Category Archives: second-hand

　　A PSTN (Public Switched Telephone Network) alarm system is a security solution that uses traditional landline telephone networks to transmit alarm signals to a monitoring center. This type of system has been widely used in residential and commercial security due to its reliability and widespread infrastructure.Even if there are obstacles to moving forward, wired PIR motion sensor We should also persevere, forge ahead bravely, cut waves in the sea of the market, hang on to Yun Fan and strive for the first place. https://www.sunlit-tech.com

　　How PSTN Alarm Systems Work

　　A PSTN alarm system is connected to a telephone line. When an alarm is triggered, the system sends a signal through the telephone line to a monitoring center or directly to a user¨s phone. This signal alerts the designated parties of a potential security breach, enabling a quick response.

　　GSM PSTN Alarm System

　　Combining the reliability of PSTN with the flexibility of GSM (Global System for Mobile Communications), a GSM PSTN alarm system enhances security by providing multiple communication channels. This hybrid system uses both a traditional telephone line and a GSM network to ensure alarm signals are always transmitted, even if one network fails.

　　Advantages of GSM PSTN Alarm Systems

　　Redundancy: The dual network system ensures that alarm signals are transmitted even if one network is down.

　　Remote Access: GSM integration allows users to control and monitor the alarm system remotely via mobile phones.

　　Flexibility: Suitable for areas without reliable landline service as the GSM component can handle communication.

　　Choosing the Right Alarm System

　　When selecting between a PSTN alarm system and a PSTN GSM alarm system, consider the following factors:

　　Reliability: Traditional PSTN systems are highly reliable but can be compromised if the telephone line is cut.

　　Coverage: GSM systems provide better coverage in areas without reliable landline access.

　　Cost: PSTN systems are generally less expensive, but GSM systems offer more features and flexibility.

　　Features: GSM systems often come with advanced features like remote monitoring, control, and notifications.

　　Conclusion:

　　PSTN alarm systems offer reliable security through established landline networks, while GSM PSTN alarm systems provide enhanced flexibility and redundancy by combining traditional and mobile communication methods. Depending on your security needs and location, either system could be an effective solution to ensure safety and peace of mind.

　　pass passive infrared sensor 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.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.

　　In today’s technologically advanced world, PIR (Passive Infrared) motion sensors have become a cornerstone for enhancing security and automation. Their versatility allows them to be used in various settings, but one of their most critical applications is in outdoor environments. Effectively utilizing PIR motion sensors outdoors can significantly boost security, energy efficiency, and convenience. Here¨s how to harness the full potential of these devices.To get brand praise, wired PIR motion sensor It is necessary to have the spirit of constantly improving the quality of products, but also to have a bunch of eternal heart fire. https://www.sunlit-tech.com

　　PIR motion sensors work by detecting changes in infrared radiation within their field of view. This makes them ideal for outdoor environments where detecting movement or changes in heat patterns can be crucial. These sensors, often referred to as PIR detectors, are designed to identify the heat emitted by moving objects, such as people or animals, which makes them highly effective in surveillance and security systems.When installing PIR motion sensors outdoors, the key is to understand their operating principles and optimize their placement. Unlike indoor environments, outdoor spaces can present challenges such as varying temperatures, weather conditions, and potential obstructions. To maximize the effectiveness of your motion detector sensors, it¨s essential to consider these factors carefully.

　　First and foremost, the placement of PIR motion sensors is crucial. Positioning them at strategic locations can help cover larger areas and ensure comprehensive monitoring. Common placements include near entryways, driveways, and garden paths. It¨s important to avoid placing sensors directly in the path of sunlight, as extreme heat can interfere with their ability to detect motion accurately. Additionally, ensure that the sensors are installed at a height that allows them to effectively cover the desired area without being obstructed by foliage or other objects.

