@glossmeter

Monitoring of UV lamp radiation intensity

2020-07-22T02:53:04.876Z

Measuring method of radiant intensity value of ultraviolet lamp tube
After turning on the ultraviolet lamp for 5 minutes, operate according to the instructions, and place the probe of the ultraviolet intensity tester (ultraviolet irradiator) with a measuring wavelength of 253.7 nm at the center of the vertical 1m under the ultraviolet lamp to be inspected. After the instrument is stable, the data shown is the ultraviolet lamp The radiation intensity value of the tube. The new tube radiation intensity value of the 30W straight tube ultraviolet lamp is ≥100μW/cm2, and the radiant intensity value in use is ≥70μW/cm2; the radiation intensity value of the new 30W high-intensity ultraviolet lamp is ≥200μW/cm2. UV dosimeter is used to test the uv intensity of the uvc germicidal lamp.

Strengthen the monitoring of UV lamp radiation intensity
The ultraviolet lamp in use should be tested for intensity with an ultraviolet illuminance meter in 3-6 months, and the lamp tube with unqualified intensity should be replaced in time. Use the ultraviolet radiation illuminance meter to make a measurement calibration once a year to maintain accuracy.

When monitoring, it must be in accordance with the measurement conditions in the "Disinfection Technical Specifications", the voltage is 220V, the temperature is above 20 degrees, the relative humidity is less than 60%, and the stable intensity after turning on the lamp for 5 minutes is the radiation intensity of the ultraviolet germicidal lamp. The ultraviolet radiation intensity can also be measured with a chemical indicator card. The indicator card is irradiated 1m away from the lamp tube for 1 minute, and the photosensitive coating changes from white to purple-red. Compared with the standard color block, the lamp radiation intensity can be known.

How to prevent new coronaviruses?

2020-07-14T02:29:22.811Z

I am afraid that the most important issue in recent days is how to prevent new coronaviruses. This article mainly brings you the time that the virus can survive the host and the ultraviolet disinfection method.
As an ordinary person, our knowledge of this virus is very limited, we can only listen to the recommendations of medical experts. Experts tell us that this virus causes a new type of pneumonia, and one way to prevent it is to wear a mask. Wearing a mask means that the new coronavirus can be spread through the air, and wearing a mask can effectively isolate the virus in the air. So, how long can the new coronavirus survive in the air? How to kill the virus in the air is related to the prevention effect. UV dosimeter is used to test the UV doso( UV irradiation intensity).
Viruses and bacteria are the enemy of our health, but viruses and bacteria are very different. The biggest difference is that bacteria have autonomous self-reproduction capabilities, but viruses do not. Once the virus leaves the host, it is easy to lose activity and eventually lose its harmfulness. That is to say, the virus needs a carrier to spread. Once it is separated from the original host, if it does not find a new host, it will lose its ability to infect within a certain period of time. Gao Fu, director of the Chinese Center for Disease Control and Prevention and an academician of the Chinese Academy of Sciences, believes that the new coronavirus is an enveloped virus and has poor adaptability to the in vitro environment and will die in less than 30 minutes. But this is also a speculation by experts, without scientific experiments and accurate data as support. Of course, this is the survival time of the new coronavirus in the air, and in actual life, the virus will not float in the air forever, most will still be attached to the surface of the object. So, how long can the surface attached to the object survive?
For this problem, there is currently no data specifically for the new coronavirus, because there is not enough time to conduct sufficient research. You can also refer to the survival time of similar viruses. Under normal circumstances, the same type of enveloped virus, such as SARS virus, can survive for a maximum of 6 hours in a dry state and a maximum of 24 hours in a humid state. They are all capsular structures, and it is estimated that the new coronaviruses are similar. Give the experts some time, I believe they will know soon.
At the same time, let me tell you some characteristics of the new coronavirus, which can also be said to be its weaknesses, which is more conducive to its prevention. The new coronavirus is afraid of high temperature, as long as the temperature reaches 56 degrees, it will lose its activity in 30 minutes, and there is no harm; secondly, the new coronavirus is afraid of disinfectants. In general, it can be killed with 75% medical alcohol Of course, 84 disinfectants and some chlorine-containing disinfectants are possible. In addition, the new coronavirus is afraid of ultraviolet rays, and it can also kill it after being irradiated with ultraviolet rays.

