OPPIOT produce and research in UHF ceramic tags and RFID special tags

Ceramic RFID Taghttp://www.oppiot.com/ceramic-rfid-tags.html

The material ceramic is good conductive electricity and high temperature resistant and good stabilty ,so the ceramic tags can be applied to metal surfaces directly and industrial environments and so on ,our ceramic tags support long distance reading in small size , this tags can be suitable in many harsh condition ,such as IT asset management, mold management, gun weapon management, network and communication facilities and tools management, equipment parts management, surgical instrumentation tracking ,medical equipment status and utilization and cable identification and so on

There have 16 size list for choices in our company now ,from the smallest size to large size .and various form shape such as small rice shape and round circle shape and rectangle shape and so on ,also can do customize tags as you request .the longest reading distance is 10Meters in size 30*30mm

See The special smallest size of our Ceramic tags 4*4*3mm as follow :

Chip:Alien H3 ,EPC 96bits , USER 512bits, TID 64bits Read/write
Data Retention:50years
Reading at 0.8mters on metal surface
Mounting method:adhesive
IP Rating:IP68
Storage Temperature:-40°С to +150°С
Operation Temperature:-40°С to +85°С

More info view


Ceramic RFID Tags 5x5x3mm

ceramic rfid tags
ceramic rfid tags

When it comes to small size RFID tag, how little size you will think of?
We are glad to tell you that we can custom the size as smaller as your need.
There is a complete solution according to the requirements of your project.
Here I would like to introduce our one special type of small size ceramic RFID for your reference.
The followings are the major date sheet of it.
1. Material. It’s made of ceramic with outer painting, has very strong resistance to high temperature up to 150°С without damage.
2. Read distance. You may question such small size can read how far? The read distance can be 1 meter.
3. Mounting method. The most often seen way is by adhesive with 3M glue.
4. Working surface: metal surface
5. Application environment. With good performance and IP68 rate, it can be used outdoor no matter how harsh the environemnt is.
6. Application field: it is designed for industrial projects, can be applied many indutries, like car painting, bakery, iron and so on.
If you are handling a project asking for high temperature and good read range with small size, our 5x5x3mm ceramic tag will be a good option.

More info view http://www.oppiot.com/ceramic-rfid-tags.html

Why use RFID Asset Tracking tags?

Advantages of using RFID asset tracking tags
* Increase inventory efficiency
* Save time and reduce errors with real-time inventory visibility.
* Optimize order picking efficiency and inventory placement.
* Track assets such as Returnable Containers.
* Boost revenue and output
* Track WIP and deploy resources in real-time to increase output and revenue.
* Instantly locate mission-critical equipment and tools when they are needed.
* Drastically reduce loss
* Never misplace equipment or inventory.
* Eliminate theft with scheduled motion alarm detection.
* Easily add Perimeter Security.
* Detect the presence of Inventory and Returnable Containers at Third-Party Manufacturers.

Passive UHF Metal Tag OPP4215


The OPPIOT technology team, according to the market need ,Concentrated on design,develop ,Manufacture of this tag OPP4215 with Size 42×15 mm  with Protocal EPC Class1 Gen2,ISO18000-6C.Frequency :(US)902-928Mhz ,(EU)865-868Mhz, The reading distance can reach 7M on metal surface by fix reader ,which can be used in many applications, for example: outdoor use, for metal labeling. which can be used under harsh Environment,Such as can stand  280°С for 50 minutes, 250°С for 150 minutes .Our tag OPP4215 Our tag uses electromagnetic fields to automatically identify and track tags attached with objects,which can be an outstanding choice when performance and stability are crucial.The tags contain electronically-stored information,which is Passive tags collect energy from a nearby RFID reader’s interrogating radio waves.And our tag OPP4215 has  passed ROHS and CE certificate , ATEX Explosion-proof Certification,ISO9001 Quality Management System and ISO14001 Environmental Management standards.We have our own production line,We offer OEM / ODM service.

What are Passive UHF Tags?

