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UV germicidal lamp selection

First, select category

There are low-pressure mercury lamps on the market, as well as LED UV lamps and high-pressure xenon lamps.

Low-pressure mercury lamps are currently the mainstream product with a life span of 8000 hours. The dominant wavelength is 253.7nm, which has low sterilization efficiency. We use EIT energy meters to measure the radiation power of most mercury lamps in the market. The power of low-pressure mercury lamps is very low in microwatts. Calculation. However, due to the low light power, the sterilization efficiency is lower, and long-term irradiation is required. It is equivalent to sunlight in summer and has no obvious effect on sterilization. And the mercury lamp will produce a lot of ozone, pollute the environment. It is a good choice for seeking psychological comfort. UVC irradiance meter is used to test the uv irradiation intensity of the uvc led light sources.

UVC LED has a long life and high sterilization efficiency at present. It can reach 99.99% sterilization rate in 3 minutes, high power; the wavelength is between 265nm and 280nm. But the price is more expensive. LED UVC has the best prospects, but it is currently suitable for disinfection in small spaces. Due to the high price in other scenarios, it is possible to choose to purchase.

Ultraviolet high-pressure xenon lamp, high power, stroboscopic life of 8000-10000 times (8000 times in the United States, 10000 times in Germany), 1 minute sterilization efficiency of 99.99%, can kill bacteria such as Escherichia coli and spores on the surface of the object, expensive, It is more suitable for medical institutions, large shopping malls, airports, airplanes, train cars, etc. Suitable for procurement by government medical institutions. Generally speaking, LED UVC has the best prospects and the price is slightly higher. But the bactericidal effect is significant. More suitable for purchase.

Second, choose materials

Most of the market uses quartz tube and high boron glass.

Quartz tube ultraviolet germicidal lamp:

1. The material with the highest ultraviolet transmittance can transmit more than 90% of 253.7nm ultraviolet rays;

2. High ultraviolet intensity, long life, low light decay, good sterilization effect, lamp life is generally greater than 8000 hours.

High boron tube ultraviolet germicidal lamp:

1. High boron glass can only transmit about 50% of 253.7nm ultraviolet light;

2. Its ultraviolet radiation intensity is small and its life span is short. Several established international companies are doing well, such as Philips/OSRAM. Blue Spectrum Technology uses quartz glass with high light transmission.

Third, choose whether to contain ozone

Quartz UV lamps are divided into ozone and ozone-free.

Need to make a choice for specific use scenarios. Such as disinfection box or warehouse goods disinfection, need to use ozone. (Note: Since ozone is harmful to cultural relics/calligraphy, etc., you need to consult a professional before use.)

Doped (Ti, Ce) quartz glass for ozone-free ultraviolet lamps;

Natural quartz glass, used for ozone ultraviolet lamps;

Synthetic quartz glass has a higher cost and is used for ultraviolet lamps with higher requirements. General household.

#UVC irradiance meter

Mil thickness tester test car paint thickness

Based on the above basic thickness standards, we can refer to the actual thickness of the second-hand car paint film purchased. Take the BYD brand cars that are common in the used car market as an example. The thickness of its original paint surface should be more than 200um. The thickness of some BYD vehicles that are painted twice will be thinner than the original paint. Degree is also low. When we actually purchase, we often use paint coating thickness gauges to test a few, and we will find that there are obvious differences in the thickness of their car paint. It is this difference in the thickness of the paint film on the surface of the car that the buyer of the second-hand car can communicate with the car owner repeatedly to determine whether the car has had a major accident. In addition, the correct and reasonable use of mil thickness tester for testing can help people find the paint film peeling off efficiently. What needs to be pointed out is that in the field of automotive spraying, professionals do not blindly spray the same thickness of paint film, but spray the corresponding thickness of paint according to different parts of the car surface, roof, rearview mirror, rear, and body. According to this feature, second-hand car buyers can purposefully select five points in the middle, front, rear, left and right of the vehicle as sample points when measuring with a paint coating thickness gauge. The results are averaged. This detection method is very objective and has guiding significance in the practice of car selection. The car paint film thickness detected by the LS220B paint coating thickness gauge of Linshang Technology Enterprise can be used as a criterion for people to judge. Its temperature compensation function can maintain a certain stability under low temperature conditions for normal use. This LS220B paint coating thickness gauge also has a Bluetooth connection function, which saves a lot of time for statistical data in this information age.

