RFID Theory

The RFID system typically consists of a tag made up of a microchip with an antenna, and an interrogator (reader), which is embedded with a single chip processor and an antenna.
The purpose of an RFID system is to enable data to be transmitted by a tag, which is read by an RFID reader and processed according to the needs of an application. Moreover, the data transmitted by the tag may provide identification or location information, or specifics about the product, for example, price, color, date code, etc. Also, RFID systems can be employed for tracking objects- as an invasion of privacy.

In short, RFID tags can carry data and serve as data transfer agents; a reader in range of the tag’s signal will receive the data, decrypt it, and forward it to the host computer for stores all collected data within a database.

What is RFID Reader?

Basic function of the RFID reader is to converse with the RFID tag by originating radio waves from its antenna.
The RFID readers are classified on their variety, such as Microwave frequency, UHF (Ultra-high frequency), HF (High frequency) and LF (Low frequency) that are 5.8 GHz to 125 KHz. There costs are also reliant on their range; Microwave frequency readers are costliest, LF readers are the cheapest.

Mainly, there are two types of RFID reader: handhold and fixed.

Handhold Type Reader

The Handheld reader fits comfortably in the palm of your hand. Users carry this portable Reader while looking for specific items such as merchandise, inventory, or other assets.
The Handheld reader not only can be used to manually scan but also program individual tags. Instead of reading all tags in an area at one time, users can selectively read and program only particular items.

Fixed Type Reader

The fixed reader is an RFID interrogator mounted to a permanent or non-mobile structure enabling users to read RFID tag numbers attached to movable items.

Benefits and Characteristics of RFID

Nowadays, RFID is already having a significant impact on many businesses.
RFID can deliver benefits in many areas from tracking work in progress to speeding up throughput in a warehouse and so on.

Here is the list of RFID benefits and features.
* RFID (Tag) can be read from a distance and from any orientation
* RFID(Tag) do not require line of sight to read
* RFID (Tag) have both read and write capabilities
* RFID (Tag) Can provide large amounts of data
* RFID (Tag) can be embedded easily into different objects
* RFID (Tag) can read at rapid rates- at a speed of up to 1,000 tags per second
* RFID (Tag) can be read in harsh environments where operating temperatures range from 22 degree Fahrenheit to +159 degree Fahrenheit
* RFID (Tag) is costly but efficient
* RFID (Tag) do not get damaged easily
* RFID system offers permanent identification- tags encrypt information with unique identification
* RFID reduces administrative error, labor costs associated with scanning, reading and shipping
* RFID improves businesses and guarantee traceability
* RFID can help to improve the forecasting

Why Choose a Passive RFID Tag?

A passive RFID tag is normally used in applications such as access control, item tracking, race timing, supply chain management, logistics, ticketing, cashless payments and more. The low price point per tag makes passive RFID tags economical and the short to medium read ranges are well-suited to applications where you need to read one RFID tag at a time rather than many tags at once.

Because passive RFID tags have no battery, the tag form factor tends to be smaller and inexpensive to deploy. Passive RFID tags also come in many different form factors, from RFID bracelets and key fobs to RFID smart labels and cable tags. The various sizes and form factors lend themselves to a range of RFID applications and the lack of battery means that the tags can operate for many years without the need for battery replacements or other staff support.

Despite its many advantages, you should also consider some of these disadvantages when choosing a passive RFID tag:

Passive RFID tags can be read at short distances, typically 6 cm to 30 cm. This creates reading limits for certain types of RFID applications.
Improper RFID tag antenna orientation towards the reader in some types of passive RFID tag applications can result in unstable reads.
Limited memory for data storage.
Reading through liquid or metal can be difficult for some types of passive RFID tags.

Typical Applications for Passive RFID Tags:
Consumer Goods Tracking
Small Item & Asset tracking
Ticketing & Payments
Vehicle Identification
Inventory Management
Access Control Applications
Rapid Transit Ticketing
Supply chain management
Work-in-process Tracking
Production Line Management
Race Timing Applications
Parking Lot Access Control
Festivals and Marketing Events

What is the Distance/Range of RFID Tags?