Passive UHF tags have no internal power supply. The minute electrical current induced in the antenna by the incoming radio frequency signal provides just enough power for the IC in the tag to power up and transmit a response. Most passive tags signal by backscattering the carrier wave from the reader. This means that the antenna has to be designed both to collect power from the incoming signal and also to transmit the outbound backscatter signal. The response of a passive RFID tag is not necessarily just an ID number; the tag chip can contain non-volatile, possibly writable EEPROM for storing data.

Passive tags have practical read distances ranging from about 10 cm (4 in.) up to a few meters (EPC) and (ISO 18000-6 ), depending on the chosen radio frequency and antenna design/size. Due to their simplicity in design they are also suitable for manufacture with a printing process for the antennas. The lack of an onboard power supply means that the device can be quite small: commercially available products exist that can be embedded in a sticker, or under the skin in the case of low frequency RFID tags.


MIFARE 1K was originally designed with 4 byte unique identity code, also called UID code, if we keep each chip code unique, there are only 4.2 billion codes in total. But as MIFARE 1K has been so popular and widely used, this capacity is obviously not enough to satisfying the continuously growing demand. So the MIFARE 1K card with 7 byte UID code appeared.

As the MIFARE 1K chip code varies so much, sometimes, the MIFARE 1K cards from different factories is not compatible with all the MIFARE readers in the market, there are two reasons for this phenomenon:

1, the classic 4-byte UID MIFARE 1K cards only need one cascade of anti-collision to select the card, but 7-byte UID MIFARE 1K cards needs two cascades of anti-collision to select the card. The MIFARE card with 4-byte UID doesn’t need the second cascade of anti-collision, if the reader is designed with two cascades of anti-collision, it can cause error.

2, in card authentication stage, it needs 4-byte UID code, 6-byte card password, and 1-byte data to participate in. But the new card has 7-byte UID code, how to decide which 4 bytes to participate in the authentication stage? There are 3 solutions presently, 1), 88h and the first 3 bytes of the UID, 2), the first 4 bytes of the UID, 3, the last 4 bytes of the UID, to participate in the authentication stage.

So, if your reader can not read card with 7 byte UID, you can consider from the above two aspects: whether it needs the second cascade of anti-collision in card selecting step, and which 4 byte participate in the authentication step.

UHF scanner Type

A UHF scanner is a handheld, mountable, or desktop device that receives a wide range of UHF transmission frequencies. These receivers often permit easy push-button access and automatic tuning across the band, allowing users to listen in and keep abreast of local events. Units can differ by size, scanning methods, and internal technology.

The ultra high frequency (UHF) band is a portion of the electromagnetic (EM) spectrum typically reserved for radio communication of public agencies. These can include ambulance, police, and fire transmissions. It is also used by air and amateur radio services.

Scanners come in three basic configurations: handheld, mobile, and desktop designs. Handheld units resemble walkie-talkies, which are portable for field use. Mobile units mount on dashboards or with detachable control heads and can be connected to one or more vehicle-mounted antennas. Desktop varieties can be hooked to larger base-station antennas to increase range. A UHF scanner can pick up radio transmissions from mobile and base stations, repeaters, control stations, and more.

Some types of UHF scanner can serve either as as base station or mobile unit. These typically possess an external antenna. Such devices not only scan preprogrammable channels, but are able to detect nearby transmissions and automatically zero in on their frequencies. This functionality affords access to a broad variety of UHF transmissions, from 300 megahertz (MHz) to 3 gigahertz (GHz) and beyond. These units may offer hundreds of channels, programmable memories, and frequency skipping.

Internally, three types of UHF scanner can be found. Older models rely on single-frequency crystal technology; these radios typically do not have keypads, and cannot follow today’s trunked radio transmissions. Conventional programmable radios use integrated circuits for tuning more frequency ranges at higher speeds. Trunk tracking programmable systems permit automatic group tuning; transmissions shift frequencies and usually require a dedicated trunking scanner to track conversations across a portion of the band.

Various scanners are combined with Citizens Band (CB) radios and speaker mics for transmitting on 40 channels. Marine radios may be splash proof, and others are outfitted with rugged cases for tough outdoor conditions. Some handheld types combine UHF scanning with very high frequency (VHF) bands to extend capability. Others are capable of hands-free operation, voice scrambling functions, and CTCSS — a continuous tone coded squelch system, which allows listening only to particular senders on a channel.