used car paint thickness detection

2020-07-09T02:54:26.913Z

The used car trading market is very large in my country, and the average number of vehicles traded daily is about 62,000. However, how to distinguish the quality of second-hand cars and how to identify whether the car is an accident has become a required course for many people who intend to purchase second-hand cars. Here is an example of used car trading, look at the value of coating thickness gauges in used car transactions.
Xiao Dong is a newly-married young man. Due to family and work needs, a car must be added to the home. Unfortunately, it costs more to buy a house and a wedding. Xiao Dong can spend less on buying a vehicle, which makes it target the purchase of second-hand cars. After being introduced by a friend, Xiao Dong came to a second-hand car dealership. After seeing several batches of vehicles one by one, he stopped his eyes on a brand car that starts with the letter B. Although the appearance of the vehicle is very clean and beautiful, and the interior is simple and elegant, the price of the used car is much lower than that of the same batch of vehicles. The second-hand car dealers at the side have always stated that there is no problem with the car. Xiao Dong, who is not familiar with used cars, has been hesitant. The next day, in order to find out whether the vehicle had a problem, Xiao Dong went to Linshang Technology and bought a coating thickness gauge to test. After testing, it is found that the thickness of the paint coating on the surface of the vehicle is partly greater than 400μm and partly less than 100μm. Since the thickness of the normal car paint is known to be between 90-180μm at Linshang Technology, the part of the imported car will be between 200-300μm In the meantime, if there is a car with extremely uneven distribution of car paint, the paint thickness on the surface of the vehicle will be different after the accident. After using the coating thickness tester to measure the paint on the surface of the vehicle, Xiao Dong's heart was put down, and he was able to buy an accident car because it was cheap.

How to test UVC LED light source intensity?

2020-07-06T03:23:45.919Z

As the performance of UVC LEDs (Deep Ultraviolet LEDs) improves, the use of this relatively new technology in disinfection, life sciences, and environmental monitoring instruments is rapidly developing. UVC LEDs can reduce space and power consumption, thereby increasing the cost of ownership for end users.The application of UVC LEDs in spectroscopy is increasing because they can solve the market trends in miniaturization, cost reduction and real-time measurement. UVC LEDs have a high utilization rate in some water sterilization, air sterilization, surface sterilization and biomedicine. UVC LED The waveband range is generally around 260nm, 275nm and 280nm.The main applications are as follows:UVC LED can be used as a sterilization light source in the above applications. For more effective sterilization, it is necessary to monitor the intensity of ultraviolet LED lights in real time. LS126C UV light meter is a professional instrument for measuring the intensity of UVC germicidal lamps, that is, the power of ultraviolet radiation energy per unit area. The UV radiometer is delivered with a 1-meter test hook in accordance with the 1-meter test requirements specified in the "WST 367-2012 Regulation of disinfection technique in healthcare settings" to ensure full compliance with the test standards. The LS126C UV radiometer also has a Bluetooth data transmission function. After connecting with the mobile phone APP, it can monitor the intensity of the germicidal lamp in real time from a certain distance to avoid UV burns during the test.

UV intensity meter measure the UVC irradiation intensity

2020-07-03T02:46:40.754Z

Short-wave UVC, the wavelength is between bai200 ~ 275nm, also known as short-wave sterilization ultraviolet. Du's ability to penetrate zhi is weak, and dao cannot penetrate most transparent glass and plastic. The short-wave ultraviolet rays contained in sunlight are almost completely absorbed by the ozone layer and absorbed by the ozone layer before reaching the ground.Reaction to human body: UVC in nature is absorbed by the ozone layer before it reaches the ground, and the effect on the skin can be ignored. However, short-wave ultraviolet rays are very harmful to the human body and cannot be directly irradiated. If it is directly irradiated, the skin can be burned in a short time, and long-term or high-intensity irradiation may cause skin cancer.Application field: UVC germicidal lamp emits UVC short-wave ultraviolet. Short-wave UV is widely used in hospitals, air-conditioning systems, disinfection cabinets, water treatment equipment, drinking fountains, sewage treatment plants, swimming pools, food and beverage processing and packaging equipment, food factories, cosmetics factories, dairy products factories, breweries, beverage factories, Bakery and cold room.In addition to UVC, there are UVA, UVB, and UVD.UVA band, wavelength 320~420nm, also known as long wave black spot effect ultraviolet.The UVB band, with a wavelength of 275-320nm, is also called medium-wave erythema effect ultraviolet.The UVD band, with a wavelength of 100 to 200 nm, is also called vacuum ultraviolet.Among the three wavelengths of UVB, the wavelength can only reach the epidermis of the skin, while the longer wavelength UVA will penetrate deep into the skin, damage the dermis layer of the skin, and cause skin aging.
LS126C UV intensity meter can be used to measure the UVC band irradiation intensity.LS126C UV intensity meter is a professional instrument for measuring the intensity of UVC germicidal lamps, that is, the power of ultraviolet radiation energy per unit area. The UV radiometer is delivered with a 1-meter test hook in accordance with the 1-meter test requirements specified in the "WST 367-2012 Regulation of disinfection technique in healthcare settings" to ensure full compliance with the test standards. The LS126C UV radiation meter also has a Bluetooth data transmission function. After connecting with the mobile phone APP, it can monitor the intensity of the germicidal lamp in real time from a certain distance to avoid UV burns during the test.

