What are the commonly used thickness measuring instruments?

Calipers, micrometers, coating thickness gauges, ultrasonic thickness gauges, what material are you going to measure the thickness of, I measure the paint coating on the steel, and I use the DR360 of Guangzhou Dongru to measure.

At present, there are three commonly used thickness gauges: laser thickness gauges, radiographic thickness gauges, and ultrasonic thickness gauges. A laser thickness gauge consists of two opposing laser distance sensors.

When working, the upper and lower sensors measure the distance between the sensor and the upper and lower surfaces of the measured object respectively, and the total distance between the two sensors can be subtracted from the distance measured by the two sensors to obtain the thickness of the measured object. The advantage of laser thickness gauges is that they are non-contact and do not lose accuracy due to wear, making them particularly suitable for measuring moving objects. It is also more accurate than ultrasonic thickness gauges and has no radiation contamination compared to X-ray thickness gauges.

X-ray thickness gauges use an X-ray source. Some of the X-rays entering the ionization chamber have a photoelectric effect and scatter with the walls of the ionization chamber and the gases filled in the ionization chamber. The secondary electrons cause the gas in the ionization chamber to produce positive and negative ions.

Under the action of the electrode voltage in the ionization chamber, it flows to the negative and positive electrodes, respectively. The anode and cathode collect currents in the order of 10-9A and 10-8A. It is converted into a voltage signal by an electrometer.

The task of the electronic circuit and the computer is to calculate the thickness value t based on the relationship between the output voltage u(t) of the electrometer in the probe and the thickness value t. Ultrasonic thickness gauges use the latest high-performance, low-power microprocessor technology. Based on the ultrasonic measurement principle, it is possible to measure the thickness of materials such as metals, as well as the sound velocity of materials.

Different occasions also use different thickness gauges, and it cannot be generalized. Typically, laser thickness gauges can be used for total thickness measurements, while X-ray thickness gauges and ultrasonic thickness gauges can be used to measure coating thickness. The appropriate thickness gauge should be selected according to the detection requirements of biotic production.

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

Thin film thickness gauge: used to determine the thickness of thin films, thin sheets and other materials, with a wide measurement range and high measurement accuracy.

Coating Thickness Gauge: Used to measure the thickness of the coating on ferrous and non-ferrous metal substrates.

Laser thickness gauge: It is a non-contact dynamic measuring instrument that uses the principle of laser reflection to measure and observe the microscopic geometry of the processing surface of parts in machinery manufacturing according to the light-cut dust shielding method.

X-ray thickness gauge: mainly used in non-ferrous metal strip and foil processing, metallurgical industry strip processing.

Ultrasonic thickness gauge: Ultrasonic thickness gauge is based on the principle of ultrasonic pulse reflection to measure thickness.

A thickness gauge is a device used to measure the thickness of a material or overlay, which can be divided into the following types according to different measurement principles and application scenarios:

Magnetic thickness gauge: suitable for the thickness measurement of non-magnetic permeability layer on magnetic permeable materials, the common Youheng imitation magnetic permeability materials are steel, iron, silver, nickel, etc., with high measurement accuracy.

Vortex Kailiu thickness gauge: It is suitable for measuring the thickness of non-conductive layers on conductive metals, such as coating or film thickness on metal materials such as aluminum and copper, but it is less accurate than magnetic thickness gauging.

Ultrasonic thickness gauge: Measure the thickness of the material according to the principle of ultrasonic pulse reflection, which is suitable for the measurement of the thickness of multi-layer coating layers, but it is relatively high.

X-ray thickness gauge: The thickness of the material is determined by the characteristics of the change in the intensity of the X-ray when the X-ray penetrates the material to be measured. It is often used for thickness control of metal materials in the rolling process, but the equipment ** is higher.

Coating thickness gauge: It is mainly used to measure the thickness of non-conductive coatings (such as paints, plastics, etc.).

Galvanized layer thickness gauge: It is mainly used to measure the thickness of the galvanized layer of good fibers on conductive materials (such as metals).

Depending on the application needs and material properties, it is necessary to select the appropriate thickness gauge for measurement to ensure the accuracy and reliability of the measurement results.

You can use the Goodscan 200B ultra-thin measuring and weighing machine, which can quickly and accurately measure the size of the goods, measure ultra-thin objects, and also weigh and measure the volume of goods.

You can use vernier caliper (I don't know what it's called in Chinese).

Initially, the widely used thickness measurement tools are calipers, spiral micrometers, thickness gauges, etc., but with the progress of science and technology and the development of society, the commonly used thickness measurement methods include radiographic thickness measurement, ultrasonic thickness measurement, optical thickness measurement, mechanical thickness measurement, etc., according to whether the measurement probe is in contact with the sample can be divided into two categories: contact thickness measurement method and non-contact thickness measurement method, the commonly used contact thickness measurement method is mechanical thickness measurement method, and other test methods mostly belong to non-contact thickness measurement method.

The most commonly used are, of course, vernier calipers and inner micrometers.

Hello, the tolerance of the inner hole is within 30 wires, you can use a pneumatic measuring instrument or a gas electric meter to measure, if it is greater than 30 wire tolerance, you can consider using an inductance meter to measure, simple, convenient, fast, I hope it can help you,