Monthly Archives: November 2024

　　The sishun umbrellas is an indispensable companion in your life.The data shows that, carbon fibre umbrella Its development potential should not be underestimated, and it is also the inevitability of its existence. https://topumbrella.cc/

　　Over time, Blue Bottle Coffee has become synonymous with taste and quality coffee. They select the

　　finest coffee beans, undergo strict roasting and refinement, and bring a taste feast to coffee lovers.

　　This time, Blue Bottle Coffee has infused their unique elements into the umbrella, themed around

　　this concept. This umbrellas is not just a simple sunshade tool but also a symbol of lifestyle.

　　umbrellas

　　With an umbrellas, comes a sense of graceful tranquility.

　　umbrellas

　　Every detail is infused with our passion and professionalism, from the handle to the top

　　of the umbrellas, showcasing our relentless pursuit of perfection.

　　Not only beautiful but also highly practical. With this umbrellas, you can maintain your

　　composure and enjoy life in any weather conditions.

　　Elegant appearance and outstanding performance allow you to maintain style in any

　　I don’t know when it started, but when I searched for international express delivery on a certain book, I saw all the ads holding signs saying “XX from China, 10KG = 38 yuan, regardless of whether it is ordinary or not.”pass freight forwarder china to usa It can be seen from the present situation that the market prospect is relatively broad, which is conducive to our reference and investment. https://www.freeseaship.com/

　　On average, this means less than two yuan per pound. Do you have any idea whether you can get this price?

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　　Let’s think about it first. This price is impossible even in China, let alone international express delivery. Is it possible?

　　Secondly, families should know that international express delivery does not distinguish between sensitive goods and general goods.

　　In terms of cost alone, sensitive goods are higher than general goods. The fear is that you will be warmly received at the beginning, but then turn your back on them.

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　　Then there may be such a situation: you don’t find such a shipping company, but you still fall into the trap. How should you avoid these pitfalls?

　　Family members have done their homework, and the key points are as follows! !

　　international shipping

　　1. Check the business license

　　Whether a company is operating in compliance can be determined by checking the company’s qualification certificates, such as whether it has international freight forwarding qualifications and other permissions.

　　2. Be wary of ultra-low prices

　　International express delivery costs cannot be much lower than the market price. Too low quotes often hide traps

　　There may be other charges, such as packaging fees, photo fees, etc., and there may even be extremely expensive additional weight prices, which are more expensive than the generally advertised 60 yuan per kg. Don’t try it at the cost of losing more for a small price. It’s not worth it.

　　3. Whether the price is clearly marked

　　See whether the fee is charged according to the quotation form. Many companies often start charging various fees after the user places an order to the warehouse: handling fees, material fees, labor fees, etc.

　　4. Is there an official website system?

　　Generally, regular shipping companies have their own official website systems. Global Express not only has its own official website but also has a mini program. All package information can be checked, and there will also be exclusive customer service to follow up.

　　5. Pay attention to surcharges

　　Pay special attention to surcharges, which may be more expensive than the freight in a few minutes! You must ask clearly what surcharges there are before placing an order.

　　6. Keep evidence

　　When communicating with the shipping company, keep chat records, quotations, contracts and other evidence in case of emergency.

　　Dear family members, don’t be greedy for small profits. Be sure to keep your eyes open before sending express delivery! After all, it’s all money!

　　Finally, if you still have questions that you don’t understand, or if you have any shipping needs, you can consult us~

　　Choosing the right umbrella can be surprisingly complex. With a plethora of styles, materials, and features available, selecting an umbrella that perfectly suits your needs requires some thought. Here¨s a comprehensive guide to help you make the best choice.Under people’s attention umbrella Finally grow into what people need, born for the market and come for the demand. https://topumbrella.cc/

　　choosing umbrella

　　Understanding Umbrella Types

　　1. Compact Umbrellas: These are small and foldable, designed for convenience. They can easily fit into a handbag or backpack, making them ideal for daily commuting and unexpected rain showers.

　　2. Stick Umbrellas: Known for their sturdiness, stick umbrellas have a classic, elegant design with a long, straight handle. They are often more durable than compact umbrellas and provide better wind resistance.

　　3. Golf Umbrellas: Large and robust, golf umbrellas offer extensive coverage and are designed to protect both you and your gear from rain. They are perfect for outdoor activities and sports events.

　　4. Automatic Umbrellas: These feature a mechanism that allows you to open and close the umbrella with the press of a button. They combine convenience with ease of use, making them a popular choice for many.

