RFID Tracking System | Active and Passive Tags
RFID tags can be tracked using a "portal" system. (The picture is of a portal designed by GigaTrak for a customer). As items with a tag pass through the portal, the tag's unique ID number is read. Special RFID enabled handheld computers can also be used to read each...
Date: 2017-12-05 10:32:44
Website:
gigatrak.com
RFID System Components - Firefly RFID Solutions
Host computer with appropriate application software
RFID Tags
RFID tags are tiny microchips with memory and an antenna coil, thinner than paper and some only 0.3mm across. RFID tags listen for a radio signal sent by a RFID reader. When a RFID tag receives a query, it responds by transmitting its unique ID code and other data back to the reader. There are two types of RFID tags--passive and active.
RFID Readers
RFID readers, also called interrogators query RFID tags in order to obtain identification, location, and other information about the device or product the tag is embedded in. The RF energy from the reader...
Date: 2015-01-12 21:19:45
Website:
http://www.fireflyrfidsolutions.com
Related topics : rfid active reader passive tag / types of rfid tags and readers / active rfid tag and reader / active rfid tag reader / rfid passive tag reader cost
active rfid reader price, active rfid reader, rfid active ...
At present, with the rapid growth of urban traffic, low price active RFID readers have already been used in the vehicle management and parking lots. Just as people see, vehicles not only give convenience for people, and lead to many troubles owing to lacking in active RFID reader, such as traffic congestion and parking control. Fortunately, DAILY RFID, a leading company who is concentrated on...
Date: 2017-10-23 14:08:49
Website:
rfid-in-china.com
Buy RFID Tag Sample Pack (UHF Passive) Online at Low ...
Sponsored Products are advertisements for products sold by merchants on Amazon.in. When you click on a Sponsored Product ad, you will be taken to an Amazon detail page where you can learn more about the product and purchase it.
To learn more about Amazon Sponsored Products, click here .
Product description
"RFID Tag Sample Pack | Passive UHF Tags Summary The RFID Tag Sample Pack contains various passive UHF tags so you ll be able to test a wide range of tags and ultimately choose the best one for your application. Inside the pack you ll receive a variety of raw inlays converted labels durable tags hang tags and metal mount tags among other...
Website:
amazon.in
ATEX Active WiFi & RFID Tag iTAG100 - English
ATEX Active WiFi & RFID Tag iTAG100
ATEX Active WiFi & RFID Tag iTAG100
Call for price
For more information about how to use this product, please click here for more information .
The iTAG100 is a small, long-life Wi-Fi based Active RFID device that can be placed on any asset, allowing the Extronics system to locate assets that are not Wi-Fi enabled.
SKU: atex_id_544
For more information about...
Website:
http://www.atexshop.com
RFID Applications In Hospital Equipment Tracking - Supply ...
RFID Applications In Hospital Equipment Tracking
Source: Supply Insight
• White Paper: RFID In Healthcare
Even before the recent RFID mandates were introduced, the problems of managing and tracking equipment and assets have plagued hospitals and healthcare facilities worldwide. Ranging from bed facilities, IV pumps, surgical equipment, to wheel chairs, there are assets and equipment that create challenges for the healthcare facility.
RFID technology offers a remedy to these problems through active RFID tags that can be placed on the equipment or the asset. The types of RFID...
Website:
https://www.hospitalnetwork.com
RFID Tags Past and Present - How RFID Works - HowStuffWorks
RFID Tags Past and Present
Thinkstock/Hemera/ Thinkstock
RFID technology has been around since 1970, but until recently, it has been too expensive to use on a large scale. Originally, RFID tags were used to track large items, like cows, railroad cars and airline luggage, that were shipped over long distances. These original tags, called inductively coupled RFID tags, were complex systems of metal...
Website:
http://electronics.howstuffworks.com
Related topics : rfid active reader passive tag / cost of active and passive rfid tags / active and passive rfid tags / semi active rfid tags / semi passive rfid tags
433 MHZ. RFID Card Tag Active - GAO RFID Asset Tracking
433 MHZ. RFID Card Tag Active - Request Further Information About this Product
433 MHZ. RFID Card Tag Active - Overview:
An internal battery powers the Wavetrend L-series of Active Tags. The Personnel Tag will, for the duration of its life, transmit a Radio Frequency (RF) signal at a pre-set time-interval. The Tag life is estimated at 5 years at a transmission time interval of approximately 1.5...
Website:
http://www.gaorfidassettracking.com
Related topics : 433 mhz active rfid tags / active rfid tag battery life / 433 mhz rfid tag / 433 mhz active rfid / active rfid asset tags
Asentrix Systems - RFID - Active RFID Asset Tag, Active ...