#mil thickness tester

car paint meter

The car paint meter also has a detection range, and the detection of the uneven position of the paint surface is inaccurate The paint film meter is an instrument after all, so it has a detection range. After the detection range is exceeded, the paint film meter is also powerless. For example, the surface of the car paint, especially the positions of the A, B, and C pillars, are increased due to chamfering, after repairing the paint surface If the thickness of the paint film meter increases too much, the paint film meter will explode. Although the paint film meter explosion meter indicates that the A, B, and C pillars of the car have been repaired, the degree of repair or the severity of the accident How big is the measurement value of the paint film meter is far from enough. Need to further check the actual extent of damage to the A, B, and C columns. So how to check the A, B, and C pillars of the vehicle? It's actually very simple, just peel off the sealing strip to know. After peeling off, observe whether the solder joints of each column disappear, whether there are scratches on the door frame, etc. The results you see may be more unacceptable than the value of the paint film meter. Summary: The paint film meter is a commonly used instrument in the evaluation of used cars. The measured value of the paint film meter can explain certain maintenance facts of the vehicle, but the paint film meter also has certain limitations, so you should pay more attention when buying a used car , Check the parts that may have problems. For example, bumper bolts, car headlight lamp group appearance time and so on. This way you won't worry about being deceived.

#car paint meter

How to choose UV lamp?

How to choose ultraviolet disinfection lamps ? Currently on the market still use mature low-pressure mercury lamp sources. Low-pressure mercury lamps mainly have two glass materials-quartz glass and high boron glass. Just to say, the ultraviolet transmittance and radiation intensity of high boron glass are lower than those of quartz glass. When buying domestic brand ultraviolet germicidal lamps (tubes), you must choose quartz glass tubes.

As I mentioned above, UVC is weak in penetration and cannot penetrate ordinary glass. General consumers can’t distinguish the difference between quartz glass, high boron glass and ordinary glass, so when you buy ultraviolet disinfection and germicidal lamps (tubes), don’t greedy cheap and choose miscellaneous goods. When you buy it back, you think it can be lit and illuminated. Sterilization may actually have no effect at all, and the silver was wasted. The market is mixed, and the price difference between quartz glass tubes and ordinary glass tubes is quite large, causing many profitable manufacturers to produce inferior products (with many boasting features) to deceive consumers. Be sure to choose big-name regular manufacturers such as: Philips, Panasonic, Osram, Guangmingyuan, Shelley, etc. The following are some of the more common types of UV germicidal lamps that are portable and mobile. This is the first choice for home use. Most of them have timing/remote control/infrared induction functions, which are safe and convenient. Of course, you still need to pay attention to safety protection when using it, and read the instructions carefully. During the SARS period, many people rushed to buy ultraviolet germicidal lamps, but they were injured because of improper operation. The low-power type is also mentioned above. UVC meter is designed to test the uvc light source irradiation intensity. Users who want to sterilize their own glasses/mobile phones/clothes and other small objects should not be taken advantage of to buy the five or six hundred flashy LED ultraviolet disinfection boxes. It is better to buy this ordinary one. More than 100 pieces of UV shoe sterilizers are used as substitutes, and the effect is better. Although the original positioning of this thing is to deodorize and dry the shoes of people with athlete's foot and sweaty feet, we can also take a cardboard box and put small objects in for sterilization. The integrated bracket type is used in places with frequent pollution and strict requirements on the purification environment, such as hospitals/food processing plants/school canteens and other places. Generally fixed on the wall or hung on the ceiling, ready to use. It can also be used at home, but it is generally not recommended because it is inconvenient, although the sterilization effect of the hoisted type is better than that of the portable type.

#UVC meter

UV light application and sterilization principle

UV dose plays a vital role in the sterilization process. Under the condition of sufficient ultraviolet dose, the inactivated virus and bacteria will not resurrect, but when the dose is insufficient, many viruses and bacteria that are inactivated by ultraviolet radiation can repair their damaged structures through the assisting effect of light. UV radiometer is used to test the uv intensity of the light sources.

Ultraviolet light application and sterilization principle

According to the wavelength, ultraviolet (Ultra Violet, UV) light is usually divided into UVA (315nm-400nm), UVB (280nm-315nm), UVC (200nm-280nm). Among them, the wavelength UVC band is also called the "solar blind" band. Due to the strong absorption of ozone in the atmosphere, there is almost no ultraviolet light in this band in the near-Earth solar spectrum. The main applications of UVC mainly include water/air/surface disinfection/purification, analytical instruments (spectrophotometry, liquid chromatography, gas chromatography, etc.), and mineral analysis. The UVC band has short wavelength and high energy. It destroys the molecular structure of microorganisms (bacteria, viruses and other pathogens) in a short time. By destroying the DNA and RNA of microorganisms to prevent their reproduction, it can achieve high-efficiency and rapid broad-spectrum bactericidal effects, thereby preventing water , The air and the surface of the object are sterilized, so that the cells cannot be regenerated, so it is widely used in the sterilization and disinfection of water and air. The data shows that with only 30mW/cm2 of UVC ultraviolet radiation intensity, almost 100% of most bacteria can be killed in one second, the effect is very significant, and it can be widely used in the medical and health fields. In the field of personal health and household hygiene, ultraviolet light can be used for disinfection of water cups and chopsticks, air purification and sterilization, killing worms, sterilization and deodorization of footwear and socks, and sterilization of baby bottles.

