What are the Types of Thickness Gauges?

Thickness gauges are instruments used to measure the thickness of materials and objects. It is often used in industrial production to measure the thickness of products continuously or by sampling. Such instruments include radioactive thickness gauges that use the penetration characteristics of alpha rays, beta rays, and gamma rays, ultrasonic thickness gauges that use ultrasonic frequency changes, and eddy current thickness gauges that use eddy current principles, and mechanical contact measurement principles.

Laser thickness gauge

It uses the reflection principle of the laser to measure and observe the micro-geometry of the machined surface of the parts in mechanical manufacturing according to the light-section method to measure the thickness of the product. This is a non-contact dynamic measuring instrument. It can directly output digital signals to connect with industrial computers, process data quickly and output deviation values to various industrial equipment.

Ultrasonic Thickness Gauge

Ultrasonic thickness gauges measure thickness according to the principle of ultrasonic pulse reflection. When the ultrasonic pulse emitted by the probe passes through the object to be measured and reaches the interface of the material, the pulse is reflected back to the probe, which is determined by accurately measuring the propagation time of the ultrasonic wave in the material. The thickness of the material being measured. This principle can be used to measure all kinds of materials that can make ultrasonic waves propagate inside them at a constant speed. Ultrasonic thickness gauges are suitable for measuring the thickness of metals (such as steel, cast iron, aluminum, and copper), plastics, ceramics, glass, fiberglass and any other good conductor of ultrasonic waves.

Paper Thickness Gauge

It is suitable for measuring the thickness of various films, paper, cardboard and other sheet materials below 4mm.

Film Thickness Gauge

It is used to measure the thickness of films, sheets and other materials, with a wide measurement range and high measurement accuracy. The film thickness gauge can output data, set zero at any position, convert between metric and inch systems, and automatically power off.

Coating Thickness Gauge

Coating thickness gauges use electromagnetic induction to measure the thickness of coatings. The probe located on the surface of the component generates a closed magnetic circuit. With the change in the distance between the probe and the ferromagnetic material, the magnetic circuit will change to varying degrees, resulting in changes in the magnetoresistance and the inductance of the probe coil. Using this principle, the distance between the probe and the ferromagnetic material can be accurately measured, which is called the coating thickness. The coating thickness gauge can be applied to the thickness measurement of the electroplating layer, paint layer, enamel layer, aluminum tile, copper tile, babbitt tile, phosphating layer, and paper, and can also be used for the attachment of hull paint and underwater structural parts thickness measurement.

X-ray thickness gauge

When an X-ray penetrates the material to be measured, the change of X-ray intensity is related to the thickness of the material, so as to measure the thickness of the material, it is a non-contact dynamic measuring instrument. It takes PLC and industrial computers as the core to collect calculation data and outputs the target deviation value to the rolling mill thickness control system to achieve the required rolling thickness. The main application industries are strip and foil processing of non-ferrous metals and strip processing in the metallurgical industry.