What is RFID? What Does RFID Stand For?
RFID is an acronym for “radio-frequency identification” and refers to a technology whereby digital data encoded in RFID tags or smart labels (defined below) are captured by a reader via radio waves. RFID is
What is RFID? What Does RFID Stand For?
similar to barcoding in that data from a tag or label are captured by a device that stores the data in a database. RFID, however, has several advantages over systems that use barcode asset tracking software. The most notable is that RFID tag data can be read outside the line-of-sight, whereas barcodes must be aligned with an optical scanner. If you are considering implementing an RFID solution, take the next step and contact the RFID experts at AB&R® (American Barcode and RFID)
HOW DOES RFID WORK?
RFID belongs to a group of technologies referred to as Automatic Identification and Data Capture (AIDC). AIDC methods automatically identify objects, collect data about them, and enter those data directly into computer systems with little or no human intervention. RFID methods utilize radio waves to accomplish this. At a simple level, RFID systems consist of three components: an RFID tag or smart label, an RFID reader, and an antenna. RFID tags contain an integrated circuit and an antenna, which are used to transmit data to the RFID reader (also called an interrogator). The reader then converts the radio waves to a more usable form of data. Information collected from the tags is then transferred through a communications interface to a host computer system, where the data can be stored in a database and analyzed at a later time
The more technical answer is that RFID transmits data through electromagnetism. Small, electrically-charged particles interact with each other, creating an electromagnetic field. This field is made up of different waves of photons; the collection of waves from lowest to highest frequency is what we call the electromagnetic spectrum.
Every day, you use several devices that rely on communicating through the generation of waves in the electromagnetic spectrum. For example, radio stations use transmitters to generate waves sending music to the receiver in your car radio. RFID uses this same principal to send information between the tag and the reader.
What uses are there for RFID?
The two broad uses for RFID are 1- Access Control, and 2- Asset Tracking. Chances are you already use RFID and didn’t know it.
Contactless payment and transit/toll systems use RFID to identify who you are and process your transaction or allow you through the toll gate.
Passive RFID tags in retail products assist in loss prevention and enable emerging business methods, like consumer self-checkout.
Hospitals use RFID to improve efficiency, provide better patient care and reduce the risk of spreading an infection.
Manufactures embed RFID tags into their products to track each stage of production and ensure quality,
This is just a few real world examples, the application of RFID is near limitless
What is the maximum transmit power?
This is country specific and in some cases further regulated by the region or city. This list is by no means the full list of all of the different frequency regulations. To ensure your compliance with local regulations make sure that you review the current standards prior to purchasing your readers.
Maximum Transmit Power
|125 kHz & 134.2 kHz||72 dBμA/m|
|13.56 MHz||60 dBμA/m|
|433 MHz||0.1 Watts|
|860 – 960 MHz||Download the GS1 Regulations Outline|
|2.4 – 2.483 GHz||4 W indoor
0.5 W EIRP outdoor
|5.725 – 5.875 GHz||4 W USA/Canada
0.5 W Europe
What is the maximum read distance of RFID?
Generally speaking, RFID tag maximum read distances are as follows:
125 kHz and 134.2 kHz
Usually 10 cm (4 inches)
It is possible to get read distances over 30cm (1 foot), but these cases need individual assessmen
Usually 50 meters (160 feet)
An emerging standard.
Currently up to 100 meter (325 foot) maximum
NOTE: 2.45GHz RFID is not the same as WiFi enabled Internet-of-Things devices which also work on the 2.4GHz band
5.7GHz, 2.4 GHz & 433 MHz Long Range RFID Technologies
All three of these technologies use active (battery assisted) tags, which allow them to reaching distances of over 65 feet (20 meters) and can relay sensor information back along with their unique identification. This makes them ideal for situations where other technologies cannot meet the requirements. One such example would be in transit tracking of a shipment for temperature, tampering or g-force. The reader can then be integrated with GPS allowing the entire shipment to be tracked much more cost effectively than GPS tracking each container individually.
433 MHz Active RFID
Which results in distances over 2 KM (1.24 Miles) being possible with the right antenna’s
Safety & Controlled Environments
Designed for applications in Transportation, Mining, Emergency Evacuation, Supply Chain, Petrochemical, Healthcare, Manufacturing, Gated Communities, Education, and the Military. The unique characteristics of our 433 MHz technology make it suitable for environments where interferance or electro-static sensitivity prevent most other electronics such as airports or specialized chemical storages. The sealed ATEX certified tags emit such a low power signal that it is well below any regulatory guidelines, making them safe for use in static free areas where cell phones must be powered down.
The nature of the signal is also fairly unique in that it is able to pass through quite a large amout of rock, concrete, steel, or water. Making it beneficial for finding victims in mining accidents or avalanches