UV germicidal effect

Depending on the type of microorganism, the UV sterilization time and dosage are also different. Different bacterial species have different absorption peaks of ultraviolet light. For example, the maximum absorption wavelengths of DNA and E. coli are both 265nm, while the maximum absorption wavelengths of Cryptosporidium and bacteriophages are 261nm and 271nm, respectively. Therefore, the required sterilization time should also be different. When the ultraviolet radiation intensity is 3×104μW/cm2, the time required to kill viruses and bacteria, mold spores, and algae bacteria are 0.1～1.0s, 1.0～8.0s, and 5.0～40.0s respectively. According to the research team of Dong Xiaoping, an expert from the Institute of Viral Disease Control and Prevention of the Chinese Center for Disease Control and Prevention, discovered that the SARS virus can be killed by UVC irradiation with an intensity greater than 90 μW/cm2 in 30 minutes. UV dose plays a vital role in the sterilization process. Ultraviolet dose can be expressed as the product of ultraviolet intensity and exposure time. Under the condition of sufficient ultraviolet dose, the inactivated virus and bacteria will not resurrect, but when the dose is insufficient, many viruses and bacteria that are inactivated by ultraviolet radiation can repair their damaged structures through the assisting effect of light. When the UV dose is the same, high-intensity, short-time or low-intensity, long-term irradiation can be used to achieve the purpose of sterilization. To kill 1×104 Helicobacter/mL, the UV dose is about 30 mJ/cm2, and to kill the same number of spores, the UV dose is about 70 mJ/cm2.

#UV radiometer

Coating thickness measurement

The thickness measurement methods of coating thickness meter include: 1. Magnetic thickness measurement method. It is suitable for measuring the thickness of non-magnetic layer on magnetically conductive materials. Magnetic materials are generally: steel\iron\silver\nickel. This method has high measurement accuracy. 2. Eddy current thickness measurement method. It is suitable for measuring the thickness of non-conductive layer on conductive metal. This method has lower accuracy than magnetic thickness measurement. 3. Ultrasonic thickness measurement method. This method has not been used to measure the coating thickness in China. Some foreign manufacturers have such instruments, which are suitable for multi-layer coating thickness measurement or occasions where neither of the above two methods can be measured. But generally the price is expensive and the measurement accuracy is also not tall. 4. Electrolytic thickness measurement method. This method is different from the above three, it is not a non-destructive test, it needs to destroy the coating, and the general accuracy is not high, and the measurement is more troublesome than the other several. 5. Radiation thickness measurement method. This kind of instrument is very expensive (usually more than 100,000 RMB) and is suitable for some special occasions. LS221 paint thickness gauge is also called coating thickness meter and paint thickness meter. It is a professional instrument for measuring the thickness of metal surface coatings. The host and the probe adopt a separate design, which is convenient for viewing data while testing under complex test conditions. It can be used in the laboratory and engineering field.

#coating thickness gauge #paint thickness gauge

UVB light meter detects the radiation intensity of the reptile lamp

UVB light meter detects the radiation intensity of the reptile lamp: The reptile lamp may be a quite lamp that simulates the supplement of sunlight and uses the decomposition of vitamin D3 within the body of reptiles (such as lizards, turtles, etc.) to market calcium absorption. the most function of this type of lamp is to stop pets from affected by rickets (commonly referred to as rickets) and die during the breeding process. Reptile lights are more and more widely utilized in our lives, especially for those that love pets. The UV intensity of the reptile lamp must be controlled at a hard and fast value. Because the UV intensity is just too large, the temperature within the cage is just too high, which isn't conducive to the health of reptiles. The UV intensity is just too small to realize the aim of calcium supplementation. Therefore, UVB ultraviolet meter is usually wont to determine the ultraviolet intensity of the reptile lamp. UVB light meter UVB light meter detects the radiation intensity of the hospital disease of the skin treatment lamp: There is no such thing as a reptile lamp in medicine. UVB lamps in hospitals generally use narrow-band mid-wave ultraviolet rays with a wavelength of 313nm to treat skin diseases. for instance , psoriasis, psoriasis, atopic eczema , vitiligo, pityriasis , eczema, alopecia , etc. Because UVB lamps are wont to treat skin diseases, the intensity of ultraviolet of UVB lamps is extremely strict. Too low intensity won't achieve the aim of treatment, and too high intensity will burn the skin. For the radiation intensity detection of hospital dermatology treatment lamps, we generally choose Linshang UVB ultraviolet meter, that is, LS125 uvb light meter host + UVB probe. Linshang uvb light meter adopts the planning of main unit and probe split type, which is convenient for viewing real-time data during the test. The instrument is suitable for UVB light measurement of 297nm, 308nm, 313nm and other wavelengths. During testing, the instrument can intelligently count the utmost power, minimum power, real-time power value, energy value and measurement duration of the test, which is convenient for analyzing the steadiness of the lamp power.