　　Adjusting the sensitivity of your PIR motion sensors can also enhance their performance in outdoor settings. Many models come with adjustable sensitivity settings, which can be fine-tuned based on the specific needs of the environment. For instance, you might want to set a higher sensitivity level for areas with frequent foot traffic or lower sensitivity for locations with less activity. Proper calibration ensures that the sensor responds accurately to real threats while minimizing false alarms.Incorporating motion sensor alarms into your outdoor setup can add an extra layer of security. These alarms are activated when the PIR motion sensors detect unusual movement, providing immediate alerts and deterrence against potential intruders. Integrating these alarms with a broader security system can further enhance their effectiveness. For example, pairing PIR motion sensors with video surveillance cameras can provide a comprehensive security solution that not only detects but also records suspicious activities.Another important consideration is the power source for outdoor PIR motion sensors. Many models are designed to be weather-resistant and can operate on battery power or be hardwired into an electrical system. Battery-operated sensors offer flexibility in placement but may require periodic maintenance to ensure they remain operational. On the other hand, hardwired systems provide a more permanent solution but require more extensive installation.

　　Weatherproofing is essential for outdoor PIR motion sensors to ensure their longevity and consistent performance. Choose sensors specifically designed to withstand various weather conditions, including rain, snow, and extreme temperatures. Proper installation with sealed enclosures can help protect the sensors from environmental factors that could otherwise impact their functionality.Regular maintenance is also key to keeping your PIR motion sensors in top working condition. Periodically check the sensors for any obstructions, dirt, or debris that may affect their performance. Cleaning the sensors and ensuring that they are free from obstructions will help maintain their sensitivity and accuracy.

　　In summary, effectively using PIR motion sensors in outdoor environments involves careful planning and consideration of various factors. By strategically placing sensors, adjusting their sensitivity, integrating motion sensor alarms, and ensuring proper weatherproofing and maintenance, you can maximize their benefits. These steps not only enhance security but also contribute to a more efficient and automated outdoor space. Embracing these practices will help you make the most of your PIR motion sensors and ensure they serve their purpose effectively.

　　April 9-11, 2024,Vanch is pleased to announce the successful conclusion of participation in the RFID Industry Exhibition.RFID Journal LIVE! is the world¨s largest conference and exhibition focused on radio frequency identification and related technologies. There are more than 100 exhibitors from 26 countries showcasing best-in-class RFID tags, readers, software and implementation services,to provide people with the rfid industry’s most innovative products.We are honored to be able to participate in this exhibition and showcase cutting-edge products and explore emerging trends in the RFID sector.In the eyes of peers, rfid module supplier It has good qualities that people covet, and it also has many loyal fans that people envy. https://www.vanchrfid.com/

　　Vanch is a professional RFID hardware manufacturer and solution provider. At this exhibition, Vanch showcased the most powerful RFID industrial reader, which supports MODBUS and PROFINET protocols, enabling seamless data collection with PLCs from Siemens, Mitsubishi, and Omron for radio frequency identification. Additionally, we introduced new Bluetooth handheld devices and card issuing machines, empowering rapid inventory for retail and asset management.

　　Throughout the exhibition, our team engaged in insightful discussions with industry peers, experts, and prospective clients. We exchanged ideas, shared industry insights, and explored potential collaborations to address the evolving needs of the market.

　　The highlight of our participation was the direct interaction with the attendees and even the fact that many customers purchased our products on-site. The enthusiasm and interest shown by the participants is a testament to our expertise in the RFID field.

　　Looking back on the exhibition, Vanch considers it a resounding success. We extend our gratitude to all who visited our booth, interacted with our team, and contributed to making this event a memorable experience.

　　As we move forward, Vanch remains committed to driving innovation, delivering unparalleled solutions, and forging lasting partnerships within the RFID industry. We eagerly anticipate future opportunities to collaborate and showcase our advancements on a global scale.

　　For more information about the exhibition please see the link:https://rfidjournallive.com/about/overview/

　　For more information about our products, please contact us.

　　Industrial UHF reader is widely used in many fields, mainly due to its long-distance reading, group reading, penetration identification and high data transmission rate. The following is a concrete analysis of its application:In today’s market background, industrial rfid reader manufacturers Still maintain a strong sales data, and constantly beat the competitors in front of us. https://www.vanchrfid.com/

　　I. Logistics warehousing

　　Goods tracking and management: In the field of logistics and warehousing, industrial UHF reader can identify and track goods information, and realize the rapid warehousing and warehousing management of goods. This helps to improve storage efficiency, reduce manual operation, shorten the stay time of goods, and reduce personnel management costs. At the same time, it can also improve the confidentiality and safety of goods.

