Application Notes
Guide to Rubber Thickness Gauges and Measurement
Rubber material and rubber coatings can be difficult to measure with conventional mechanical thickness measurement techniques. However, ultrasonic thickness gauging enables measurements on most points on the surface of rubber material—not just the edges—without having access to both sides. Ultrasound waves travel through the rubber/coating and reflect from the acoustic interface of the rubber and the substrate or other side. This acoustic interface can be air, steel, composite, or other materials as long as the once surface of the rubber is available for probe contact.
It is important to fully understand the application before taking thickness measurements. Rubber coating on certain materials may require special setups to maintain accurate thickness readings.
Ultrasonic Equipment Used for Rubber Thickness Measurements
Ultrasonic thickness measurements on rubber can be performed using precision thickness gauges for rubber, such as the 39DL PLUS™ gauge and the 45MG gauge with Single Element software. When combined with the appropriate transducers between 2.25 MHz and 20 MHz, these handheld gauges can typically measure rubber materials in the range from 0.008 in. (0.2 mm) to several inches depending on material This range will vary depending on the transducer and setup being used. Thick or attenuating rubber materials will require low frequency ultrasonic transducers the High Penetration software option for the 39DL PLUS and 45MG gauges.
The 72DL PLUS™ gauge offers a larger touch-screen display and a higher measurement update rate (up to 2 KHz). This gauge is available in a high-frequency version (up to 125 MHz) for measuring very thin rubber coatings. It can measure much thinner materials than conventional ultrasonic thickness gauges. The lower frequency version is also available thicker rubber measurements
Thickness Gauges for Rubber
Evident offers a range of thickness gauges well suited to rubber thickness measurement. These gauges can also be used to measure thickness of materials such as plastic, metal, and glass.
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39DL PLUS
The 39DL PLUS™ gauge is field-proven and reliable for virtually every ultrasonic thickness inspection. It works as a precision or corrosion thickness gauge to meet the challenges of demanding applications across industries, including maintenance, manufacturing, and energy production. With world-class ultrasonic capability, fast scanning speeds, and fully integrated wireless connectivity, this handheld gauge delivers results you can trust in a seamless workflow.
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72DL PLUS
The 72DL PLUS™ advanced ultrasonic thickness gauge delivers precision thickness measurements at high speed in a portable, easy-to-use device. Compatible with single element transducers up to 125 MHz, this innovative instrument is ideally suited to measure the thickness of ultra-thin materials, including multilayer paint, coatings, and plastic. It can simultaneously display the thickness of up to 6 layers.
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45MG
The handheld 45MG ultrasonic thickness gauge is packed with measurement features and software options. This unique instrument is compatible with the complete range of Evident dual element and single element transducers, making this gauge an all-in-one solution for virtually every thickness gauge application.
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Magna-Mike 8600
The Magna-Mike™ 8600 Hall-effect thickness gauge uses a magnetic probe to accurately measure the thickness of nonferrous and thin materials such as plastic bottles.