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    AI Overview
    RFID readers capable of reading multiple tags (anti-collision) via RS232
    typically use UHF (860-960 MHz) for long-range, high-speed inventory tracking, or HF (13.56 MHz) for desktop/short-range applications . These readers send unique IDs through a serial port (DB9) to a computer, with popular options supporting protocols like ISO 18000-6C (EPC Gen2) for UHF.
    Key Considerations for Multiple Tag Reading:
    • Anticollision Protocol: Ensure the reader supports anticollision (e.g., ISO 14443A for HF, EPC Gen2 for UHF) to read multiple tags simultaneously.
    • Reader Types:
      • Fixed UHF Readers: Ideal for portals, conveyors, or inventory, often supporting 4-8 ports for antennas and RS232/Ethernet, like GAOTek's UHF 8-Port Reader .
      • Desktop Readers: Suitable for shorter ranges, such as Cytron's 125KHz RFID Reader with RS232 or HF multi-ISO readers .
    • RS232 Interface: Provides a reliable serial connection (often using a DB9 connector) for transmitting tag data to a PLC, microcontroller, or PC, notes this YouTube video and Cytron.
    • Performance: High-performance systems can read hundreds of tags per second, even near metal or liquids, with ranges exceeding 30 feet using external antennas, as shown in this YouTube video and by Reddit users .
    • Application: Used for asset tracking, inventory management, and vehicle access control, as described by GAO RFID and AliExpress .
    Key Components to Assemble:
    • RFID Reader with RS232
    • Compatible Tags (UHF or HF)
    • Antenna
    • RS232 to USB Converter (if necessary for computer connection)
    Common Suppliers/Technologies:
    • GAO RFID (UHF/HF Readers)
    • SparkFun (Simultaneous UHF Reader)
    • Jietong Technology (2.4G Reader)
    • UHF RFID 8-Port Reader with Multi-Tag Recognition for ...
      UHF RFID 8-Port Reader with Multi-Tag Recognition for Inventory Management - GAOTek - GAO Tek. Home IoT BLE & RFID UHF Readers, Ta...
      GAO Tek
    • RFID solution for reading multiple tags - Electronics Stack Exchange
      Aug 16, 2017 — If you want to detect multiple tags, you need to have a reader with anticollition protocol. I recommend using RFiD HF because the ...
      Electrical Engineering Stack Exchange
    • RFID Reader RS232 - Cytron.io
      Description. This is an easy to use, straight forward RFID tag reader. Come with USB for power and DB9 for sending tag's ID to com...
      Cytron.io
    Show all
    • RFID Reader RS232 - Cytron.io
      Description. This is an easy to use, straight forward RFID tag reader. Come with USB for power and DB9 for sending tag's ID to com...
      Cytron.io
    • Product Showcase: SparkFun Simultaneous RFID Reader
      May 9, 2024 — it's just how your thing can work. too. now this is great for short distance stuff i mean with this at full power we can probably ...
      YouTube · SparkFun Electronics
      2m
    • Multi-Technology RFID Readers
      Some multi-technology RFID readers include: * **High-performance HF desktop reader** Reads up to 50 tags per second * **High-perfo...
      GAO RFID
    • UHF RFID 8-Port Reader with Multi-Tag Recognition for ...
      UHF RFID 8-Port Reader with Multi-Tag Recognition for Inventory Management - GAOTek - GAO Tek. Home IoT BLE & RFID UHF Readers, Ta...
      GAO Tek
    • RFID solution for reading multiple tags - Electronics Stack Exchange
      Aug 16, 2017 — If you want to detect multiple tags, you need to have a reader with anticollition protocol. I recommend using RFiD HF because the ...
      Electrical Engineering Stack Exchange
    • How To Take Multiple RFID Readings Simultaneously #RFID ...
      Oct 23, 2024 — the Sparkf fun simultaneous RFID reader is the best method for tracking your own RFID tags all you have to do is plug the simultan...
      YouTube · SparkFun Electronics
      0:52
    • Rfid Reader Multiple Tags(999+) - Alibaba.com
      Step-by-Step RFID System Assembly * Gather Essential Components. RFID Tags: Acquire passive or active RFID tags depending on your ...
      Alibaba.com
    • RFID Multiple Tags Reading RS232 Interface Reader Suppliers, ...
      RFID Multiple Tags Reading RS232 Interface Reader Suppliers,RFID Multiple Tags Reading RS232 Interface Reader Manufacturers. ... E...
      Shenzhen Jietong Technology Co.,Ltd
    • Does anyone have experience with reading multiple RFID tags at ...
      Oct 2, 2014 — If you have a reader then, you should be already set. If you are trying to do this at HF (13.56 MHz) then this could be more probl...
      Reddit
    • RS232/RS485 Wiegand26/34 TCPIP Relay 6m Range RFID UHF ...
      Introduction：The RFID Automatic Vehicle Identification system uses an RFID reader at the gate to read the passive, vehicle-mounted...
      AliExpress
    • Can RFID Readers Read Multiple Tags? – inLogic Blog
      Absolutely, yes! One of the best features of switching to RFID Fixed Asset tracking is that you can read dozens of tags per second...
      www.inlogic.com
    • Can RFID Tags Be Read by All RFID Readers? - RFID Label
      Sep 20, 2024 — The simple answer is no—not all RFID tags can be read by all RFID readers. Compatibility between RFID readers and tags depends on ...
      www.rfidlabel.com
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    Web results

