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Thickness Gauges

Thickness gauges are used for measuring the thickness of a material. Our thickness gauges use a non-destructive testing technique which does not permanently change the material it tests. GAOTek’s thickness gauges are reliable, high quality, and affordable instruments that provide an accurate measurement and offer an efficient and quick means of inspection or testing. They are compact, easy to carry and are designed to work in complex conditions. Our gauges are available for sale to the United States, Canada and globally.


The ever increasing use of automation, and continual advances in the production or manufacturing industries have raised demand for the use of gauging systems for improving material qualities such as strength, dimensional accuracy, flatness, surface and formability.

The innovation in measurement technology has enabled us to improve our products. GAOTek’s thickness gauges are designed and engineered for long-term use in various applications. GAOTek duly ensures compliance with industry standards.

The use of thickness gauges has become popular because of it is an ultrasonic non-destructive technique, a viable replacement for the destructive method of measuring the thickness of a material.

When a company fails to meet the coating quality of an incoming material, it ends up wasting a lot of money on rework. Thus, ensuring a coating or material thickness is in compliance with a manufacturer’s recommendations is highly important. Testing the thickness can reduce the number of iterations for rework, and potential customer returns due to finishing defects.

Today’s thickness gauges are simplified and advanced devices that are more sensitive than the thickness gauges of yesterday. Understanding the equipment available and how to utilize it to process control, item quality, and cost control, depending on the type of coating, thickness range, substrate material, and size and state of the part, operators can swing in any number of measuring procedures. Commonly used new advancements include magnetic measurement, ultrasonic coating thickness measurement and eddy current measurement.

Magnetic gauges – These are widely used to measure electroplating, nickel coatings, phosphating, paint, plastic and coatings such as enamel on steel. They are based on the principle of magnetic attraction principle and allow for a quick, precise, non-destructive measurement of non-magnetic coatings applied over ferrous substrates.

Eddy current gauges – They are usually used as a part of conductive coatings over non-ferrous metals, for example, anodize or paint over aluminum. This technique allows an accurate reading with even very thin materials through elimination of the base effect. There is also a scanning option that allows operators to continuously conduct measuring procedures over large areas with one swift measurement. The feature calculates an average measurement and gives a precise reading for thickness on uneven or finished materials. Its versatility offers the instrument the greatest adaptability for measuring an assortment of covering thicknesses.

Ultrasonic gauge – This was the first handheld instrument. It is designed to measure coating thickness ultrasonically. It works by utilizing a vibration that sent into the coating by a transducer. Then with a couplant, it is applied to the surface.

Many companies today use ultrasonic method in their quality programs as it is more time efficient. They avoid the use of destructive tests which require retests or reworks. Thickness gauges that use the ultrasonic principle also replace the destructive measurement techniques for concrete, wood, and plastic applications.

Regardless of the method used, operators must have knowledge of coating thickness testing when operating for the first time.


GAOTek’s thickness gauges are reliable, accurate, and easy to use devices. Their features include:

  • Portability – They are suitable for working in complex conditions.
  • Low battery indication
  • Simplicity and ease of operation
  • Backlight LCD for obtaining readings and measurements in dim light conditions.
  • Auto calibration
  • Wide range of applications with multiple methods of measuring the material.
  • Bluetooth™ data output choice.
  • “USB data output” and “RS-232 data output” to connect with PC
  • Automated material code and sound velocity value for convenient use
  • High performance and low power consumption microprocessor technology
  • Digital display
  • Automatic power off to conserve power
  • Exclusive micro-computer LSI circuit and crystal time, offering precise and accurate measurement and small measuring time
  • Wide measuring range and high resolution – With high power emission and broadband receiving sensitivity, the gauge can match probes of different frequencies. They are easy to use for measurements on rough surface.
  • Coupling status indicator.
  • Two work modes - Single point and Scan mode.
  • Two-point calibration function.

Thickness measurement is required in many industries such as oil, gas, aerospace, automotive, pharmaceutical, food processing, production and manufacturing, as part of quality control. Thickness gauges are generally utilized in various applications related to wood, composite, metals, fiberglass, ceramics, glass, concrete, plastics, foam products, paint and other non-metallic material.

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