Dry film thickness gauge

2020-07-02T02:25:17.352Z

The steel structure fireproof coating has many superior performances that other anticorrosive coatings cannot match. The interference factors of the actual effect of the steel structure fireproof coating come from many aspects, the most important thing is the thickness of each part of the coating. We often use a coating thickness gauge to measure each layer, and strictly meet the required standards to improve the effectiveness of the steel structure fire protection coating as a whole.
1. Thickness of primerThe main function of the fire protection coating of the steel structure is fire protection, so the rust prevention work of the internal material also needs to be undertaken by the primer. When choosing an anti-corrosive primer, one needs to consider its compatibility with fire retardant coatings. The two should not only blend with each other, but also have strong adhesion.There are many types of anti-rust primers, but there are several common ones on the market and often used by the builders: alkyd zinc phosphate anti-rust primer, epoxy zinc phosphate anti-rust primer, epoxy zinc-rich primer Paint, inorganic silicon hydrochloride zinc primer. These are primer materials with good compatibility. According to the national standards, the constructor will control the thickness of the primer to about 60 microns. Dry film thickness gauge can be used to measure the dry film thickness2. The thickness of the intermediate paint meets the standardThe effect of the intermediate paint layer on the properties of the fire protection coating of the steel structure is effected in terms of thickness and stickiness. When preparing the intermediate paint of the fireproof coating of the steel structure, the builder needs to pay attention to whether the thickness of the intermediate paint is evenly applied. Waterborne epoxy cloud iron is a very common intermediate paint material, which can help to establish interconnections between different layers of fire retardant coatings.The builder must adhere to the basic construction process concept to ensure the permeability of the material and the stability of the rheological agent during the drying process. Usually used with a dry film thickness gauge, it can detect the thickness of the intermediate paint in time, and it is also conducive to the construction workers to make appropriate adjustments and changes.

UV lamp irradiation intensity measurement

2020-07-01T05:31:37.507Z

The UV lamp only has the effect of sterilization and disinfection when it reaches a certain intensity, so we must check and ensure that the intensity of the UV lamp can achieve the sterilization effect before using the UV lamp. The intensity of ultraviolet light is the main factor of ultraviolet sterilization effect. In the process of using the ultraviolet lamp, its irradiation intensity will gradually decrease. In order to ensure the disinfection effect of the ultraviolet lamp and prevent the occurrence of nosocomial infection more effectively, it is very necessary to regularly check the intensity of the ultraviolet lamp. The wavelength of the ultraviolet sterilization lamp is generally 253.7nm, and it is necessary to use a UVC ultraviolet irradiator to detect the ultraviolet light intensity of the sterilization lamp.
Linshang LS126C UV light meter is a kind of ultraviolet irradiance meter specially used for energy detection of ultraviolet germicidal lamp. The spectral response range is 230nm-280nm, and the peak wavelength is 254nm. The instrument is equipped with a 1-meter hook, which can be hung vertically under the lamp very conveniently. The instrument comes with Bluetooth function, which can be linked to the APP dedicated to mobile phones to realize wireless monitoring data at a certain distance. To avoid being burned by ultraviolet rays when viewing data on site, truly save the data automatically during unattended measurement. Bring convenience to your UV energy monitoring.

Finally, I hope you can use ultraviolet lamps for home disinfection correctly. During the disinfection process, try not to enter the room, so as not to cause harm to the human body.

