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Paint thickness meter detection methods

lightmetre — Mon, 27 Jul 2020 03:00:27 GMT

The paint thickness meter uses a magnetic bai sensor to measure the non-ferromagnetic coating and plating layer on the base of ferromagnetic metals such as steel and iron. It is widely used in manufacturing, metal processing, chemical industry, commodity inspection, etc. field.
Paint thickness meter-principle method
Magnetic thickness measurement
It is suitable for measuring the thickness of the non-magnetic layer on the magnetic material. The magnetic material is generally: steel, silver and nickel. This method has high measurement accuracy.
Eddy current thickness measurement
It is suitable for measuring the thickness of non-conductive layer on conductive metal. This method has lower accuracy than magnetic thickness measurement.
Ultrasonic thickness measurement
Before measuring, remove any attachments on the surface, such as dust, grease, and corrosion products, but do not remove any covering material. Measurements should not be made at the sudden changes of the test piece, such as edges, holes and inner corners. It should not be measured on the curved surface of the test piece.

Usually, since each reading of the instrument is not exactly the same, it is necessary to take several readings in each measurement area. The local difference in the thickness of the covering layer also requires multiple measurements in any given area, especially when the surface is rough.

The thickness of the coating is measured by electromagnetic induction. The probe on the surface of the component produces a closed magnetic circuit. As the distance between the probe and the ferromagnetic material changes, the magnetic circuit will change to varying degrees, causing changes in the magnetoresistance and the inductance of the probe coil. Using this principle can accurately measure the distance between the probe and the ferromagnetic material, that is, the coating thickness.

UV dosimeter

lightmetre — Wed, 22 Jul 2020 02:24:35 GMT

Ultraviolet disinfection technology is used in various industries such as modern epidemic prevention, medicine, food disinfection, pure water treatment and photodynamics.
This is the use of specially designed high-efficiency, high-intensity and long-life UVC band ultraviolet rays to irradiate flowing water to directly kill various bacteria, viruses, parasites and other pathogens in the water to achieve the purpose of disinfection. The UVC ultraviolet radiation meter LS126C is dedicated to the measurement of the radiation intensity of ultraviolet sterilization.
UVC UV dosimeter
In the process of ultraviolet radiation sterilization, it is necessary to ensure the intensity of ultraviolet radiation. If it is unstable, the effect of sterilization will be greatly reduced. Can not play the role of real sterilization. Some people think that when the intensity of ultraviolet light is not enough, increasing the time of ultraviolet radiation can also achieve the effect of sterilization. This idea is unreasonable, just like boiling water, the disinfection effect cannot be achieved if the temperature does not reach 98 degrees.
In addition, the higher the intensity of ultraviolet radiation, the better the sterilization effect. Because ultraviolet rays come into contact with the human body. It will also have certain adverse effects on human skin and organs. Therefore, the intensity of ultraviolet radiation must be controlled and stabilized, considering that the radiation intensity of the ultraviolet germicidal lamp will be slightly weakened during use. Therefore, in order to achieve a good effect of ultraviolet sterilization and disinfection, it is necessary to always pay attention to the intensity of ultraviolet radiation, and it is necessary to frequently use UVC ultraviolet radiation meter for detection and confirmation.
UVC ultraviolet radiation meter LS126C is a necessary optical inspection instrument for ultraviolet intensity inspection. The detector is located on the front face of the instrument, which is easy to use and has high measurement accuracy. The probe is connected with the host by a high temperature wire, and the probe can be used in a high temperature environment. The probe comes with a magnet and a detachable handle, which facilitates the fixation and operation during the detection process.