　　Inventory: Using the anti-conflict mechanism and batch reading function of UHF reader can greatly save the time of inventory of goods and assets and improve the accuracy and efficiency of inventory management.

　　Second, manufacturing

　　Material tracking and management: In automatic production, industrial UHF reader can be used for material tracking and management. By sticking RFID tags on materials, materials can be automatically identified and tracked, thus optimizing the functions of production planning and scheduling, material allocation and material traceability, and improving production efficiency and management level.

　　Production process monitoring: industrial RFID readers are set at key production nodes, which can record the process information and process operation information of the whole production process and realize the traceability of production. This is helpful to avoid mistakes caused by handwritten and visual information in production environment and improve product quality and safety.

　　Industrial RFID reader

　　Third, asset management

　　Asset inventory and monitoring: With the long-distance reading and penetrating identification function of UHF reader, it is convenient to inventory and monitor all kinds of assets. Both fixed assets and current assets can be identified and tracked quickly and accurately, and the efficiency and accuracy of asset management can be improved.

　　IV. Other fields

　　Intelligent transportation: In the field of intelligent transportation, such as toll station ETC lane, intelligent parking lot management and other scenes, industrial UHF reader also plays an important role. By quickly identifying RFID tags on vehicles, functions such as fast traffic and automatic fare deduction can be realized, and traffic management efficiency can be improved.

　　Retail and payment: In the retail field, UHF reader can be used to realize unmanned retail and fast payment. Consumers only need to carry goods or payment cards with RFID tags through the reader area to complete the purchase and payment process.

　　V. Technical characteristics

　　Working frequency band: industrial UHF reader generally works in the frequency band of 840-960MHz (there are different standards in different regions of the world), with long reading distance and high data transmission rate.

　　Recognition ability: support multi-tag reading and long recognition distance, and can read RFID electronic tags in batches at a time to improve recognition efficiency.

　　Penetration recognition: it has the function of penetration recognition, and can still be recognized behind paper, wood, cloth, nonmetal and other materials.

　　To sum up, industrial UHF reader has a wide application prospect and important practical value in many fields such as logistics warehousing, manufacturing, asset management and so on. With the continuous development of science and technology and the expansion of application scenarios, its market prospect will be broader.

　　UHF RFID (Ultra-High Frequency Radio Frequency Identification) industrial readers are powerful tools widely used across various industries. They offer reliable and efficient ways to track, manage, and monitor assets, people, and processes. Here’s an overview of some common applications where UHF RFID industrial readers play a crucial role.more importantly, rfid module supplier Made a fighter in the product, not afraid of any competitor’s attack. https://www.vanchrfid.com/

　　1. Supply Chain and Logistics Management

　　In supply chain and logistics operations, UHF RFID readers are essential for tracking goods as they move through different stages of production and distribution. These readers help automate the tracking process, reducing the need for manual scans, minimizing errors, and increasing efficiency. By monitoring the movement of products in real-time, companies can optimize inventory levels, reduce losses, and improve overall supply chain visibility.

　　VI-IR610T UHF RFID Industrial reader

　　2. Warehouse Management

　　Warehouses are often complex environments with a high volume of goods moving in and out. UHF RFID readers are used to manage inventory with greater accuracy and speed. They enable automated identification and tracking of items, making it easier to manage stock levels, locate products, and reduce the time spent on manual inventory checks. This level of automation leads to significant improvements in operational efficiency.

　　3. Asset Tracking and Management

　　UHF RFID readers are commonly used in asset tracking applications across various industries. These readers help companies keep track of valuable assets such as tools, equipment, vehicles, and other resources. By attaching RFID tags to these assets, organizations can monitor their location, status, and usage in real-time. This reduces the risk of loss or theft and ensures that assets are used effectively.

　　4. Manufacturing Process Control

　　In manufacturing environments, UHF RFID readers are used to monitor the production process. They can track the movement of raw materials, work-in-progress items, and finished goods throughout the production line. By integrating UHF RFID readers into the manufacturing process, companies can gain better control over production, ensure quality, and optimize the use of resources.

　　5. Retail and Inventory Management

　　Retailers use UHF RFID readers to manage inventory more effectively and improve the customer experience. These readers enable fast and accurate scanning of products, reducing the time required for stock-taking and ensuring that shelves are always stocked with the right products. UHF RFID technology also supports anti-theft measures by providing real-time tracking of merchandise.