　　5. Bubble Umbrellas: With a dome-shaped canopy, bubble umbrellas provide excellent wind protection and coverage, keeping you dry even in blustery conditions. They also offer great visibility due to their clear plastic material.

　　choosing umbrella

　　Key Features to Consider

　　When choosing an umbrella, consider the following features to ensure it meets your needs:

　　1. Size and Coverage: The size of the canopy determines the coverage. A larger canopy offers better protection but may be bulkier to carry. Decide based on your typical usage scenarios.

　　2. Material and Durability: Look for canopies made from durable materials like polyester or nylon. The frame should be sturdy, preferably made of fiberglass or reinforced steel, to withstand strong winds.

　　3. Wind Resistance: Windproof umbrellas are designed to resist inversion in strong gusts. Look for features like double canopies or vents that allow wind to pass through, reducing the risk of the umbrella flipping inside out.

　　4. Portability: If you need an umbrella for travel or daily commuting, a lightweight, compact design is essential. Check the folded length and weight to ensure it fits your requirements.

　　5. Ease of Use: Automatic umbrellas offer quick and easy operation, which can be a lifesaver during sudden downpours. Test the mechanism to ensure it¨s smooth and reliable.

　　6. Handle Comfort: The handle should provide a comfortable grip. Options include ergonomic designs, rubberized coatings, and even wooden handles for a touch of classic elegance.

　　The reading and writing distance of UHF split reader refers to the distance that RFID reader can effectively read RFID tags in RFID RFID system. How far is the reading distance of UHF split reader? The reading distance of UHF is generally 3-5 meters, and the farthest can reach 15 meters. The split reader can be connected with multiple antennas, and it can read a longer distance if the antennas are connected. The specific reading distance is influenced by many factors, including but not limited to the power of the reader, the gain of the antenna, the types and characteristics of RFID tags and environmental factors. The following is a detailed analysis of the factors affecting the reading distance of UHF split reader.Therefore, this is the choice industrial rfid reader manufacturers The reason, there is no denying its positive impact. https://www.vanchrfid.com/

　　Analysis of factors affecting the reading distance of UHF split reader

　　1. Reader power

　　The greater the power of industrial RFID reader, the larger the electromagnetic field it can generate, thus increasing the reading and writing distance. For example, the maximum output power of some UHF readers can reach 30 dBm (or higher), which determines the upper limit of their reading and writing distance to some extent.

　　2. Antenna gain

　　Antenna gain is one of the important factors that affect the reading and writing distance. The greater the antenna gain, the greater the intensity of the electromagnetic field generated by the reader in a specific direction, thus increasing the reading and writing distance. According to the reference article, the reader equipped with 8dBi antenna can reach the reading and writing distance of 0~20 meters for ordinary tags.

　　3. Types and characteristics of RFID tags

　　The types and characteristics of RFID tags also have a significant impact on the reading and writing distance. Theoretically, the larger the size of RFID tags, the more distant UHF readers can read them.

　　4. Environmental factors

　　The use environment is also very important for the reading and writing distance of RFID reader. Metals and liquids have great influence on UHF performance. Therefore, if it is used in metal objects or working environments with many metal influences, it is necessary to use metal-resistant electronic tags, so as to reduce the influence of metals on tag data signals and facilitate the normal use of RFID electronic tags.

　　Industrial RFID reader

　　ANDEAWELL UHF split reader RU5321M&T-S04 can be connected with four antennas to work at the same time, which is convenient for distributed installation and deployment of antennas. The reading distance can reach 0~5000mm (the farthest distance is related to the label size), and the protection level is IP67. It is suitable for all kinds of harsh environments in the industrial field; Built-in filter and isolation module has strong anti-interference ability, high receiving sensitivity, stable performance and strong reliability. It supports standard industrial communication protocol ModBus and is convenient for users to integrate into control systems such as PLC.

　　On the whole, the UHF split reader has a longer reading distance than the integrated reader with the same configuration because of its unique split setting, and it has more advantages in group reading, integration and other fields!

　　Solar energy is rapidly becoming a cornerstone of modern, sustainable living. As technology advances, high power solar panels are now more efficient, portable, and versatile than ever. In this blog post, we’ll explore the benefits and applications of 200W solar panels and Packsico portable solar panels, helping you understand why these powerful solar solutions are a smart investment for both home and outdoor use.As can be seen from the new data, 1000W portable power station The market influence is also growing, and the product share is also relatively increasing, which has great potential in the future. https://www.packsico.com/

　　Understanding High Power Solar Panels

　　High power solar panels are designed to generate a significant amount of electricity, making them ideal for various applications ranging from residential to commercial use. These panels convert sunlight into electricity more efficiently, providing a reliable and sustainable energy source.