What is UV aging test?

lightmetre — Tue, 21 Jul 2020 02:13:35 GMT

What is UV aging test?
　　UV aging test: using fluorescent ultraviolet lamp as the light source (with UVA and UVB lamp sources), by simulating the ultraviolet radiation and condensation in natural sunlight, the accelerated weather resistance test is performed on the material to obtain the weather resistance result of the material.
　　UV aging tester does not simulate full-spectrum sunlight, but it simulates the destructive effects of sunlight. This is achieved by controlling the main radiation of the fluorescent tube in the ultraviolet band of the solar spectrum. This method is effective because short-wave ultraviolet rays are the most important factor causing outdoor material aging. UV light intensity meter can be used to test the uv light intensity of uva and uvb bands.
　　UV aging test test standard: ASTM G 154-06
　　Using fluorescent ultraviolet lamps as the light source, using condensed moisture to simulate rain and dew, and by simulating the ultraviolet radiation in natural sunlight, the accelerated weather resistance test is carried out on the material to obtain the weather resistance result of the material. Including fading, discoloration, chalking, cracking, embrittlement, strength reduction and oxidation tests.
The aging test is a process of simulating various factors involved in the actual use conditions of the product to carry out corresponding conditions and strengthening experiments. The experiment is mainly for plastic materials. Common aging mainly includes light aging, damp heat aging, and hot air aging. When the product is used outdoors, it is often exposed to sunlight. If you want to know the life of the product when it can be used outdoors, you need to simulate the sun's ultraviolet light for UV aging experiments. Of course, the intensity of the experiment is much greater than the actual outdoor light intensity, thus shortening the test Time, you can understand the aging of the product after how many years of use through a short test. In the same way, if the product is used in a humid environment such as a bathroom with a high temperature, it will be subjected to damp heat aging. If the product is used in the heat dissipation position of the machine, it must be subjected to hot air aging.

UV energy meter principle

lightmetre — Thu, 07 May 2020 06:17:08 GMT

The Linshang UV energy meter uses an intelligent single-chip acquisition scheme. The measurement principle is to first convert the weak current signal of the ultraviolet detector into a digital signal through an ADC analog-to-digital conversion chip. Then, the single-chip computer collects the digital signal and adjusts it through software. To UV power, UV energy is obtained by integrating UV power with time. In this process, one needs analog-to-digital conversion to get the UV power, and the other needs integration to get the energy value. If high accuracy is required, the acquisition time must be fast enough, generally at least 1000 times per second, so that the integrated energy value is more accurate.

For the intelligent single chip acquisition scheme, the power value is first measured, and then the energy value is calculated. In this way, the UV energy meter adopting this scheme displays real-time power value, maximum power value and energy value at the same time. It also integrates temperature measurement.

The principle and price of UV energy meter

Linshang UV energy meter LS128 adopts high-speed multi-point acquisition, which can simultaneously test power, energy, temperature and time. It can record all the data of the acquisition process, and get the curve data in the process. It is convenient to analyze the UV intensity distribution and temperature distribution of various points in the curing furnace, as well as process analysis and process parameter formulation during the production process.

Light transmittance tester test aluminum plating film

lightmetre — Tue, 28 Apr 2020 02:15:51 GMT

Vacuum aluminum plating film is a green material that is widely used in the packaging industry. Due to the vacuum aluminum plating method, only one surface is covered on the cardboard surface.

The 0.25-0.3 micron (μm) thin, compact and bright aluminum layer is only one fifth of the aluminum foil layer of the composite cardboard.

Due to the different main performances of the vacuum coating products, the process requirements in the vacuum coating production process are also inconsistent. Optical thin films (similar to vacuum aluminum films, vacuum solar coating, etc.) vacuum coating products have optical performance requirements.

The Linshang light transmittance tester LS117 on the forest can be directly used to test the optical density value of the aluminum coating. That is to say, the aluminum coating can detect the coating quality of the vacuum aluminum coating equipment through the optical transmittance value.

Aluminum coating film transmittance test-transmittance tester

Detection method of light transmittance of aluminized film:

1. Short press the "Start" button to enter the test interface

2. When there is no sample, the light source probe and the receiving probe are tight, when the T (transmittance) on the interface is displayed as 100.00%, start the measurement

3. Pull up the receiving probe, put it in the aluminum coating, and then close it tightly. The current T value is the light transmittance value of the tested sample, and the OD value is the optical density value of the tested sample.