#uvb light meter

Used car paint thickness detection

If a second-hand car is within the case of an accident, there must be traces of sheet or paint repair on the body paint, and therefore the scope of repair are going to be relatively large. Therefore, as long because the detection of second-hand accident vehicles is involved, it's necessary to try to to paint inspection items to reveal the history of huge and little accidents that have occurred within the vehicle, and to work out whether the vehicle is an accident vehicle. It are often said that if you understand the paint finish of the vehicle, you'll roughly understand the history of the car and therefore the accident. Of course, if you would like to completely and accurately determine whether the vehicle may be a technically recognized accident vehicle, you continue to need knowledgeable second-hand car appraisal appraiser to pass professional equipment, and take the great inspection results of the chassis, front and rear anti-collision beams, and structure as quasi. If it's only to detect the paint surface of the car body, you'll use the second-hand car identification artifact-"paint thickness meter" to uncover the historical veil of auto sheet painting As the name implies, the paint thickness meter is an instrument that detects the worth of the paint surface of the car body. It determines whether there are traces of sheet or paint by testing the thickness of the paint surface and therefore the iron skin of the body. within the inspection, the car roof is usually used because the benchmark. If the worth of other parts is significantly above the benchmark value, the a part of the vehicle are often judged to possess undergone sheet and paint trimming. within the process of second-hand car identification, if the inspector finds that the difference between the worth and therefore the reference value is extremely large, the vehicle are going to be further inspected to ascertain if there's any trace of an accident there and determine whether it's an accident car. Tips: The paint surface of the new car is sprayed by computer automation, and it's administered as an entire during a very clean dust-free workshop, therefore the thickness between the paint surface and therefore the car body metal are going to be very uniform, and there'll be no large difference. The paint sprayed manually after the vehicle is partially damaged is really impossible to realize an equivalent thickness because the original paint. additionally , if there's repair of sheet , putty glue is applied between the paint surface and therefore the metal, and therefore the refore the thickness between the paint surface and the metal are going to be greater. Generally, the thickness of most cars is between 80-140, and alittle number of imported cars may reach quite 150. If you test the left door of the car, you'll test the five points on the highest , bottom, left, right and middle of the door. the worth you would like to feature and divide by 5 is that the average value. If the worth of some extent is bigger than the typical value by quite 30um, it's judged that the car could also be repaired. Of course, if the door is totally replaced, it must be inspected from internal screws and other joint parts. Please concentrate to related articles for testing during this area.

#paint thickness meter

UV radiometer used in UV curing industry

1. What is UV curing coating? 　　 As the name implies, paint is a material that can be coated on the surface of the object to be coated and can form a firmly adhered coating film. UV coatings are UV-curable coatings, which are different from PU, PE and other naming methods. UV coatings are not named after film-forming substances but by curing methods. UV-curable coatings need to be used with ultraviolet rays and UV energy meters. UV curing coating UV coating refers to a resin coating cured by ultraviolet radiation (Ultraviolet curing coating). It is a resin coating that uses ultraviolet light as a curing energy to quickly glue and form a film at room temperature. It is generally divided into two categories according to the type of initiator: Free radical UV coatings, cationic UV coatings, what we are now involved mainly refers to free radical polymerization UV coatings. The UV energy meter is used to measure whether the UV light source is attenuated. UV radiometer is used to test the UV energy of the light source. 　　 2. Advantages of UV curing coatings 　　 1. Fast curing speed It is suitable for large-scale assembly line operations. The curing speed is fast. Generally, it can be cured in a few seconds. Compared with the traditional thermal curing process that takes several hours or even days to cure, it greatly improves the production efficiency and saves the storage space of semi-finished products. Meets the requirements of automated production. There are many factors that affect curing, which breeds many equipment around the UV curing industry. The intensity of the light source is particularly important. The UV light source will decay after being used for a period of time. At this time, a UV energy meter should be used to determine whether the light source is still effective. If the light source decays, the curing machine will run with half the effort. 　　 2. Energy saving and high efficiency UV curing has low energy consumption and high energy utilization. Compared with thermal curing coatings, the energy consumption is about one-fifth. At the same time, the solid content of UV coatings is high, which greatly reduces the actual consumption of materials; in addition, the investment in UV curing equipment is relatively Low, and the plant occupies less land. 　　3. Green environmental protection 　　UV coating basically does not contain volatile organic compounds, almost 100% cured into a film, is a green environmental protection coating, environmentally friendly, and the construction site is not prone to fire or explosion accidents.