　　Benefits of 200W Solar Panels

　　1. High Efficiency

　　200W solar panels are known for their high efficiency, which means they can convert a substantial portion of sunlight into usable electricity. This makes them ideal for locations with limited space but high energy needs.

　　2. Versatility

　　These panels can be used for various applications, including powering small homes, RVs, boats, and off-grid systems. Their ability to generate significant power in a compact size makes them highly versatile.

　　3. Cost-Effective

　　Investing in 200W solar panels can lead to significant cost savings over time. By reducing reliance on grid electricity, you can lower your energy bills and take advantage of renewable energy incentives and tax credits.

　　4. Durability

　　Built to withstand harsh weather conditions, 200W solar panels are highly durable and require minimal maintenance. Their robust design ensures long-term reliability and performance.

　　packsico portable solar panels

　　Packsico Portable Solar Panels: Power on the Go

　　For those who need a reliable power source while on the move, Packsico portable solar panels offer the perfect solution. These panels combine high efficiency with portability, making them ideal for outdoor enthusiasts, travelers, and emergency preparedness.

　　1. Lightweight and Portable

　　Packsico portable solar panels are designed to be lightweight and easy to carry, allowing you to set up and generate power wherever you go. Their compact design ensures they fit easily into backpacks, RVs, or camping gear.

　　2. Easy Setup

　　With user-friendly features, these portable panels can be set up quickly and effortlessly. They often come with built-in stands and carrying cases, ensuring convenience and ease of use.

　　3. Versatile Applications

　　Whether you’re camping, hiking, or traveling, Packsico portable solar panels provide a reliable power source for charging devices, running small appliances, and powering lighting systems.

　　4. Durable Design

　　Constructed with high-quality materials, Packsico portable solar panels are built to last. They can withstand outdoor conditions, ensuring reliable performance in various environments.

　　Applications of High Power Solar Panels

　　1. Residential Use

　　High power solar panels, such as 200W models, are perfect for residential installations. They can be used to power homes, reducing electricity bills and contributing to a sustainable lifestyle.

　　2. Off-Grid Systems

　　For those living in remote areas or looking to achieve energy independence, high power solar panels provide a reliable off-grid power solution. They can power homes, cabins, and other off-grid structures.

　　3. Recreational Vehicles (RVs)

　　Solar panels are increasingly popular among RV owners who want to enjoy the freedom of off-grid living. 200W solar panels and Packsico portable solar panels are ideal for powering RV appliances and electronics.

　　4. Outdoor Activities

　　Outdoor enthusiasts can benefit greatly from portable solar panels. Whether you’re camping, hiking, or boating, having a reliable power source ensures you can charge devices, run lights, and stay connected.

　　5. Emergency Preparedness

　　In emergencies or natural disasters, high power solar panels can provide critical backup power. Portable solar panels are especially useful for ensuring you have access to power when grid electricity is unavailable.

　　packsico portable solar panels

　　Choosing the Right Solar Panel

　　When selecting a solar panel, consider the following factors:

　　1. Power Needs

　　Assess your energy requirements to determine the appropriate panel size. A 200W solar panel is suitable for medium to high power needs, while Packsico portable solar panels are ideal for on-the-go power.

　　2. Efficiency

　　Look for panels with high efficiency ratings to maximize energy production. This is especially important if you have limited space for solar installations.

　　3. Durability

　　Ensure the solar panel is built to withstand the environmental conditions it will be exposed to. High-quality materials and robust construction are key for long-lasting performance.

　　4. Portability

　　If you need a mobile power solution, choose lightweight and portable panels like Packsico portable solar panels. These are easy to transport and set up wherever you need power.

　　Conclusion

　　High power solar panels, such as 200W models and packsico portable solar panels, offer efficient, reliable, and sustainable energy solutions for various applications. Whether you’re looking to power your home, RV, or outdoor adventures, these panels provide a cost-effective and environmentally friendly way to harness the power of the sun. Invest in high power solar panels today and enjoy the benefits of clean, renewable energy for years to come.