    Multi-Technology RFID Readers


    GAO RFID
    https://gaorfid.com › RFID Readers by Feature
    GAO RFID
    https://gaorfid.com › RFID Readers by Feature
    High-performance four-channel fixed UHF reader /writer w/ Built-in RS-232 and RJ45 Ethernet interfaces , Versatile I/O ports, such as Digital Inputs, Dry contact ... Read more
    Discussions and forums
    Hardware question - Reading Multiple RFID tags at once
    Reddit ·
    r/RFID
    · 4 comments
    · 1 year ago
    Hardware question - Reading Multiple RFID tags at once
    Reddit ·
    r/RFID
    · 4 comments
    · 1 year ago
    Reader that implements anti-collision in certain ways will allow you to read multiple tags but NFC is designed with short distance in mind. More
    How to make SIEMENS read two RFID tags simultaneously?
    Reddit ·
    r/PLC
    · 5 comments
    · 1 year ago
    How to make SIEMENS read two RFID tags simultaneously?
    Reddit ·
    r/PLC
    · 5 comments
    · 1 year ago
    Start by reading the manual! More
    Top answer · 52 votes · a year ago
    It's not a Siemens issue. It's more a Sick issue. At first read the manual for configuration ... More
    13 votes · a year ago
    If the Sick scanner is anything like Cognex Dataman (long shot here), then it sends the data ... More
    4 votes · a year ago
    Multiple Serial Ports with RFID readers - General Guidance
    Arduino Forum ·
    3 years ago
    Multiple Serial Ports with RFID readers - General Guidance
    Arduino Forum ·
    3 years ago
    So for my setup I have four Arduino Unos which each read a tag through a reader and output either '0', '1', '2' or '3' t... More
    See more

    Web results

    UHF RFID 8-Port Reader with Multi-Tag Recognition ...


    GAO Tek
    https://gaotek.com › product › uhf-rfid-8-port-reader-w...
    GAO Tek
    https://gaotek.com › product › uhf-rfid-8-port-reader-w...
    UHF RFID reader offers high speed, multi tag recognition and long read range ... RS232 Interface , Baud rate 115200 bps(default). Ethernet Interface, 10 M or ... Read more

    RFID Multiple Tags Reading RS232 Interface Reader ...


    Shenzhen Jietong Technology Co.,Ltd
    https://www.jtspeedwork.com › rfid-multiple-tags-readi...
    Shenzhen Jietong Technology Co.,Ltd
    https://www.jtspeedwork.com › rfid-multiple-tags-readi...
    Multiple tags reading ; Antenna gain 12dBi; Reading range: 0-30m Difference between JT-8290 and JT-9292: Model Main Chip Reading Performance JT-8290 Discrete ... Read more

    TR-100 RFID Reader Module (USB & TTL or RS232) - Thinkify


    thinkifyit.com
    https://thinkifyit.com › products › tr-100-rfid-reader-mo...
    thinkifyit.com
    https://thinkifyit.com › products › tr-100-rfid-reader-mo...
    A diverse set of interface options enables greater flexibility in building your solution: Multiple communication interfaces: RS232 or TTL (x2) and USB 2.0 ... Read more
    $465.00

    Simultaneous RFID Tag Reader Hookup Guide


    SparkFun Electronics
    https://learn.sparkfun.com › tutorials › simultaneous-rfi...
    SparkFun Electronics
    https://learn.sparkfun.com › tutorials › simultaneous-rfi...
    The greatest feature is that the SRTR is able to read multiple tags at the same time . Additionally the read distance of tags is greatly increased (up to 16 ... Read more
    Missing: RS232 ‎| Show results with: RS232

    E Series 9 dbi Long Range UHF RFID Reader RJ45 WG ...


    Amazon.com
    https://www.amazon.com › Geenfc-Range-Reader-RS23...
    Amazon.com
    https://www.amazon.com › Geenfc-Range-Reader-RS23...
    RJ45, RS232 , RS485, WG, TTL interface , 100 tag / second inventory speed ... Inventory Speed: M100: 100 tags /second ( recommend not exceed 20 tags reading ... Read more

    RS232 RFID Readers


    GlobalSpec
    http://www.globalspec.com › areaspec › interface_rs232
    GlobalSpec
    http://www.globalspec.com › areaspec › interface_rs232
    A non-contact high frequency RFID reader , specially designed for use in embedded applications such as address reading or proximity control of AGV and other ... Read more

    RFID Reader RS232


    Cytron.io
    https://www.cytron.io › ... › Bluetooth & RF › RFID
    Cytron.io
    https://www.cytron.io › ... › Bluetooth & RF › RFID
    This is an easy to use, straight forward RFID tag reader . Come with USB for power and DB9 for sending tag's ID to computer through RS232. Read more
    5.0 (4)
    Missing: multiple ‎| Show results with: multiple

    Multi-Protocol RFID Readers


    GAO RFID
    https://gaorfid.com › RFID Readers by Feature
    GAO RFID
    https://gaorfid.com › RFID Readers by Feature
    Long-range UHF RFID reader with 9dBi antenna, RS232 , RS485, TCP/IP, POE, USB, and WIFI. Supports ISO 18000-6C/6B, ideal for parking, retail, and asset tracking. Read more

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