RFID reading distance depends on several factors including:
* Size of the tag’s antenna
* Tag chip
* Tags orientation in the reader field
* Strength of the reader field
* Environmental factors like metal, water or other material around the tag
* LF, HF and UHF near-field tags typically have a reading distance of ~1 ft (30 cm).
* UHF far-field tags typically have a reading distance of several m/ft but are strongly dependent on the environment.
* NFC Tags (HF) are designed for near-field communication with a smartphone or similar device and typically have a reading distance of ~1 in (2 cm).

More info view http://www.oppiot.com

Five Most Common Field Questions for Read-on Metal RFID Tags

• What metal tags would you recommend?
There are many different considerations for choosing the appropriate tag for an application. Sometimes it comes down to the best price or the physical size and the form factor of the tag; but often it is the read range or the tag material, mounting material, attachment method and surrounding atmosphere (including the presence of metal, humidity, current, etc.) that affects the durability and the performance.

• Why is the read range of the tag different from lab tests?
Sometimes RFID tags are modified for use in the rugged environment, by adding a protective coating or using spacers so the tag isn’t mounted directly on metal. These measures can significantly reduce performance for tags that were not designed to be attached this way.

Very often, the read range of the RFID tag is reduced due to frequency detuning, especially when the tag is embedded or used in a metal rich environment. Non-optimized tags may work sometimes, but consistent performance requires an optimized product.

• How can the item be tagged?
Sometimes the RFID tag itself can perform fine in harsh environment, but the biggest challenge is keeping it attached to the item. A metal tag may withstand high temperatures or immersion in liquid, but its adhesive may not. Ideally, an RFID tag will be embedded within the item it is identifying, which provides maximum protection against impact and exposure. Embedding isn’t always practical.

Adhesive is one of the more common ways to attach a tag to an item. Choosing the right adhesive requires an understanding of the complete environment, not just the working conditions. Extreme cold can also affect adhesives and can make tags brittle, so consider storage and processing temperatures when specifying tags. Adhesives however won’t work for all environments and materials, so tags may need other attachment options such as screws or rivets, string ties or epoxy.

• What potential sources of interference are in the environment?
Just because a tag is not applied to a metal object doesn’t mean it does not need to resist interference from metal. Tagged objects may be placed in metal carts or racks, or moved to areas where there is a lot of metal. Carefully consider all the areas where a tagged object will be used or may need to be read so you can select a model that will provide reliable performance.

• Can a high temperature RFID tag meet different high temperature applications?
In general, no. High temperature RFID tags are subject to different use applications. For example, a tag designed to work well in dry heat may not work well in an autoclave application that sterilizes with steam under pressure, nor does it necessarily meet all the other conditions of the high temperature application.

High temperature and chemical resistance RFID tag OPP6019

The high temperature tag OPP6019 operates in the UHF frequency 840-960MHZ. It is specially designed to withstand extreme temperatures up to 230°С for 30 minutes ,180°С for 120minutes , IP68 protection rating and chemical resistance(such as Fuel B, mineral oil, petroleum, salt mist, vegetable oil).
Ergonomic and efficient, the high temperature tag OPP6019 displays reading distances of up to 4.6m with a mobile reader and 6.5m with a fixed reader. It is mainly used in industry for the identification in industrial furnaces,the multi-cycle passages in drying chambers and so on.

Functional Specifications
RFID Protocol:EPC Class1 Gen2, ISO18000-6C
Frequency:US 902-928MHz, EU 865-868MHz
IC type:Alien Higgs-4
Memory:EPC 128bits, USER128bits, TID64bits
Write Cycles:100,000times
Data Retention:Up to 50 Years
Applicable Surface:Metal Surfaces
Read Range(On Metal) :(Fix Reader:ThingMagic M6-E, 36dBm/4W)
630cm – (US) 902-928MHz, on metal
650cm – (EU) 865-868MHz, on metal
Read Range(On Metal) :(Handheld Reader: OP9908,R2000,33dBm/2W)
450cm – (US) 902-928MHz, on metal
460cm – (EU) 865-868MHz, on metal
Warranty:1 Year
Physical Specification
Size:60mmx19mm (Hole:D5mmX2)
Material:PPS shell
Mounting Methods:Adhesive, Screw,Binding
Enivironmenal Specification
IP Rating:IP68
Withstands Exposure To:Fuel B, mineral oil, petroleum, salt mist, vegetable oil
Storage Temperature:-55°C to +200°C (230°С for 30 minutes, 180°С for 120minutes)
Operation Temperature:-40°C to +150°C
Certifications:Reach Approved,RoHS Approved,CE Approved
More info view http://www.oppiot.com/opp6019.html