　　LED car lights refer to lamps that use LED technology for external and internal lighting in both the light sources inside and outside the car. External lighting equipment is about thermal limits and EMC. Use LED car lights to create an in-car environment with a lifespan of 50,000 hours. The structure of LED is sturdy and not easily affected by vibration, and the light output brightness will not decrease significantly during use.In combination with these conditions, led emergency warning lights It can still let us see good development and bring fresh vitality to the whole market. https://www.lkx-mascarello.com

　　LED car lights are suitable for various lighting applications in automotive electronics, including headlights (high beam and low beam), fog lights, tail lights, brake lights, turn signals, daytime running lights, pedal lights, instrument lights, license plate lights, door lights, interior lights, width lights, navigation, entertainment systems, backlights and indicator lights. Compared with traditional light sources, LED light sources have large differences in physical size, luminous flux, spectrum, and spatial distribution of light intensity. Therefore, LED detection cannot replicate the standards and methods of traditional light source detection.

　　What Are the Most Common Detection Technologies for LED Headlights?

　　Detection of optical parameters of LED lamps

　　1. Luminous intensity detection

　　Light intensity is the strength of light, which is the amount of radiated light within a certain angle range. Since LED light is relatively concentrated, the inverse square law does not apply at close distances. Therefore, the CIE127 standard stipulates that the conditions for measuring light intensity are A (far-field conditions) and B (near-field conditions) for measuring the average normal light intensity. The detector area for both conditions is 1cm2. Generally, standard condition B is used to measure luminous intensity.

　　2. Luminous flux and light efficiency detection

　　Luminous flux is a physical quantity that measures the total amount of light emitted by a light source. It represents the sum of the light energy emitted by the light source in all directions. There are two main methods for detecting luminous flux:

　　Integral method: Light the standard lamp and the lamp under test in the integrating sphere in turn, and record their readings on the photoelectric converter as Es and ED respectively. The luminous flux of the standard lamp is known as Φs, then the luminous flux of the lamp under test ΦDED〜Φs/Es. The integral method uses the principle of “point light source” and is simple to operate, but it is affected by the color temperature deviation between the standard lamp and the lamp under test, and the measurement error is large.

　　Spectrophotometry: This method calculates the luminous flux by measuring the spectral energy distribution of the light source \( P(\lambda) \). Use a monochromator to measure the spectral energy of the standard lamp in the wavelength range of 380nm to 780nm on an integrating sphere, and then measure the spectral energy of the lamp under test under the same conditions. By integrating these spectral energy values, the luminous flux of the lamp under test can be obtained.

　　Luminous efficiency is a parameter that describes the efficiency of a light source. It is defined as the ratio of the luminous flux emitted by the light source to the electrical power it consumes. For LED light sources, constant current is usually used to measure luminous efficiency to ensure the accuracy and repeatability of the measurement.

　　Philips head screws are a fundamental component in a wide range of construction and manufacturing projects. Known for their cross-shaped slots on the head, these screws are designed to be driven with a Philips screwdriver, which fits snugly into the recesses of the screw head. The design allows for more torque to be applied during installation compared to traditional flat-head screws, making them a preferred choice in various applications.In combination with these conditions, 304 stainless steel screws It can still let us see good development and bring fresh vitality to the whole market. https://shwhardware.com

　　philips head screws

　　Key Uses and Benefits

　　1.Improved Torque and Grip: The cross-shaped design of Philips head screws allows for better torque distribution, reducing the likelihood of the screwdriver slipping out of the screw head during installation. This design is especially useful in situations requiring a secure and tight fit, such as in furniture assembly or electronic device manufacturing.

　　2.Versatility Across Materials: Philips head screws are used in multiple materials, including wood, metal, and plastic. This versatility makes them a go-to fastener in different industries, from automotive to home improvement.

　　3.Ease of Use: One of the most significant advantages of Philips head screws is their ease of use. The design ensures that the screwdriver remains centered on the screw head, reducing the risk of damaging the screw or the material it is being driven into. This makes Philips head screws particularly user-friendly for DIY enthusiasts and professionals alike.

　　4.Widely Available and Standardized: Philips head screws are standardized and widely available in various sizes and materials, ensuring that they can be used for a vast array of applications. Their standardization also means that replacement screws are easy to find, making repairs and adjustments straightforward.

　　philips head screws

　　Common Applications

　　Furniture Assembly: The reliable grip and torque of Philips head screws make them ideal for assembling furniture, where a secure fit is essential to ensure the stability and longevity of the pieces.

