Optics, illumination and measurement
Image quality does not depend on declared megapixels alone: sensor, optics, real sharpness at the tip and, above all, illumination matter — the latter often being the real limitation in deep cavities. When the acceptance criterion requires a dimension (crack length, corrosion depth, FOD size), 3D measurement is needed — stereo or pattern projection — quantifying the defect directly from the image.
Ruggedness and environment
Videoscopy often works in harsh environments: engines, turbines, piping with oil or fuel residues, high temperatures. Fluid sealing, chemical resistance and probe ruggedness determine instrument life and the reliability of inspections repeated over time.
Typical applications
- Turbines and aero engines: blade inspection, combustion chambers, MRO.
- Welds and internal components: visual verification of joints and non-accessible surfaces.
- Piping and heat exchangers: corrosion, deposits, cracks and blockages.
- Tanks and confined spaces: internal inspection without direct operator entry.
- Castings and mechanical parts: internal cavity control and FOD search.
To explore the instrument and configurations, see the PITECH industrial videoscopy RVI page. PITECH can support a neutral technical-commercial assessment, starting from the real access and inspection objective before proposing the most coherent configuration.
Frequently asked questions about industrial videoscopes
What is the difference between a borescope, a videoscope and a video endoscope?
A classic borescope is optical and viewed with the eye. A videoscope (or video endoscope) integrates a micro-camera at the tip and shows the image on a screen, with recording, measurement, articulation and sharing. For industrial RVI the videoscope is the standard.
How do I choose probe diameter and length?
The diameter must pass through the narrowest access (holes, nozzles, tubes); the length must reach the farthest point respecting bend radii. Small diameters go everywhere but limit optics and illumination: it is always a compromise driven by the real geometry.
What is 3D or stereo measurement used for?
3D measurement (stereo or pattern projection) quantifies defects, distances, areas and depths from the image, without removing the component. It is needed when the acceptance criterion requires a dimension, not just a visual observation.
Is a videoscope suitable for confined spaces?
Yes: it allows cavities, piping and internal volumes to be inspected without direct operator access, reducing confined-space entries and downtime. Ruggedness, fluid sealing and resistance to temperature and aggressive environments matter.
How do I request an RVI evaluation from PITECH?
Provide what to inspect (turbine, weld, pipe, tank), available access and diameter, distance to reach and whether defects must be measured. With this PITECH guides the most suitable configuration. Form, WhatsApp or info@pitech-solution.com.