#UV radiometer

UV power pucks

Ultraviolet rays include UVA band (320nm-380nm), UVB band (280nm-320nm) and UVC band (200nm-280nm). Different bands of ultraviolet rays are widely used in sterilization, curing and many other industries. The intensity and energy monitoring of ultraviolet rays have also become the industry According to the standard, Linshang's ultraviolet meters are mainly divided into UV power pucks and UV light meters. 1. According to the different classifications of the application industry and measuring band of ultraviolet instruments: Selection table of UV energy detector 2. Classification according to the main measurement objects and probe forms of ultraviolet instruments: Linshang UV Irradiance Meter 3. Common problems of UV energy meter selection: 1. The main difference between high pressure mercury lamp and UV LED light source? Answer: A. UV LED is more energy efficient. Because of the relationship of the spectrum, most of the spectrum emitted by the high-pressure mercury lamp is not wasted for curing purposes, and the heat is very high and the temperature is high. B. UV LED has a single spectrum and has multiple wavelengths to choose from. 2. What is the function of the UV energy meter? Answer: A. In the curing industry, the amount of UV energy in the curing process is a very important process parameter. B. In energy measurement, stability and consistency are more important than accuracy. Of course, the stability and consistency of the UV energy meter are not well done, and the accuracy is impossible to talk about. C. UV light sources will decay over time. The UV energy meter is used to measure the attenuation degree of UV light sources to ensure the consistency of process parameters in the production process. 3. Why are UV energy meters divided into two types: high-pressure mercury lamp and UV LED light source? Answer: A. The ultraviolet spectrum emitted by the high-pressure mercury lamp and the UV LED light source is very different, that is, the wavelength and distribution range of the emitted ultraviolet are very different. The high-pressure mercury lamp is a wide-spectrum light source, and the emitted spectrum also includes visible light and infrared light. . UV LED light source emits a narrow spectrum. B. Ultraviolet instruments have specific requirements for the measured wavelength range. The ultraviolet energy meter, which claims to be able to simultaneously measure high-pressure mercury lamps and UV LED light sources, is definitely a non-professional product. C. LS120 ultraviolet energy meter is suitable for measuring high-pressure mercury lamp light source. D. The UV energy meter for LS128 exposure machine is suitable for measuring UV LED light source, and UV LEDs of various wavelengths can be measured. 4. The relationship between energy and power? Answer: Energy is equivalent to distance and power is equivalent to driving speed. When driving at a constant speed, distance = speed × time. When the driving speed is fast and slow, if the equation "distance = speed × time" is to be established, the speed is neither the highest speed nor the lowest speed, nor the speed at a certain moment, but must be the average speed in the whole process. Similarly, energy = power × time. Since the UV intensity at different points in the curing oven is different during the UV curing process, the above equation is only valid when the power is an average power. Some customers asked why energy is not equal to the maximum power multiplied by time, which is the reason mentioned above. 5. Does the Linshang UV Energy Meter have data deviations from similar foreign instruments? Answer: Yes. A. There are differences in the standards of different countries, and the UV standards have not been unified globally. B. Famous foreign instruments such as EIT ultraviolet energy meter, oxtail ultraviolet energy meter, ORC ultraviolet energy meter, etc., the measurement data of these instruments also have large deviations, so our instruments and various foreign famous instruments will also have deviations . C. Ultraviolet energy meter is very sensitive to the test band range, a little deviation of the band may cause deviation of the measurement data. D. The consistency and stability of the data of our UV energy meter are recognized by customers. E. The forest UV energy meter complies with China's national standards and can get the national measurement certificate. 6. LS125+UVA ultraviolet radiation illuminance meter and LS120 ultraviolet energy meter are used for high-pressure mercury lamp measurement. What is the difference? Answer: A. LS125+UVA ultraviolet energy meter host and probe form. B. LS120 ultraviolet energy meter probe is integrated, can measure intensity, energy, temperature, time at the same time, display intensity graph, temperature graph, and can be connected to a computer to print test reports. It is the most complete measurement function for high-pressure mercury light sources. paragraph. 7. LS125+UVALED ultraviolet radiation illuminance meter and LS128 ultraviolet energy meter both measure for ultraviolet curing UV LED light source. What is the difference? Answer: A. LS125+UVALED ultraviolet illuminance meter host plus probe type, intensity and energy measurement. B. LS128 ultraviolet energy meter probe is integrated, can measure intensity, energy, temperature, time at the same time, display intensity graph, temperature graph, and can connect to computer to print test report, (it is the world's only professional UV LED light source for testing UV energy meter).