OPP IOT can create/develop RFID tags to meet your unique material property or specific environmental requirements.
More info,please Contacts us:
OPP IOT Technologies CO., LTD.
Address: 2104 Room SANDI International Finance Centre,249# MingXin Street LongQiao,ChengXiang Putian City Fujian, P.R, China
P.C: 351100
Tel: (0086)594 2790031
E-mail: info@oppiot.com
WhatsApp: +86 180 3034 2267

What does OPP IOT do?

OPP IOT is a leader in Radio Frequency Identification with the widest selection of custom built RFID tags and labels available.

OPP IOT offers dozens of unique designs and constructions RFID tags. Our experts have a proven track record in solving your most challenging RFID problems and can assist in implementing a strategy that is right for you!
OPP IOT also can create/develop RFID tags to meet your unique material property or specific environmental requirements. Innovators in identification for more than 10 years,OPP IOT designs and manufactures RFID tags for harsh environments and long-term durable outdoor applications. Our expertise in encapsulations, materials and partnerships with inlay makers like Alien, Avery, SmarTrac, Xerafy, HID and TROI allow us to provide multiple solutions to fit your environment.

More info,please Contacts us:
OPP IOT Technologies CO., LTD.
Address: 2104 Room SANDI International Finance Centre,249# MingXin Street LongQiao,ChengXiang Putian City Fujian, P.R, China
P.C: 351100
Tel: (0086)594 2790031
E-mail: info@oppiot.com
WhatsApp: +86 180 3034 2267

high temperature UHF On-metal tag opp6019 for industrial markets and health care line

OPP IOT launched a high temperature UHF On-metal tag opp6019 for industrial markets and health care line. The high temperature RFID tag opp6019 is 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 temperature(230°С for 30 minutes, 180°С for 120minutes)), acid and alkaline resistance(Fuel B, mineral oil, petroleum, salt mist, vegetable oil).

OPP6019 RFID tags are with flexible installation, such as rivets, screws fixed, or two-side glue, super glue etc. The high level of durability improves RFID tag lifetime of up to 10 years, even for harsh industrial environments.

OPP IOT can develop RFID tags to meet your unique material property or specific environmental requirements.
More info,please Contacts us:
OPP IOT Technologies CO., LTD.
Address: 2104 Room SANDI International Finance Centre,249# MingXin Street LongQiao,ChengXiang Putian City Fujian, P.R, China
P.C: 351100
Tel: (0086)594 2790031
E-mail: info@oppiot.com
WhatsApp: +86 180 3034 2267

RFID tags in the industry can be a good choice

While barcodes are based on optical identification, RFID tags are read via radio waves. In industrial plants, especially in the ex-industry, the objects are exposed to strong demands. Barcodes can fade, pollute, or be obscured by other objects due to UV irradiation. These are only a few circumstances in which the barcode can reach its limits.

RFID Tags, however, have the ability to be captured without direct visual confirmation, thus guaranteeing flawless identification even in challenging and harsh industrial environments. An RFID system always consists of at least one tag and one reader / writer unit. Depending on the type of construction, tags can be active or passive. The electromagnetic induction of the RFID reader activates passive tags, whereas active tags have their own battery. They send their information in periodic intervals and have a much higher range than passive tags. In RFID, you distinguish between different frequency ranges, from LF over HF and UHF, up to rarely occurring SHF (Super High Frequency).

In addition to better legibility, RFID tags are also significantly more robust against physical and chemical environmental influences, such as abrasion and moisture. Furthermore RFID tags can be captured in groups, so that with a single scan, e.g. the volume of a complete euro pallet, can be recorded.

The significant difference between barcodes and RFID tags is primarily the handling of information storage. While the coded information of a barcode is permanently defined with its creation, it can be changed and adapted with RFID tags. Since RFID tags are not based on an optical system, they are also significantly less susceptible to falsification because they cannot be copied, photographed, or scanned.