RFID Tagging is the placing of tags onto assets to enable those assets to be managed.

For RFID enabled items like access cards or an Oyster card for example, the RFID tagging process is part of the manufacturing process. It would not be classed as RFID tagging.

For items that are‘tagged at source’, again this would not really be what the industry classes as RFID Tagging. When something is manufactured there are often many labels attached during the process, if that manufacturer puts an RFID tag on the item or packaging it is part of the overall process, classed as source tagging.

RFID Tagging really refers to the retrospective tagging of assets, many different types of assets.

Those assets could be library books, power tools, IT equipment, files, patient records, they are all classed as assets.

The process of RFID Tagging means that these assets have a tag placed on them, usually the tag has an adhesive back, then some reference to the item is programmed onto the RFID tags microchip.

Not all tags have adhesive on the back, it depends what they are meant to be attached to.

Once the asset has a tag attached it can be read by an‘RFID Reader’. Usually there are some security features built in so only the desired RFID Reader can get data from the tags.

OPP IOT FR4 On Metal RFID Tags

OPP IOT (On Metal) RFID Tags are a group of UHF tags designed to work in a metal environment or applied to a metal surface. OPP IOT RFID Tags can be used to track many kinds of metal assets including plant & machinery,pipelines,IT & Telecom,pallets etc. They allow data to be written to and read from chips in environments that are unfavorable for radio communication. The design and technology of the compact RFID antennas are particularly insensitive to radio interference resulting from scattering and reflection effects produced by metallic objects. They can be fixed to the object permanently for continuous use. Multiple OPP IOT RFID Tags can be fixed by riveting,screwing or gluing as required for different applications.

All the OPP IOT UHF RFID tags designs we show resulted from a project we have completed before with our experience in RFID technology. Please consult to us for finding the right design to meet your requirements.

Key Features:
– Smooth Surface, Hard Structure
– Good performance with Directly Attached on Metal
– Firmly Stracture
– High Temperature Resistance and waterproof
– Wide Adaptability for Metal, Especially in Harsh Environment

FR4 On Metal Tag Universal Spec.:
– Material:FR-4, PCB, Double Side Copper Etching Antenna
– Working Frequency: UHF 860 ~ 960MHz EPC Global
– IP Rating: IP68
– Operating Temperature: -40 ℃ ~ 100 ℃
– Storage Temperature: -40 ℃ ~ 150 ℃
– Installation: Screw Fixing, Adhesive
– Coding: Available
– Customized Logo Printing: Spray paint, Silk Screen Printing, LaserLogo Printing

– Industrial Inventory Managerment
– Property Tracking
– Item Identification
– Patrol System
– Forklift, Trunk, Vehicle Management
– Stree Light, Traffic Light and Other Pubilic Management

If you are looking for a specific OPP IOT (On Metal) RFID UHF Tags and you cannot locate it on our website, please contact us via email or phone to discuss your requirements.

For further details,please email: info@oppiot.com

UHF tags from OPP IOT

OPP IOT focused on the UHF tags for 10 years and offers a range of solutions based on customization projects.

OPP IOT, a leader in track-and-trace capabilities, produces advanced UHF RFID tags and components essential to optimizing automated asset tracking and logistics systems.

OPP IOT UHF RFID Tracking Tags help ensure seamless traceability and reduce losses, while enhancing stock management and processing speed.

Passive contactless UHF RFID tags from OPP IOT improve data collection speed and accuracy, making tracking more cost-effective while increasing accuracy.

OPP IOT offers UHF tags with a broad selection of form factors, chip configurations and memory capacities.

Small UHF RFID Tag OPPD5 Improves the Efficiency of Management and Heightens the Security in Many Applications

In the real time information society, the Small UHF RFID tag, a newly high technology of RFID, is a very popular technology in a variety of industries, such as the logistic and the tourism. However, reliable identification of multiple objects is especially challenging if many objects present at the same time, so the bar code has not met the requirement of the market. Fortunately, as a professional RFID product manufacturer, OPP IOT, has released a series of the fire-new small UHF RFID tag for the consumer’s need, which is one of the most experienced and high quality suppliers of RFID in the industry.

As the technology of RFID developing, the small UHF RFID tag has brought the huge profit to the business, which can optimize business processes and preferably serve more customers. For example, UHF Metal Tag-OPPD5, a fire-new RFID product released by OPP IOT, is a perfect choice in applications which require tags to be applied in metallic environment. Besides, thanks to the special material and design of small UHF RFID tag, it can be widely used in various industries and harsh environment. Last but not least, confirming to EPC Class 1 Gen 2, it shows unsurpassed UHF performance reliable operation in dense reader environment and long read ranges. In addition, the size of small UHF RFID tag enough to be embedded into small item for tracking usage, such as it can improve the efficiency of management and heighten the security in asset tracking applications.