#UV power pucks

Ultraviolet rays classification

Ultraviolet rays can be divided into four regions according to different wavelengths. Short-wave ultraviolet light is referred to as UVC, with a wavelength of 200-280nm, medium-wave ultraviolet light is referred to as UVB, with a wavelength of 280-320nm, long-wave ultraviolet light is referred to as UVA, with a wavelength of 320-400nm, and UVD with a wavelength of 100-200nm. It is called vacuum ultraviolet. UVA band: The wavelength is between 320-400nm, also known as long-wave black spot effect ultraviolet rays. The ultraviolet rays in this band have strong penetrating power and can penetrate most transparent glass and plastics. UVA can directly reach the dermis of the skin, destroy elastic fibers and collagen fibers, and tan our skin. UVA ultraviolet rays with a wavelength of 360nm conform to the phototaxis response curve of insects, and can be used to make insect trap lamps. UVA ultraviolet rays with a wavelength of 300-420nm can pass through a special colored glass tube that completely cuts off visible light, and only emit near-ultraviolet light centered at 365nm, which can be used for ore identification, stage decoration, currency verification and other places. UVB band: The wavelength is 275-320nm, also known as medium-wave erythema effect ultraviolet light, medium penetration, its shorter wavelength part will be absorbed by transparent glass, and most of the medium-wave ultraviolet light contained in sunlight is absorbed by the ozone layer , Only less than 2% can reach the surface of the earth, which is particularly strong in summer and afternoon. The ultraviolet health care lamp and the plant growth lamp are made of special transparent purple glass (not transmitting light below 254nm) and phosphor with a peak near 300nm. If you want to test the intensity of UVA and UVB bands, UVA light intensity meter or UVB light intensity meter can be used

#UV light intensity meter #UV light meter

UV energy meter used in curing industry

UV energy meter can be said to be an indispensable artifact in the UV curing industry. It can help monitor the speed and quality of the UV curing process, and better enhance the product's competitiveness among similar products.

1. Basic knowledge of pigment color curing Our modern paper printing technology is developing very rapidly, and people are no longer limited to the traditional "white paper and black characters". Pigment color curing technology is an emerging process. Because the color of a pigment is closely related to its curing speed, we often choose UV energy light sources according to different hues. 2. The basic concept of UV curing UV curing means that people use ultraviolet rays to transform small molecular substances, which can irreversibly transform small molecular substances into macromolecular substances, which improves the overall quality of the product. With the development of technology, coatings, inks, glues and other fields have vigorously developed and used UV curing technology, which has further enhanced the competitiveness of products in the industry. UV curing can make the production process more skilled and increase the drying speed of the product. The cost is relatively low, and the operation is not only safe and sanitary, but also very efficient. Generally speaking, the faster the curing speed of the pigment color, the lower the required UV energy value. The opposite is also true. However, the color of the pigment is not directly related to the drying speed of the pigment. Third, the key role of UV energy meter in the field of pigment color curing The application principle of UV curing technology in the field of color curing is mainly to use the absorption relationship of the pigment color to the ultraviolet band. Their absorption strength is inversely proportional to the curing speed. In addition, in the field of UV curing, the darker and darker colors tend to have stronger absorption of light, and it is more difficult for UV curing because they absorb the energy of the entire ray band during the curing process. For white materials such as titanium dioxide, it can effectively reflect all wavelengths of UV curing energy. Moreover, the absorption wavelength of titanium dioxide is about 380nm, and it can fully reflect light with a wavelength of 420nm. Therefore, our professional technicians need to use a UV energy meter when operating UV curing to measure different UV energies, which can give the constructor a clear numerical reference.

