FAQ
UHF Long range reader

New Products

  • Q: 1)What is the communication protocol for UHF readers

  • A:

    Default reader has wiegand26 output,RS232 or RS485 communication protocol.

    TCP IP  or Wifi can be customized.


  • Q: 2)What's the difference between read-only and read-write tags?

  • A:

    Our UHF-105 and UHF-105 UHF long range reader, it support read-write or read-only. With read-write chips, 

    you can add information to the tag or write over existing information when the tag is within range of a reader, 

    or interrogator. Read-write tags usually have a serial number that can't be written over. 


    Additional blocks of data can be used to store additional information about the items the tag is attached to. 

    Some read-only microchips have information stored on them during the manufacturing process. 


    The information on such chips can never been changed. Other tags can have a serial number written to it once and then that information can't be overwritten later.


  • Q: 3)What is the read range for a typical RFID tag?

  • A:

    The read range of passive tags (tags without batteries) depends on many factors: the frequency of operation, 

    the power of the reader, interference from metal objects or other RF devices. In general, low-frequency tags are 

    read from a foot or less. High frequency tags are read from about three feet and UHF tags are read from 10 to 20 feet. 

    Where longer ranges are needed, such as for tracking railway cars, active tags use batteries to boost read ranges to 300 feet or more


  • Q: 4)How do I know which frequency is right for my application?

  • A:

    Different frequencies have different characteristics that make them more useful for different applications. 


    For instance, low-frequency tags are cheaper than ultra high frequency (UHF) tags, use less power and 

    are better able to penetrate non-metallic substances. They are ideal for scanning objects with high-water content, 

    such as fruit, at close range. UHF frequencies typically offer better range and can transfer data faster. 


    But they use more power and are less likely to pass through materials. And because they tend to be more "directed," 

    they require a clear path between the tag and reader. UHF tags might be better for scanning boxes of goods 

    as they pass through a bay door into a warehouse. It is probably best to work with a consultant, integrator or 

    vendor that can help you choose the right frequency for your application


  • Q: 5) Do all countries use the same low-, high and ultra-high frequencies?

  • A:

    Most countries have assigned the 125 kHz or 134 kHz area of the radio spectrum for low-frequncy systems, 

    and 13.56 MHz is used around the world for high-frequency systems. But UHF RFID systems have only been around since the mid-1990s 

    and countries have not agreed on a single area of the UHF spectrum for RFID. Europe uses 868 MHz for UHF and the U.S. uses 915 MHz. 


    Until recently, Japan did not allow any use of the UHF spectrum for RFID, but it is looking to open up the 960MHz area for RFID. 

    Many other devices use the UHF spectrum, so it will take years for all governments to agree on a single UHF band for RFID. 


    Government's also regulate the power of the readers to limit interference with other devices. Some groups, 

    such as the Global Commerce Initiative, are trying to encourage governments to agree on frequencies and output. 

    Tag and reader makers are also trying to develop systems that can work at more than one frequency, to get around the problem.



  • Q: 6)How to write cards.

  • A:

    Normally if you buy cards from us.the cards have random numbers.

    If you need to write the card with your NEW numbers.then We would offer you RFID demo software.

    and guide you how to write cards,you could also refer to manual.


  • Q: 7)Could your UHF readers be used in any country?

  • A:

    Normally,different country have different frequency regulations.

    Our UHF reader could work from 860mhz to 960mhz.


  • Q: 8 )Are there any health risks associated with RFID and radio waves?

  • A:

    RFID uses the low-end of the electromagnetic spectrum. 

    The waves coming from readers are no more dangerous than the waves coming to your car radio


  • Q: 9)What is the installment angle for UHF reader?

  • A:

    It is best to install at  a 45-degree angle from the horizontal line.

    We suggest you test the detecting effct before installment.


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  S4A-Security For All.  S4A Industrial Co., Limited, Founded in 2010, We have been dedicating in access control production R&D and sales for 10year till now. With the belief that we do one thing well in a lifetime, our CEO has been in this industry for 15 years. During the past 10 years, our products have been exported to various countries and regions. And 90% of customers come from the recommendations of cooperative customers, and 80% of the turnover comes from cooperative customers in the past 10years.Your business is a plant, we are the gardener, our mission is to water and fertilize the plant, and make it become the towering tree. We attach great importance to the partner's appeal, customer's suggestions, and feedbacks. To strengthen Product quality awareness, client's service awareness. Our clients and S4A are on the same path walking for many years.       S4A's future would be even more brilliant, this is related to all of our staff's working sweat. When you join this team, you will feel an invisible power to drive walk forward. S4A mainly produces a series of security Door Access Control such as:Network Access Controller, Locker board, Electromagnetic lock, Standalone door Controller, Automatic door opener, etcOur team can manufacture products, sell products, and do after-sales.We can create value for you! 1-We put quality and price in top priorityQuality takes great importance for a company's credibility, and buyer's every penny spend must worth it. That is our most basic principle. Our business mainly for wholesale, so we could offer large quantities at competitive prices. During the past 10 years, We work hard to create value for our customers, and with our help, customers have an increasing market share. 99% of the customers who have cooperated with S4A will choose 2nd,3rd, and endless purchasing. because S4A not only controls the product quality very well, but the price is also very reasonable. As you can see, we have hundreds of products, but We do not produce all products. We adopt a portfolio strategy and invest in each factory. Because of the large export volume and the stable cooperation relationship with the factory, we can better control the quality and price of the products. Cooperate with us, you have no worries. In the past 10 years, more than 80% of our customers' sales have increased turnover by 15-20% every year. 2 -We have experienced and professional sales Our sales are not just sold products, we also help you choose products, do market research. Our company's top sales team all have more than 8 years of experience in the access control market, our team loves learning, loves sharing, good at summarizing, and dare to undertake responsibility. Because all of us regard the access control field as a career we love throughout our lives. At S4A, you can get a quick response and flexible support, and you can see our ability to solve problems. get professional guidance and recommendations, you don't have to worry about after-sales at all. Our task is: All emails must be replied within 2 hours at a working time!3-We have experienced and professional engineer S4A is equipped with 6 technical engineers for after-sales. and every year, We take out 20% of the net profit as research and development for new products, We all know Access control system is a kind of product with technical knowledge. When you have headaches such as unable to connect wires, Software compatibility issues or programming device, please remember S4A's after-sales support at any time. Our task is: All technical issues must be solved within 4 hours at a working time!4-Support OEM & ODM  All of our products accept OEM and ODM orders at a reasonable quantity. we help customers to promote their brand. We all know Access control is an increasingly popular industry. Based on past experience, we have found that customers who have just started to become distributors do not have a large number, but want to promote their own brands. For this kind of customer, we will also have a special application to do OEM for him. Because Support is mutual.5. S4A Vision Our Vision is to let all people in the whole world free their hands for keys, whether it is in poor areas or developed cities able to use access control.<
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