In the information ages, the small UHF RFID tag with the high performance and low cost help the organizations across industries all over the world address many issues by the advance technology. And with the power of RFID, there will be fewer errors, increased automation and the low cost with the labor pool since the latest small UHF RFID tag with the top technology has been widely used in many places. Overall, it can believe that the technology of RFID will be regarded as one of newly top technology in the near future.

Everest series UHF tags for industrial markets and health care line

High temperature UHF tags for industrial
High temperature UHF tags for industrial

OPP IOT launched a series of high temperature UHF On-metal tags for industrial markets and health care line.

The high temperature series RFID tags are specially designed as the most rugged On-metal RFID tags in the world for harsh application environment.

Except featuring On-metal usage and a new anti-UV industry grade polymer casing and IP68 Ingress Protection rating for outdoor applications, it could withstand long term super high temp 150℃.

The Everest series of tags are with flexible installation, such as rivets, screws fixed, or two-side glue, super glue etc. Also we recommend the brand high temperature glue to work with the tag for your harsh solutions.

This series of UHF on-metal RFID tags reliability test include: high temperature and high pressure test, high and low temperature alternating test, The high level of durability improves RFID tag lifetime of up to 10 years, even for harsh industrial environments and we see an even greater return on investment.


The UHF EPCglobal Generation 2 standard allows the commercialized provision of mass adoption of UHF RFID technology for passive smart tags and labels. Main fields of applications are supply chain management and logistics for worldwide use with special consideration of European, US and Chinese frequencies to ensure that operating distances of several meters can be realized.
The G2X is a dedicated chip for passive, intelligent tags and labels supporting the EPCglobal Class 1 Generation 2 UHF RFID standard. It is especially suited for applications where operating distances of several meters and high anti-collision rates are required.

The G2X is a product out of the NXP Semiconductors UCODE product family. The entire UCODE product family offers anti-collision and collision arbitration functionality. This allows a reader to simultaneously operate multiple labels/tags within its antenna field. A UCODE G2X based label/ tag requires no external power supply.

Its contact-less interface generates the power supply via the antenna circuit by propagative energy transmission from the interrogator (reader), while the system clock is generated by an on-chip oscillator. Data transmitted from interrogator to label/tag is demodulated by the interface, and it also modulates the interrogator’s electromagnetic field for data transmission from label/tag to interrogator.

A label/tag can be operated without the need for line of sight or battery, as long as it is connected to a dedicated antenna for the targeted frequency range. When the label/tag is within the interrogator’s operating range, the high-speed wireless interface allows data transmission in both directions.

In addition to the EPC specifications the G2X offers an integrated EAS (Electronic Article Surveillance) feature and read protection of the memory content. On top of the specification of the G2XL the G2XM offers 512-bit of user memory.

UCODE G2XM G2XL Key features
512-bit user memory (G2XM only)
240-bit of EPC memory
64-bit tag identifier (TID) including 32-bit unique serial number
Memory read protection
EAS (Electronic Article Surveillance) command
Calibrate command
32-bit kill password to permanently disable the tag
32-bit access password to allow a transition into the secured transmission state
Broad international operating frequency: from 840 MHz to 960 MHz
Long read/write ranges due to extremely low power design
Reliable operation of multiple tags due to advanced anti-collision
Forward link: 40-160 kbit/s
Return link: 40-640 kbit/s

UCODE G2XM G2XL Key benefits
High sensitivity provides long read range
Low Q-factor for consistent performance on different materials
Improved interference suppression for reliable operation in multi-reader environment
Large input capacitance for ease of assembly and high assembly yield
Highly advanced anti-collision resulting in highest identification speed
Reliable and robust RFID technology suitable for dense reader and noisy environments
Custom commands
EAS Alarm
Enables the UHF RFID tag to be used as EAS tag without the need for a backend data base.
Read Protect
Protects all memory content including CRC16 from unauthorized reading.
Activates permanent back-scatter in order to evaluate the tag-to-reader performance.
Supply chain management Item level tagging
Item level tagging
Asset management
Container identification
Pallet and case tracking
Product authentication
Outside above mentioned applications, please contact NXP Semiconductors for support.

