The graphic ultrasonic thickness gauge is a professional instrument for non-destructive thickness measurement, developed for applications where a simple numerical reading is not enough and a more detailed evaluation of signal behaviour and thickness variation across the inspected component is required.
The large color graphic display makes measurements easier to manage and provides useful information during inspection. This makes the graphic ultrasonic thickness gauge particularly suitable for professional inspections on pipelines, tanks, vessels, boilers, bulkheads, watertight compartments, fabricated structures and metal components that are subject to corrosion, wear or localised thickness reduction.
Like the other instruments in the range, measurements can be taken from one side of the component. Used with coupling gel, the probe transmits the ultrasonic pulse through the material and the instrument determines thickness from the return signal. This is essential where the opposite side cannot be accessed, such as on installed pipelines, closed tanks, bulkheads or structures that are in service.
One of the main features of this model is the through-coating mode, which allows the thickness of the metallic material to be measured while excluding the painted layer or insulating surface coating from the reading, without needing to remove the coating at the inspection point. This function is particularly useful for maintenance and corrosion-monitoring activities on painted or insulated components.
Compared with the through coating gauge intended for more immediate inspections, the graphic model offers a wider through-coating application range and can also operate with thicker insulating coatings, within the limits specified in the technical data sheet. It is therefore suitable where inspection beneath a coating must be combined with more advanced analysis functions, greater storage capacity and more complete management of recorded data.
The A-scan mode displays the waveform of the ultrasonic signal at the measurement point. The operator can therefore observe the echoes received by the probe and evaluate the quality of the signal used to determine thickness. A-scan can also help identify signal variations or anomalies that may be associated with discontinuities, inclusions or internal defects, which must be evaluated according to the material, component geometry and inspection procedure.
The B-scan mode provides a graphical representation of thickness variation along a scanned area. By moving the probe across an area of the component, the operator can visualise changes in thickness, identify localised thinning and better understand the distribution of corrosion or material loss. This function is particularly useful when a series of numerical readings alone would not adequately describe the inspected area.
In addition to thickness measurement, the model can manage minimum and maximum value capture, the difference from a reference value and percentage reduction. These functions provide a more complete assessment of remaining thickness, particularly during periodic checks on components subject to deterioration or where the most critical areas must be identified quickly.
The alarm function allows minimum and maximum acceptance thresholds to be set. When the measured value exceeds the established limits, the waveform changes color on the display, making it easier to immediately identify areas requiring further investigation. This is useful for repeated inspections and in processes where comparison with limit values must be quick and easy for the operator to interpret.
Internal memory allows a very large number of readings to be stored, together with waveforms, which is important where inspections must be documented, compared over time or analysed later. The data output allows connection to software for measurement collection, improving traceability and reducing transcription errors in quality-control processes. On this model, cable and software are included as standard.
A wide selection of optional probes makes it possible to adapt the instrument to different operating conditions. In addition to the probe for through-coating measurement, other probes are available for smaller measurement points, lower thicknesses, high-temperature surfaces or wider measurement ranges. This flexibility makes the instrument suitable for different requirements, from industrial maintenance to laboratory and production inspections.
The graphic ultrasonic thickness is therefore designed for inspections requiring more than a simple thickness value: measurement on painted surfaces, graphical signal analysis, assessment of thickness variation, investigation of possible anomalies, management of inspection thresholds and structured data storage. A calibration report is available upon request.
Applications
- Non-destructive thickness inspection on metallic components that are accessible from one side only
- Measurement of base-material thickness beneath paint or insulating coatings using Through Coating mode
- Corrosion inspection on painted pipelines, tanks, vessels and coated structures
- Inspection of bulkheads, watertight compartments and metal structures in marine applications
- Inspection of boilers, fire extinguishers, fabricated structures and components protected by anticorrosion coating systems
- Ultrasonic signal display using A-scan mode
- Analysis of thickness variation along the scan using B-scan mode
- Further assessment of signal indications or anomalies compatible with discontinuities, inclusions or internal defects
- Detection of localised thinning through minimum and maximum value capture
- Evaluation of thickness difference and percentage material reduction
- Inspections with minimum and maximum alarm thresholds
- Storage of readings and waveforms for documented inspections and comparison over time
- Measurement collection and management using the supplied cable and software
- Use with dedicated probes for small measurement points, high temperatures, low thicknesses or wider measurement ranges
- Inspections supported by a calibration report available upon request
FAQ – Graphic ultrasonic thickness gauge
What is a graphic ultrasonic thickness gauge used for?
It is used to measure the thickness of a component non-destructively and to display the signal and measurement trend graphically. It is suitable where inspection requires more complete analysis than a simple numerical thickness reading.
What is the difference compared with a non-graphic through coating ultrasonic thickness gauge?
Both instruments can measure metallic material beneath paint or insulating coatings. The graphic model offers a wider through-coating range, can work with thicker coatings and adds A-scan, B-scan, alarms, high memory capacity and waveform storage.
What is the application range of through-coating mode?
With the probe intended for this function, Through Coating mode can measure metallic substrates from 3 to 50 mm beneath insulating coatings with a thickness of less than 8 mm. Full values and application conditions are provided in the instrument technical data sheet.
What can A-scan mode display?
A-scan displays the echoes of the ultrasonic signal at the inspection point. This representation makes it easier to assess signal quality for thickness measurement and can help identify indications or anomalies that are compatible with discontinuities, inclusions or internal defects.
Can A-scan automatically detect every internal defect?
No. A-scan provides useful information on signal behaviour and displays the back-wall echo, helping identify anomalies that may require further assessment. Interpretation depends on the material, geometry, probe used, inspection procedure and operator experience.
What is B-scan mode used for?
B-scan displays thickness variation along the measurement path. It is useful for visualising localised reductions, following changes along a surface and identifying areas affected by corrosion or material loss more clearly.
Can thickness be measured from one side of the component only?
Yes. Ultrasonic measurement allows thickness to be determined from one accessible surface only, which is particularly useful on pipelines, tanks, bulkheads, vessels and installed structures.
Why is it useful for corrosion inspection?
It allows remaining thickness to be checked even on painted or coated components and makes it possible to observe thickness variation. The min/max functions, difference and percentage-reduction values help identify and assess the most critical areas.
What are the minimum and maximum alarms used for?
They allow inspection thresholds to be set. When the measured value falls outside the established limits, the instrument indicates the condition through a change in waveform color, helping the operator immediately identify a point requiring further assessment.
Which data can be stored?
The instrument can store up to 100,000 thickness values and 1,000 waveforms. This capacity is useful for documenting inspections, comparing measurements over time and retaining graphical information related to the analysed points.
Are probes available for different applications?
Yes. A wide range of probes is available for smaller measurement points, lower thicknesses, high-temperature surfaces, through-coating measurements or wider thickness ranges. Probe selection must be assessed according to the component and required inspection.
Are cable and software included with the instrument?
Yes. Cable and software are included as standard and allow collected measurements to be managed, improving inspection traceability and reducing transcription errors.
Can a calibration report be requested?
Yes. A calibration report can be supplied upon request to document the instrument’s metrological state within company procedures for managing measuring equipment.
Fill out the form below to contact us.
"*" indicates required fields