Magnetic thickness gauge

2020-06-23T03:57:45.941Z

The structure of the magnetic thickness gauge is integrated, which can be operated with one hand during measurement. Because it is made using the principle of electromagnetic induction, it is suitable for measuring the thickness of non-magnetic coatings on various magnetic metal substrates. It can also measure the thickness of various coatings on steel (except nickel plating), coatings, enamel, plastics, etc. It can also be used to measure the thickness of various metal foils (such as copper foil, aluminum foil, gold foil, etc.) and non-metallic films (such as paper, etc.). Magnetic thickness gauges can be used in industries such as production, acceptance inspection, and quality supervision to test whether products comply with national standards.
The principle of ultrasonic pulse reflection is the main basis for the thickness measurement of the ultrasonic thickness gauge. When the ultrasonic wave emitted by the ultrasonic thickness gauge reaches the surface of the object, the pulse is returned when it meets the surface of the measured object, and the measured time can be measured. The thickness of the coating of the measured object, the ultrasonic thickness gauge is suitable for materials where sound waves can propagate at a uniform speed. The accuracy of the thickness gauge does not need to be tested by yourself. Just open the manual or find the specific name on the nameplate of the thickness gauge. Precision.In real life, the accuracy of ordinary thickness gauges is 0.1mm, 0.01mm, and 0.001mm. The third type is generally a thin-film thickness gauge, which requires higher accuracy. In addition, the accuracy of coating thickness gauges is generally 0.001mm. The accuracy of measuring thickness is less than 0.020mm, which is very poor. Some domestic thickness gauges have 4-5 standard sheets, and different thicknesses have Different standard films.

Glass VLT test

2020-06-22T03:58:02.979Z

Whether it is ordinary glass or ultra-white glass, the transmittance can be measured with a transmittance instrument. Like some manufacturers, the accuracy of the instrument is not enough. For ultra-white glass with a transmittance higher than 90%, the test is completely inaccurate. Linshang Company There is a high-precision light transmittance meter LS116 , which adopts a parallel light path design and conforms to the CIE visual function standard. The test data is accurate and the operation is simple and convenient. The first choice for light transmittance. It can also be used to detect the light transmittance of flat transparent materials, organic materials, coating materials, glass (hollow/interlayer), smoke density boxes, etc.
Linshang LS116 light transmission meter is a professional instrument for testing the light transmittance of uniform light-transmitting materials. It uses a parallel light path design and can also be used to detect large thickness materials with an accuracy of ± 1%. Function standard to ensure the passing of testing by the Metrology Institute.

Glossmeter principle

2020-06-22T03:10:31.440Z

(English: Gloss Meter), also known as gloss machine, light meter, light meter, gloss meter, gloss meter, gloss tester, gloss tester, glossmeter and smoothness tester are measuring objects Special instrument for surface gloss. Widely used in chemical raw materials, paint manufacturing, aerospace industry, automotive industry, shipbuilding industry, electronics industry, electrical appliance industry, IT communications and other supporting special measuring instruments. (Glossiness instrument unit No. 2 "GU"). The 213 gloss meter is a 213 switch to the mirror 213 mode in the portable gloss meter to make the instrument widely used.
The light source emits a beam of light that reaches the measured surface P through the lens L1. The measured surface reflects the light to the lens L2. The lens L2 converges the light beam to the photovoltaic cell located at the light barrier B. After the photovoltaic cell undergoes photoelectric conversion, the electrical signal is sent to The processing circuit performs processing, and then the instrument displays the measurement results. It should be noted that during the entire gloss measurement process, the light from the default light source is very stable and will not change.Glossiness is completely different from the concept of "smoothness" or "roughness" in the mechanical processing industry, which is an evaluation of the small unevenness of the material surface.The measurement principle of the gloss meter [1], the light source G emits a beam of light through the lens L1 to reach the measured surface P, the measured surface P reflects the light to the lens L2, the lens L2 converges the light beam to the photocell located at the light bar B, After the photoelectric conversion of the photocell, the electrical signal is sent to the processing circuit for processing, and then the instrument displays the measurement result. As for the unit of glossiness, according to JIS regulations, the unit of glossiness may be% or number. In addition, when recording, in principle, the manufacturer name and model of the measuring angle measuring instrument should be specified.