A UHF scanner legally permits listening to many types of official transmissions. Private telephone or pager transmissions, however, are protected by law, and should not be intentionally intercepted. Scanners may come with accessories such as headphones, cradles, or clip-on antenna mounts, as well as a wide variety of antenna types, from magnetic-mounting to telescoping whips. Others may come with chargers, batteries, or adapters.

RFID Applications

RFID technology is used in a number of industries to carry out various tasks such as:
*Asset tracking
*Inventory management
*Controlling access to confined areas
Personnel tracking
*Supply chain management
*ID badging
*Counterfeit forestalling (e.g., in the pharmaceutical industry)

Even though RFID technology has been in used by humans ever since from World War II, the stipulate for RFID devices is rising quickly, in fact owing to orders given by the U.S. DoD (Department of Defense ) and Wal-Mart needing their suppliers to modify products to be traced by RFID technology.

RFID is also employed in a number of other things:
*The keys to unlock your car door;
*The automatic deduction of payment while using toll booths;
*Building access systems;
*Payment cards, student ID cards and even Passports
*Wireless sensors & mesh networks.
Whether RFID technology submissiveness is necessary, applications that at present make use of bar code technology are excellent options for upgrading them to a technology that brings into play RFID or some admixture of the two technologies. RFID proffers a number of advantages in contrast to the bar code, precisely the fact is that an RFID tag can store more amount of data about a particular product than a bar code can. Additionally, RFID tags are not exposed to the afflictions that may happen with bar code labels, such as breaking and blackening.

How to Improve RFID Reader Ranges?

Your RFID reader is connected to your antennas, you’ve adjusted your power settings, and you’ve applied your RFID tags to the items you want to track;
however you’re having trouble reading your tags. Well, you’re in luck because this post will help you troubleshoot some of the common RFID read range
pitfalls. Before delving into the topic, the importance of testing cannot be stressed enough. Regardless of what is stated here, you should always
thoroughly test, make any necessary adjustments, and then retest.

Some hardware is designed for maximizing read range, while other hardware is designed to limit read range. It is important that you have the appropriate
hardware in place for your application. The following six tips walk you through key hardware specifications that will assist you in determining your
optimum setup.

Antenna Gain:
If you need more read range, use higher gain antennas. If you need less read range, use lower gain antennas. If you need to read tags up close, use very
low gain proximity antennas.

Antenna Polarization:
If tags are aligned with the antenna’s polarization, linear polarized antennas will read farther than circular polarized antennas. If tags are not
aligned with the antenna’s polarization, then circular polarized antennas will read farther than linear polarized antennas.


As a general rule of thumb, small tags will have shorter read ranges, and large tags will have longer read ranges. In order to get the best range from
any RFID tag, make sure that the tag is fully facing the antenna and pay particular attention to tag orientation when using linearly polarized antennas.
Lastly, when tagging objects with high liquid or high metallic content, be sure to choose RFID tags designed for mounting on such objects.

Reader Settings:
Higher power settings will result in greater read range, while lower power settings will result in decreased read range. Also, in order to maximize read
range, ensure that your reader is set to its highest receive sensitivity.

Cable Length, Multiplexers, and Adapters:
The longer the cable, the higher the loss and using adapters and/or multiplexers inserts additional loss into your RFID system. For maximum read range,
connect the antenna to the reader with the shortest cables you can get away with and don’t use unnecessary adapters or multiplexers. If you must use
longer cables, be sure to offset the loss with a higher rated insulated cable.

Environmental Factors:
MANY environmental factors can affect read range. When attempting to maximize read range, be sure to account for various types of interference and test,test, test!

NXP Mifare 1k s50 chips

NXP mifare 1k chips, which worked at high frequency of 13.56 Mhz whipped up a thunderstorm.

It was no longer merely bear UID code or passwords, it extended the multiple functions, up to 1kB memory organized in 16 independent sectors, each sectors could sets an application and its passwords.

It is amazing function, which make multiple applications in one card possible, beside it contains a logical counter, which allows it able to conduct plus and deduct algorisms.

It was so popular as if all the RFID cards bear this Mifare 1k chip in one night. It is still the most welcome chip in the market.