Types of Memory in RFID Tags

Gen 2 RFID tags are comprised of an antenna and a chip (more accurately called an integrated circuit, or IC). The ICs for Gen 2 tags contain four types of memory:
* Reserved memory
* EPC memory
* TID memory
* User memory

When starting your application and selecting a tag, in order to know about how much memory is on each tag’s IC, you can check the specifications page on each tag’s data sheet. To learn the properties of each memory bank, we have outlined them below:

Reserved Memory:
This memory bank stores the kill password and the access password (each are 32 bits). The kill password permanently disables the tag (very rarely used), and the access password is set to lock and unlock the tag’s write capabilities. This memory bank is only writable if you want to specify a certain password. Most users do not use this memory area unless their applications contain sensitive data. It cannot store information besides the two codes.

EPC Memory:
This memory bank stores the EPC code, or the Electronic Product Code. It has a minimum of 96 bits of writable memory. The EPC memory is what is typically used in most applications if they only need 96 bits of memory. There are some tags that have the capability of allocating more bits to the EPC memory from the user memory. EPC memory is your first writable memory bank.

TID Memory:
This memory is used only to store the unique tag ID number by the manufacturer when the IC is manufactured. Typically, this memory portion cannot be changed.

User Memory:
If the user needs more memory than the EPC section has available, certain ICs have extended user memory which can store more information. When it comes to user memory, there is no standard in how many bits of memory are writable on each tag. Typically, the extended memory is no more than 512 bits, but there are some high memory tags with up to 4K or 8K bytes of memory. This is the second writable memory bank for Gen 2 ICs.

UHF RFID Tag IC-Alien Higgs-3

Higgs-3 is a highly integrated single chip UHF RFID Tag IC. The chip conforms to the EPCglobal Class 1 Gen 2 specifications and provides state-of-the-art performance for a broad range of UHF RFID tagging applications.

Higgs-3 is a highly integrated single chip UHF RFID Tag IC. The chip conforms to the EPCglobal Class 1 Gen 2 specifications and provides state-of-the-art performance for a broad range of UHF RFID tagging applications.

Higgs-3 operates at extremely low power levels yet still provides sufficient backscatter signal to read tags at extended range. It can also be programmed at low RF power and, in conjunction with a custom command – LoadImage – be programmed at high speed. Higgs-3 is implemented in a low cost CMOS process and uses proven and cost effective EEPROM technology.

Higgs-3 offers a flexible memory architecture that provides for the optimum allocation of EPC and User memory for different use cases such as legacy part numbering systems and service history. User memory can also be read and or write locked on 64-bit boundaries, supporting a variety of of public/private usage models.

The IC also features a factory programmed 64-bit serial number that cannot be altered. In conjunction with the EPC code, this provides a unique “fingerprint” for the tagged item.

Alien Higgs-3 RFID IC Features
* Meets EPCglobal Gen2 (V 1.2.0) as well as ISO/IEC 18000-6C
* Worldwide operation in the RFID UHF bands (860-960 MHz)
* 800-Bits of Nonvolatile Memory
– 96-EPC Bits, extensible to 480 Bits
– 512 User Bits
– 64 Bit Unique TID
– 32 Bit Access and 32 bit Kill Passwords
* Pre-Programmed with a unique, unalterable 64-bit serial number
* User Memory can be Block Perma-Locked as well as read password protected in 64 Bit Blocks
* Supports all Mandatory and Optional Commands including Item Level Commands
* Custom Commands for high speed programming; 30 tags per second for the 96-bit EPC number
* Low power operation for both read and program
* Exceptional operating range, up to 10m with appropriate antenna

Alien Higgs-3 RFID IC Applications
* Supply Chain Management
* Distribution Logistics
* Product Authentication
* Asset Inventory and Tracking
* Baggage Handling and Tracking
* Item Level Tagging

What RFID frequency is right for me?

RFID cards and key tags come in three frequencies: low frequency, high frequency and ultra-high frequency. The main differences have to do with the reading distance between the reader and the card or key tag.

Technology options:
Low Frequency (LF) – 125 kHz
Also known as: Prox, HID, Clamshell
Read range: 1”-2”
High Frequency (HF) – 13.56 MHz
Also known as: MiFare, i-Class, NFC
Reader range: 2”– 5”
Ultra High Frequency (UHF) – 900 MHz
Read range: 2” to 30’

When looking for cards you should start with the specification of the reader that the cards or key tags will work with. If you have the flexibility to choose a reader then you can select the card and reader frequency that is right for your environment.