#UV energy meter #UV curing

Types of UV germicidal lamps

UV lamp is a germicidal lamp that everyone has heard and heard. Many aquarists are considering whether to add a UV lamp to the fish tank to sterilize and remove algae. However, many aquarists will say that UV light cannot be used in the aquarium because it will kill the nitrifying bacteria and some beneficial bacteria in the aquarium. Can UV lamps be used, and how? Let's just talk about the UVC lamp used in your aquarium. UVC is composed of ultraviolet rays with a band of 200-275nm. Known as short-wave sterilizing ultraviolet rays, it has weak penetrating power and cannot penetrate most glass and plastics, but it is extremely destructive to cells. If it is irradiated on human skin, it can cause skin burns, redness, swelling and shedding in a short time. If you shoot fish directly, think about the consequences. Therefore, we must avoid direct exposure of UV light to the water, fish, human body, etc. Types of UV germicidal lamps From the method of using UV germicidal lamp: ① put the lamp directly into the filter tank, called immersion type (must be covered to prevent ultraviolet rays from outside); ② put the ultraviolet lamp in a sealed and shielded pipe and equip it A low-power water pump is called an over-flow type (currently aquariums mainly use this type). At present, there are two types of over-flow germicidal lamps in the market: ①External type, installed in the filter pump system, the outlet of the pump is connected to the water inlet pipe of the germicidal lamp, and it flows through the filter cotton after disinfection. ②Submersible type (recommended), complete the nitrification filtration and sterilization process separately. Place filter cotton in the water inlet pipe of the first layer to physically filter water impurities, and place biochemical cotton on the second layer to collect and cultivate nitrifying bacteria. It is basically impossible to cause harm to nitrifying bacteria when flowing through the UV germicidal lamp. 1. Will using a special UV lamp for aquarium kill even nitrifying bacteria? No, the UV lamps used in the aquarium are all sealed. The water flow only kills the germs and viruses carried in the water flow, while the digestive bacteria mainly grow on the filter material and have little effect. The UV lamp only sterilizes the water circulating through the irradiated pipeline, and has no effect on the beneficial bacteria attached to the filter material. However, within one week after adding the nitrifying bacteria, try to avoid using the UV lamp because the nitrifying bacteria adhere to the filter material It will take some time. Ultraviolet rays will produce strong oxidizing ozone during use, which can effectively kill bacteria in two-pronged manner, but UV lamps cannot be used in aquariums for 24 hours, because the ozone generated by it will cause damage to the nitrifying bacteria on the filter material when circulating in the water body. . 2. The UV lamp does not need to be turned on for a long time. It is controlled by an intermittent device. I think it is enough to turn on for 2-3 hours each time. 3. Activated carbon filter can be installed in the filter tank (before nitrocellulose) to absorb ozone, heavy metals, and drugs, thereby avoiding damage to nitrifying bacteria. UVC meter can be used to test the uv irradiation intensity. 4. It is said that while using UV germicidal lamp, it will convert nitrate with low toxicity into highly toxic nitrite. The result of this process sounds creepy, but in fact, only use germicidal lamp 1~ In the case of 2 hours, practice has proved that its impact on water quality is not enough, and in a sound nitrification system, this small impact can be ignored. But please pay attention to the aquarists who do not change the water for a long time! There may be too much nitrate in your aquarium, and if you use a germicidal lamp, it may indeed cause a heavy burden on the nitrification filtration system! 5. No one can guarantee whether the germicidal lamp will have a chemical effect with the medicine you are giving. So when the medicine is administered, not turning on the germicidal lamp is the correct way to ensure safety.

#uvc meter

Steel structure coating thickness detection

Thin steel structure fireproof coatings are chased by many fireproof coating manufacturers due to the large amount of work. However, the construction party often finds problems with the materials of steel structure fireproof coatings. In order to win your trust, the following introduces the construction of steel structure fireproof coatings. Method, I hope it helps you. Use a thickness gauge to detect the thickness of the fireproof coating for steel structures, and then feel the type of fireproof coating selected, check whether it is a thick fireproof coating, and then determine the fire resistance limit of the fireproof coating according to its thickness + variety to avoid quality problems. Then, calculate the fire resistance limit of the steel structure, and then confirm whether the selected fire retardant coating can reach the corresponding fire resistance limit and whether it meets the fire protection requirements. The quality of the thin steel structure fireproof coating is based on the thickness and whether it is ill. You can refer to the previous construction cases for painting. For the detection method of fire retardant coating thickness, please refer to: The measuring instrument for thin steel structure fire retardant coating thickness is: thickness gauge Specific use method of steel structure fireproof coating thickness gauge: During the test, the thickness gauge probe is generally pressed vertically on the surface of the coated steel component, and the thickness gauge reading is recorded. The inspection quantity is taken at 30% of the number of components, generally not less than 3 pieces. The specific methods are as follows: 1. For steel structure columns and beams, take a section every 1m in the length direction of the component, test the coating thickness of each surface of the component, and calculate the average value of all the measuring points as the coating thickness of the root component. Coating thickness tester can be used to test the paint thickness of the steel structure. 2. For truss structure and beam, take a cross section every 1m in the length direction of the upper and lower chords and web members, measure the coating thickness of each surface of the member, and calculate the average value of all measuring points as the coating thickness of the root member . 3. For the roof and steel stairs, select 5 points in each square range for measurement, and calculate the average of all measurement points as the coating thickness of the component.

