Ultrasonic Thickness Gauges

Ultrasonic Thickness Gauges – How to Choose the Right Model

Our ultrasonic wall thickness gauges offer non-destructive measurement from a single side and are used in applications ranging from corrosion inspection to thin-wall precision control. Choosing the right model depends on the material, coating, surface condition, and required functionality.

Measuring Range

Ultrasonic wall thickness gauges have a minimum and a maximum range. We can divide our gauges in three categories, precision gauges that start measuring at 0,15 mm and measure up to 25 mm with delay-line and higher with direct contact transducer. The TI-25 series start at 0,63 mm (some versions start at 1 mm) and, depending on the transducer and material, measure up to 900 mm. The larger range like the TI-M and CMX series start at 0,63 mm and can measure up to 30 m, depending on version, transducer and measured material.

Resolution

Most standard models like the TI-25 Series offer 0.01 mm resolution, which is sufficient for general-purpose inspections. The following models can measure at a higher resolution of 0,001 mm for more precision, TI-007X Series, TI-CMXDLP(C) and TI-PVX.

Measurement of Coated Materials

Ultrasonic gauges can measure the wall thickness under a coating without damaging the coating. To be able to measure through coating the gauge needs to be equipped with an Echo-Echo modus.
The TI-CMX Series is equipped with a CT modus which allows it to measure wall thickness and coating simultaneously or separate. It supports a second velocity for measuring coating.

Data Storage

When you need to record readings for later analysis, models with built-in memory such as the TI-007DLX, TI-25DLXT and most of the larger gauges are ideal. These can store thousands of measurements and are compatible with USB transfer for easy data export.

Advanced Features

For demanding applications, consider models with:

A-Scan / B-Scan: For visual waveform or cross-sectional analysis (e.g., TI-MVX, TI-CMXDLP)

Adjustable Gain & Sound Velocity: For difficult materials or better control (e.g., TI-007X, TI-MMX)

Colour display: For improved readability and analysis (e.g., TI-CMXDLP-C)

Speciality Models

Some gauges are designed for specific use cases beyond standard wall thickness applications:

• HPX-DLP: Designed for high penetration on challenging materials like castings, rubber, fiberglass, composites (FRP), and lead. Offers frequencies from 0.5 to 10 MHz and enhanced signal processing.
• PR-9: Compact sonic tester ideal for race shops and automotive use, with fast readings on steel, aluminum, and other metals. Especially suited for mapping chassis tubes and panels.
• PR-8V: Adds Echo-Echo and B-Scan modes to the PR-9 functionality, enabling precise inspection through coatings and better structural analysis.

Need advice? Our technical team will be happy to help you choose the most suitable ultrasonic thickness gauge based on your measurement needs and application type.