　　6. Access Control and Personnel Tracking

　　In security-sensitive environments, UHF RFID readers are used for access control and personnel tracking. By using RFID badges or tags, organizations can control and monitor who enters and exits different areas within a facility. This enhances security, ensures compliance with regulations, and provides an audit trail of personnel movements.

　　VI-IR610T UHF RFID Industrial reader

　　7. Healthcare and Pharmaceutical Tracking

　　UHF RFID readers are increasingly being used in the healthcare industry for tracking medical equipment, supplies, and pharmaceuticals. This technology helps hospitals and clinics manage their inventory more efficiently, reduce waste, and ensure that critical items are always available when needed. In pharmaceutical applications, UHF RFID readers help track the movement of drugs, ensuring compliance with regulatory requirements and preventing counterfeit products from entering the supply chain.

　　8. Vehicle Tracking and Toll Collection

　　UHF RFID readers are widely used in transportation for vehicle tracking and automated toll collection. RFID tags attached to vehicles enable seamless tracking as they pass through toll booths, reducing the need for manual payments and speeding up the process. This technology is also used for fleet management, enabling companies to monitor the location and status of their vehicles in real-time.

　　Conclusion

　　UHF RFID industrial readers are versatile tools with a wide range of applications across different industries. Their ability to provide real-time data, improve operational efficiency, and enhance security makes them invaluable in modern industrial settings. As RFID technology continues to evolve, we can expect to see even more innovative uses for UHF RFID readers in the future.

　　For more information on UHF RFID industrial readers and their applications, visit VANCH RFID.

　　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.know rfid module supplier Our growth has to go through many hardships, but entrepreneurs are never afraid and boldly move forward. 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!

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　　1. Waterproof

　　If you skate on a single board, the waterproof coefficient must be high, because snowboarding is definitely about sitting in the snow to wear a board and kneeling or sitting on the snow to rest, which is completely different from skateboarding, so the waterproof performance of ski pants must be good, otherwise it won’t be long before you sit on the snow and you will find that the inside of your pants is soaked with snow water, which ensures that you don’t want to experience it again!

　　2. Color

　　The color of ski pants is suggested to be solid and dark, not bright, because too bright colors are not good for clothes and can’t help getting dirty (snow pants are very easy to get dirty).

　　3. Size

　　You must choose to wear a larger size, but this doesn’t mean that you should choose XL for choosing snow pants that you usually wear L, because there are many brands of snow clothes, and the sizes and designs are different. Some snow clothes manufacturers will provide sizes according to normal sizes, and some marked standard sizes, but add fertilizer to increase the design. Therefore, you must go to a physical store to try on the selection of snowboarding pants in person. Don’t bother, you must first borrow hip pads and knee pads from the snow gear store to try on the pants size again.

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　　1 Strong waterproof performance can also be easily dealt with in rainy days.

　　This pair of ski pants is made of special waterproof material, which can effectively prevent moisture infiltration and keep you dry and comfortable in rainy days or snow.

　　Good thermal performance can also be warm as spring in ice and snow.

　　This pair of ski pants contains insulation layer, which can effectively resist the cold and make you feel as warm as spring in the snow and ice.

　　Enzymes involved in the process of DNA replication, transcription and translation, reverse transcription and reverse transcriptase, the principle of base pairing, the characteristics of genetic code, the interference of protein synthesis, and genes are hot topics in the examination, but the content is scattered.As an important brand soul of the company, inhibitors Has outstanding performance, through the market test, still has a strong development trend. https://www.all-chemistry.com/

　　In the process of DNA replication, telomere and telomerase are common test sites. Telomerase is an enzyme composed of RNA and protein. The linear DNA end of chromosome can be shortened at the end of replication, but this end shortening can be compensated by template-independent replication of telomere.

　　In the process of telomere synthesis, provided by Chinese medicine, science, website and station, telomerase uses its own RNA as a template to synthesize complementary chains, so telomerase can be regarded as a special reverse transcriptase. Reverse transcription and reverse transcriptase. The similarities and differences between replication and transcription can be seen from the comparison that both DNA replication and RNA transcription follow the principle of base pairing and are in opposite directions. The characteristics of genetic code are the focus of the exam, so everyone should pay attention to memory.