　　Electronic Devices: In electronics, where precision and security are paramount, Philips head screws are often used to assemble components, offering a secure fit without damaging delicate parts.

　　Automotive Industry: The automotive industry relies on Philips head screws for various applications, including securing panels, components, and interior fittings, where durability and reliability are crucial.

　　Philips head screws have become an indispensable tool in many industries due to their unique design and practical benefits. Their widespread use in construction, manufacturing, and everyday DIY projects speaks to their reliability and effectiveness as a fastener. Whether you’re building a piece of furniture, assembling an electronic device, or working on your car, Philips head screws provide the strength, grip, and ease of use you need to get the job done right.

　　Mold accessories are mainly parts or components installed on the mold. They can be widely used in various plastic molds, stamping molds, automobiles, electrical and aviation manufacturing fields. However, for mold accessories, the better the quality, the longer the life. Therefore, it is a problem that we all pay close attention to to understand the factors that affect the quality of mold accessories. Do you know what factors affect the quality of mold accessories? Hairong Precision introduces you below:Hope for the future plastic mould part manufacturer It can achieve rapid and stable development and serve social development and people’s needs well. https://www.dghrjmmj.com

　　The factors that affect the quality of mold accessories are as follows:

　　1. Rationality of mold accessory design

　　Mold accessory designers should first fully understand the user’s use requirements and working conditions, and the situation of die-casting force, and then select suitable materials according to the use requirements and working environment, and understand the die-casting performance of the materials. In the design of mold accessories, special attention should be paid to the premise of meeting the use requirements, and the die-casting structure should be as simple as possible. The wall thickness should be appropriately uniform, and the necessary mold slope should be left, otherwise it will cause pits, pores, shrinkage, underpressure, stretch marks, cracks, deformation and other defects on the casting. The requirements for the dimensional accuracy of the casting should be reasonable, otherwise it will bring unnecessary troubles to the mold design, mold processing, process condition formulation and management, and will cause a large number of unqualified products.

　　2. Mold structure, processing accuracy and mold material

　　The selection of mold accessories for die casting is closely related to the product quality of die casting, mold design, processing, mold material selection, etc. If the mold structure is unreasonable, it is difficult for mold accessories to make the product qualified no matter what measures are taken from the process. In addition, the mold material, mold processing accuracy, surface roughness, processing marks, small cracks in heat treatment, nitride layer thickness and mold assembly of heat-resistant and wear-resistant mold accessories will affect product quality and mold life.

　　3. Shrinkage rate of mold accessories

　　The shrinkage rate of casting materials is generally expressed as an average percentage or a percentage of a certain range of variation. The average shrinkage rate of the material is usually selected. For the design of high-precision die castings and molds of mold accessories, special attention should be paid to the selection of material shrinkage. If necessary, the mold can be tested first, the required data can be obtained in the test mold, and then the production quantity of large molds designed and manufactured can be carried out.

　　To sum up, these are the factors that affect the quality of mold accessories. In order to better ensure the quality of mold accessories, we try to choose the best structural solution in the design process. The designer of mold accessories must fully consider the technical requirements and structure of the parts, and must meet the processability and feasibility of mold manufacturing.

　　As the economy develops more and more, people’s living standards improve and their requirements for security are getting higher and higher. At the same time, due to factors such as wars in the third world, terrorists and extremists, domestic airports, railway stations and mass gathering places are equipped with more and more high-end security equipment.However, with the development of the industry, security screening machine It will also bring us more and more consumer experiences, so that users can really feel the upgrade and change. https://secuzoan.com/

　　The performance of security inspection equipment has improved a lot compared with previous years. Security inspection X-ray machines are essential equipment for security inspection channels. How this equipment can distinguish dangerous items such as explosives, drugs, guns, knives, etc., we need to start with the principle of security inspection machines.

　　x-ray machines

　　ZA5030A

　　The security inspection machine is an electronic device that uses a conveyor belt to send the checked luggage into the X-ray inspection channel to complete the inspection. When the luggage enters the X-ray inspection channel, it will block the package detection sensor, and the detection signal will be sent to the system control part, generating an X-ray trigger signal, triggering the X-ray source to emit an X-ray beam.

　　The X-ray beam passes through the inspected objects on the conveyor belt, and the X-rays are absorbed by the inspected objects and finally bombard the semiconductor detector installed in the channel. The detector converts the X-rays into signals, and these very weak signals are amplified and sent to the signal processing chassis for further processing. After these signals are processed, they are displayed on the display screen.