The LS117 light transmittance tester is an instrument made using the principle of diffuse transmission and has an integrating sphere effect. It is suitable for detecting the light transmittance of various diffuse transmission materials such as milky white, foggy, frosted matte, etc .; the optical density of X-ray film, film and other materials.

Gloss tester test optical parts

lightmetre — Mon, 27 Apr 2020 02:50:50 GMT

The performance inspection of the surface of optical parts is very important. For example, the defects such as scratches and scribing on the surface of optical parts will cause the gloss of the product to decrease and affect its performance. As the surface characteristics of optical parts, gloss can present different bright spots on the surface of the material or overlap the surface image, which can be measured by glossiness. Can be tested with a gloss tester.

The glossiness varies according to the angle of the incident light, and the measured numerical results also deviate. The common gloss tester mainly has three measuring angles of 20 °, 60 ° and 85 °. When the incident angle increases, the gloss value of any surface also increases, so when measuring the specular gloss, the incident light angle must be determined. 60 ° is a universal measuring angle.

Optical parts surface gloss test-gloss tester

Gloss tester LS191 measuring optical parts using steps:

1. Select the optical parts sample, the surface should be clean and tidy, the area should not be too large or too small, it must be able to completely cover the measurement caliber of LS191.

2. Wipe the surface of the test specimen clean with lens paper or a lint-free cloth, and test the gloss of the optical parts specimen according to the operating instructions of LS191.

3. Take multiple points on the surface of the optical part for measurement and evaluate the glossiness of the surface of the optical part by viewing the average value.

The gloss tester LS191 has an intelligent statistical function, which can count the maximum, minimum, average and standard deviation of the test when in use. The smaller the difference, the more uniform the surface gloss of the material.

LS191 gloss tester is a high-precision glossiness measuring instrument independently developed by Linshang Technology. It has independent intellectual property rights and complies with Chinese national standard GB / T9754. The instrument adopts a universal angle of 60 degrees, which meets the requirements of the first -class working machine in the JJG696 standard.

Plating thickness meter manufacturer in China

lightmetre — Sun, 26 Apr 2020 01:26:47 GMT

The LS220 plating thickness meter produced by Linshang, a plating thickness meter manufacturer, is professionally used to detect the thickness of second-hand car paint films. When detecting the thickness of the paint film of a used car, the instrument is turned on and the probe is pressed vertically on the surface of the car to obtain the thickness of the paint film. The test can be repeated at the same location, and the average value is the thickness of the paint film. If the detected car paint thickness is higher than 400μm, it can be determined that the car has been scratched or a serious car accident, and it is still repaired. This car should be purchased carefully. Because it is likely that there are problems with the internal parts of the car, this car is likely to have an accident during driving. Whether it is for the quality of the car or for our personal personal safety, when buying a second-hand car, it is recommended to use the coating thickness gauge of the coating thickness gauge manufacturer Lin Shang Technology to detect whether the vehicle has experienced a car accident.

Plating thickness meter manufacturer Linshang instruments measure the thickness of car paint

LS220 product parameters of Linshang, a plating thickness meter manufacturer:

Measuring principle: Fe: Hall effect / NFe: eddy current effect

Probe type: built-in integrated

Measuring range: 0.0-2000μm

Resolution: 0.1μm: (0μm-99.9μm)

1μm: (100μm-999μm)

0.01mm: (1.00mm-2.00mm)

Unit: μm / mil

Measurement accuracy: ≤ ± (3% reading + 2μm)

Measurement interval: 0.5S

Minimum measurement area: Ø = 25mm

Minimum radius of curvature: convex: 5mm / concave: 25mm

Minimum substrate thickness: Fe: 0.2mm / NFe: 0.05mm