| 2D Machine Vision Inspection | Industrial cameras, controlled lighting, image-processing software, and rule-based or AI-assisted classification | Electronic components, packaging, labels, printed parts, fasteners, molded products, and surface-finished components | Missing or misplaced features, incorrect assembly, scratches, stains, cracks visible on the surface, printing errors, color variation, and dimensional presence or absence | Approximately 30–1,200 parts/minute, depending on the product and number of cameras | Commonly about ±0.01–0.10 mm for controlled 2D dimensional checks; accuracy depends on optics, calibration, lighting, and part positioning | High speed, non-contact operation, flexible inspection recipes, and easy integration with production lines | Limited for hidden, internal, transparent, highly reflective, or heavily occluded features; results depend strongly on lighting and fixturing | Choose when defects are visible from one or more external views and high production speed is required |
| 3D Vision Inspection | Structured light, laser triangulation, stereo imaging, or time-of-flight sensing | Automotive parts, castings, welds, robotics, bin picking, machined components, and complex assemblies | Height variation, warpage, gaps, flushness, volume, surface profile, weld geometry, missing material, and incorrect part orientation | Approximately 10–300 parts/minute, depending on scanning area, resolution, and motion requirements | Typical height resolution ranges from roughly 0.02–0.50 mm in industrial applications, subject to sensor specification and surface conditions | Captures geometric information that 2D systems cannot measure and supports non-contact profile inspection | More sensitive to surface reflectivity, ambient light, vibration, occlusion, and data-processing requirements | Choose when height, depth, profile, volume, or three-dimensional assembly conditions are critical quality parameters |
| Dimensional Gauging and Laser Measurement Systems | Laser displacement sensors, optical gauges, contact probes, or coordinate measurement principles | Precision-machined parts, shafts, bearings, seals, tubes, extrusions, and formed metal components | Diameter, thickness, width, flatness, roundness, concentricity, runout, edge position, and profile deviation | Approximately 10–600 parts/minute, depending on the number of measurement points and handling method | Typical repeatability can range from a few micrometres to approximately 0.05 mm in suitable controlled conditions | Provides quantitative measurements and statistical process-control data rather than only pass/fail results | Requires stable part presentation, calibration, and control of vibration, temperature, and surface reflectivity | Choose when dimensional tolerances are central to product performance and traceable measurement data is needed |
| X-Ray Inspection Systems | Radiographic imaging using X-rays and digital detectors | Castings, batteries, electronic assemblies, sealed containers, food products, and multi-layer components | Voids, porosity, cracks, inclusions, missing internal components, solder issues, foreign objects, and fill-level abnormalities | Approximately 5–300 parts/minute, depending on product density, image quality, and safety configuration | Detectability varies with material density, thickness, geometry, contrast, and system resolution; it is generally suited to internal structural inspection | Examines internal features without cutting or destroying the product and can inspect enclosed assemblies | Higher purchase and operating costs, radiation-safety controls, slower inspection for dense products, and limited surface detail compared with optical systems | Choose when critical defects are hidden inside products or assemblies and non-destructive internal inspection is required |
| Industrial Computed Tomography Inspection | Multiple X-ray projections reconstructed into cross-sectional and three-dimensional data | Prototype validation, complex castings, additive-manufactured parts, medical components, and failure analysis | Internal porosity, wall thickness, cracks, inclusions, assembly position, dimensional deviations, and hidden geometry problems | Typically several minutes to more than one hour per part; high-speed CT cells can be faster for selected products | Provides volumetric data; achievable voxel size can range from several micrometres to hundreds of micrometres, depending on part size and system design | Offers comprehensive internal and external inspection in a single scan and supports detailed root-cause analysis | Higher capital cost, larger data volumes, longer cycle times, complex analysis, and stricter radiation-safety requirements | Choose for complex, high-value, or low-to-medium volume parts where complete internal visualization justifies the longer cycle time |
| Ultrasonic Inspection Systems | High-frequency sound waves, pulse-echo techniques, phased arrays, or guided-wave methods | Welded structures, composites, forgings, pipes, tanks, laminates, and thick metal components | Internal cracks, delamination, lack of fusion, voids, bond failures, inclusions, and material thickness variation | Approximately 1–120 parts/minute for automated handling; scanning speed depends on material, probe arrangement, and coverage | Can detect small internal discontinuities and measure thickness; performance depends on frequency, coupling, geometry, and material properties | Effective for internal flaw detection without ionizing radiation and suitable for many thick or layered materials | Often requires coupling media or specialized probes; rough surfaces, complex geometries, and highly attenuating materials can reduce performance | Choose when internal flaws in welds, composites, or thick materials must be detected without using X-rays |
| Leak Testing Machines | Pressure decay, vacuum decay, mass flow, helium, hydrogen tracer gas, or differential-pressure methods | Fuel and fluid systems, medical packaging, valves, pumps, refrigeration parts, containers, and sealed electronic products | Leaks, poor seals, blocked passages, incorrect assembly, and leakage rates above the specified limit | Approximately 5–300 parts/minute, depending on test volume, stabilization time, and required sensitivity | Test sensitivity ranges from relatively coarse production leak checks to very low leak rates with tracer-gas methods; the correct value depends on the product specification | Directly verifies functional tightness and can provide quantitative leak-rate results | Testing time may increase significantly at higher sensitivity; tooling must seal the product consistently and test conditions must be controlled | Choose when leakage can cause safety, contamination, pressure-loss, or functional failures and visual inspection is insufficient |
| Checkweighing and Combination Inspection Systems | Dynamic load cells, vision sensors, metal detection, and programmable reject mechanisms | Food, pharmaceuticals, consumer goods, packaged products, and kitted components | Underweight or overweight products, missing items, incorrect quantity, foreign metal, packaging errors, and product mix-ups | Approximately 60–600 packages/minute, depending on package size, weighing accuracy, and inspection combination | Typical weighing resolution varies from fractions of a gram to several grams, depending on conveyor speed, product mass, and equipment configuration | Supports compliance, portion control, completeness checks, and automatic removal of non-conforming products | Performance can be affected by vibration, airflow, unstable product movement, sticky products, and inconsistent packaging | Choose when product mass, package completeness, or foreign-metal detection is a primary quality or regulatory requirement |