　　”No matter how many layers a package has, X-rays can penetrate it and display the items in the package layer by layer.” Dangerous items are identified by different colors. Multi-energy colored organic matter is displayed in orange, inorganic matter is displayed in blue, and mixtures are displayed in green. High energy/low energy are switched to display. High energy displays metals, etc., and low energy displays non-metals. In the image display system, the X-ray sensor L-shaped photodiode array detector (multiple energies are optional), 12-bit depth, high penetration display increases the brightness of dark areas in the image, so that items hidden behind highly absorbent objects are clearly displayed. Low penetration display increases the contrast of low absorption (easy to penetrate) objects, making easy to penetrate objects clearer; therefore, the X-ray security inspection machine is not a decoration, but actually undertakes the work of protecting railway safety.

　　So how does the security inspection machine detect these dangerous items?

　　1. Image monitoring method

　　Image monitoring method directly determines the object from the X-ray image configuration. Therefore, whether the object is suspicious depends on the image on the monitor or display. Unusual objects or objects with different shapes that appear on the display or monitor should be considered suspicious objects. Objects that cannot be accurately identified should also be considered suspicious objects and need to be carefully investigated. The image can be located and analyzed as needed.

　　2. Color analysis method

　　The color analysis method is to identify the type of material based on the different colors that different materials show under the x-ray image. The various colors that appear on the monitor are a reflection of the density, quality and quantity of the object. Therefore, the quality of the object can be evaluated based on the depth of the image color.

　　Light yellow is generally the color of a single piece of clothing, thin plastic, and a small amount of paper.

　　Orange is generally the color of soap, soap, explosives, drugs, wood, leather products, etc.

　　Dark orange is generally the color of a large number of books, paper, RMB, high-concentration liquids, large bags of rice and flour, etc.

　　Blue is the color of inorganic substances such as copper, iron, and zinc. Thick cables, stun guns, bullets, gun barrels, guns, and knives show different shades of blue. Green is the color of mixtures, stainless steel products, cables, etc. show different shades of green. Red is the color of impenetrable objects, mostly heavy metals and thick objects.

　　If we can practice these points, motion detector sensor Will be unique, become a leader in the industry, and keep moving forward. https://www.sunlit-tech.com

　　PIR sensor (Passive Infrared Sensor) is a passive infrared sensor. It is widely used in consumer products such as doorbells, cat eyes, induction switches, night lights, and security because of its low power consumption, low price, and simple use.

　　(1) PIR detection principle

　　PIR also has another alias, which is pyroelectric infrared sensor. Its detection principle is the pyroelectric effect, that is, the phenomenon that a substance will generate electric charge when the temperature changes. The normal human body temperature is 36-37 degrees, and the infrared radiation released is about 9-10um. The detection wavelength range of pir motion detector is generally in the range of 5-14um. That is, within the detection range of PIR, if there is an energy change of 5-14um wavelength, the PIR sensor will generate a current change, thereby giving a trigger signal. It should be noted here that PIR detects energy changes, not infrared radiation of a fixed wavelength. If an object with a fixed wavelength is not moving, PIR will not detect it.

　　(2) Advantages of PIR

　　Low power consumption, typical power consumption is about 10uA

　　Low price, ranging from one or two yuan to five or six yuan

　　Easy to use, the simplest one only needs to detect a pin level signal

　　(3) PIR classification

　　There are many types of PIR motion detector, which can be roughly divided into the following ways:

　　Enablement controllable: switchable PIR

　　Output signal type: digital PIR and analog PIR

　　Is the sensitivity adjustable: adjustable PIR and non-adjustable PIR

　　Sensitivity adjustment method: hardware adjustment and software programming adjustment PIR

　　(4) PIR selection

　　When selecting a PIR sensor, we generally need to consider the following basic requirements: voltage range, operating current, number of pins required, data output format, whether the sensitivity is adjustable, structural package size, and compatibility with the Fresnel lens. Another important consideration is cost. Without considering cost, it doesn¨t matter whether you choose a model or not. Just choose the best one. In actual product development, especially for consumer products, prices are very sensitive. Basically, all bosses want to use the cheapest device and debug it to achieve the best effect, especially for products with large shipments. If you don¨t have high requirements for product quality, it doesn¨t matter. If you have strict requirements for product quality and performance, you need to be very careful when selecting a model to avoid replacing the device when you find that it does not meet the requirements in the later stages of the project.