#coating thickness tester

Use coating thickness gauge

Coating thickness gauge detects the thickness of steel anti-corrosion paint Although the corrosion of steel is important, it is indispensable to measure the thickness of steel anti-corrosion coatings. Linshang LS223 coating thickness gauge is a high-end product with a measuring range of up to 5000μm and a digital probe and ruby. The probe has excellent test accuracy and is very durable. Coating thickness gauge is an instrument that uses physical and chemical means to measure the thickness of the coating or coating on the surface of an object. According to whether the measured object is damaged, it can be divided into two categories: damage measurement and non-destructive measurement; according to the principle of its specific application, such as magnetic thickness measurement method, eddy current thickness measurement method, ultrasonic thickness measurement method, etc. are divided into tens Different categories. Because most of the time, the surface of the steel is artificially coated with a metal coating, so when measuring, most of them use a coating thickness gauge made by the magnetic thickness method to measure. In some special industries, such as printing and dyeing, chemical industry, paper making, etc., the thickness measurement of steel anti-corrosion coatings, you should choose a coating thickness gauge for anti-corrosion coatings. The coating thickness gauge LS223 produced by Lin Shang can be applied to a variety of different scenarios, saving trouble and worry. 2. What factors affect the optimal film thickness of steel anti-corrosion paint? The anti-corrosion function of steel structure is generally achieved by applying anti-corrosion paint, so many people think that the thicker the anti-corrosion paint is, the better. We can use the coating thickness gauge to detect the specific thickness of the anti-corrosion paint on the steel surface. In fact, how thick the anti-corrosion paint on the steel structure is is not determined by the will of our supervisor, mainly depends on the following three elements: 1. Corrosion factors of the environment where the workpiece is located, including sunlight, salt spray, humidity, high temperature, acid and alkali, grease, etc. 2. The required service life of steel structure parts. 3. Varieties of steel structure anti-corrosion paint. Different anticorrosive paints have different optimal paint film thicknesses, and different environments have different requirements for paint film thickness.

#coating thickness gauge

UV dosimeter test medical uv lamps

Medical ultraviolet lamps mainly sterilize and disinfect indoor air. There are two methods: indirect irradiation and direct irradiation. 　　Indirect irradiation method: the use of high-intensity ultraviolet air sterilizer has the advantage of reliable disinfection effect and can be used when there are people indoors. The disinfection time is generally 30 minutes. The principle of 　　 indirect irradiation method is to suck dirty air into the disinfection machine. The ultraviolet lamp is sealed in the disinfection room of the chassis of the air sterilizer, and the dirty air is filtered and sterilized before it is released. Since the ozone concentration in the air when the sterilizer is working is ≤0.1 mg/m³, human-machine coexistence can be achieved. 　　 High-intensity ultraviolet sterilizer has an ultraviolet peak wavelength of 253.7nm, which belongs to UVC, also known as short-wave sterilization. The shorter the ultraviolet wavelength, the greater the lethality. 　　Direct irradiation method: When there is no one in the room, use the ultraviolet lamp to irradiate directly. The number of disinfection lamps installed indoors is not less than 1.5W per cubic meter, and the irradiation time is not less than 30 minutes. The peak wavelength of the ultraviolet germicidal lamp is 253.7nm. UV disinfection lamp 　　The national regulations stipulate that the intensity of the ultraviolet lamp should be greater than 70uW/cm² at 1 meter below the center of the lamp. Ultraviolet lamps will attenuate, so the intensity of the lamp should be checked every time. 　　Intensity detection of ultraviolet lamp can use LS126C uv dosimeter. This is an instrument equipped with a 1 meter hook. The hook is made according to the length specified by the country. When using it, place the instrument directly under the vertical center of the lamp. The instrument has an automatic shutdown function. When no one operates for 10 minutes, the instrument automatically shuts down. When testing, personnel leave, turn on the lights after closing the door, to ensure that the personnel will not be injured by ultraviolet rays.

#uv dosimeter

UV sterilization

In a year when the corona virus has caused panic, we wear masks and use disposable gloves to defend against the virus, but sometimes it is really unpredictable, so many people think of ultraviolet lights, using ultraviolet light for anti-virus, then there is such a Question, in addition to whether the line lamp is useful for coronavirus, I also query a lot of information on this issue, I can tell everyone that it is useful. According to the newly released "Quick Guide for Diagnosis and Treatment of New Coronavirus Pneumonia", 75% alcohol, ether, chloroform, Formaldehyde, chlorine-containing disinfectants, peracetic acid, and ultraviolet light can inactivate viruses. In fact, we often get colds, coughs and other small diseases in real life. Everyone knows the real cause of colds. Generally, viral infections or bacterial infections are rarely caused by colds. Colds and colds are caused by a decrease in the body's cold resistance and colds caused by virus invasion. There are fewer environmental viruses, and cold is not cold. So after all, eliminating the virus is the top priority. So there are many external line lamps on the market, how to judge which one is qualified, then I recommend a product for you to use the ultraviolet radiation illuminance meter. The UV dosimeter can quickly detect the intensity of the ultraviolet lamp.

#UV dosimeter #UV sterilization

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