Active RFID Asset Tag
AXCESS Inc. AT-132A
The AT-132A Asset Tag is a high performance active RFID tag based on patented automatic identification technology. The tag can be affixed to virtually any asset (laptops, computers, peripherals, electronic equipment, pallets, inventory items, etc.) for effective, long-range asset protection and monitoring throughout the enterprise or supply chain.
Signal...
Date: 2005-03-21 22:48:11
Website:
http://www.asentrix.com
433 MHZ. RFID Card Tag Active - GAO RFID Asset Tracking
433 MHZ. RFID Card Tag Active - Request Further Information About this Product
433 MHZ. RFID Card Tag Active - Overview:
An internal battery powers the Wavetrend L-series of Active Tags. The Personnel Tag will, for the duration of its life, transmit a Radio Frequency (RF) signal at a pre-set time-interval. The Tag life is estimated at 5 years at a transmission time interval of approximately 1.5...
Website:
http://www.gaorfidassettracking.com
433 MHZ. RFID Card Tag Active - GAO RFID Asset Tracking
433 MHZ. RFID Card Tag Active - Request Further Information About this Product
433 MHZ. RFID Card Tag Active - Overview:
An internal battery powers the Wavetrend L-series of Active Tags. The Personnel Tag will, for the duration of its life, transmit a Radio Frequency (RF) signal at a pre-set time-interval. The Tag life is estimated at 5 years at a transmission time interval of approximately 1.5...
Website:
http://www.gaorfidassettracking.com
What is RFID and How Does RFID Work? - AB&R®
What is RFID - How Does RFID Work
What is RFID?
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 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...
Website:
http://www.abr.com
Rugged 2.4-GHz Active RFID Reader For Industrial Applications
This 2.4-GHz active RFID reader combines an impressive long range with a rugged design suitable for harsh industrial applications and survival in application temperatures up to 70 Celsius degree.
For industrial applications, this rugged 2.4-GHz active RFID reader is optional with various layer communications interfaces. To download tag data to a host computer, this 2.4-GHz RFID reader uses RS232,...
Website:
https://www.varinsights.com
RFID - RF Stock Management Controller - Proteus Software
» RFID - RF Stock Management Controller
RFID - RF Stock Management Controller
RF Stock Management - RFID Controller
The Proteus RFID Stock Management Controller provides the ability to record the unique details of each stock item that has an RFID Tag/Label. The tags are read by the RFID Reader to record the location and movement of stock into, around and out of the warehouse providing complete...
Website:
http://www.proteussoftware.com
RFID frequency ranges - Centre National RFID
RFID frequency ranges
1. The RFID frequency spectrum
RFID is considered as a non specific short range device. It can use frequency bands without a license. Nevertheless, RFID has to be compliant with local regulations (ETSI, FCC etc.)
oLF : 125 kHz - 134,2 kHz : low frequencies,
oHF : 13.56 MHz : high frequencies,
oUHF : 860 MHz - 960 MHz : ultra high frequencies,
oSHF : 2.45 GHz : super high...
Website:
http://www.centrenational-rfid.com
Related topics : lf hf uhf rfid tags / passive rfid tag frequency range / difference between hf lf rfid tags / active rfid tag frequency range / hf rfid tag frequency
What Is an RFID Printer? | eHow
Jupiterimages/Photos.com/Getty Images
Radio-frequency identification tags store and wirelessly transfer data. Often used as an alternative to traditional barcodes, RFID tags provide data storage and communication in various contexts, including retail and industry. RFID printers produce RFID tags. An RFID tag can communicate stored data using either an electromagnetic field or radio waves. Many...
Website:
http://www.ehow.com
Related topics : printing passive rfid tags / rfid tag printers / rfid tag printer / passive rfid tag uses / active rfid tag uses
RFID Reader & Tags - Active RFID Reader | Passive RFID Reader
UHF Passive Handhelds
Portable handheld RFID and Barcode readers with a touch screen interface and Windows Mobile-based operating system. Available with multiple polarization options. Up to 10 meter read ranges. Support for EPC Class 1 Gen 2 protocol and more.
UHF Passive Fixed Readers
Fixed UHF Passive readers with multiple antenna options like portal, ceiling, wall mountable. Integrates with...
Website:
https://www.assetpulse.com
Rugged 2.4-GHz Active RFID Reader For Industrial Applications
This 2.4-GHz active RFID reader combines an impressive long range with a rugged design suitable for harsh industrial applications and survival in application temperatures up to 70 Celsius degree.
For industrial applications, this rugged 2.4-GHz active RFID reader is optional with various layer communications interfaces. To download tag data to a host computer, this 2.4-GHz RFID reader uses RS232,...
Website:
https://www.datacollectiononline.com
Active RFID Tags - Elpas
Access Control Systems
Active RFID Tags
Elpas offers a comprehensive selection of application specific Active RFID Tags designed to suit the safety, security and visibility needs of the Healthcare, Commercial and Correctional sectors.
Active RFID Tags for safeguarding hospital patients, assisted living residents and staff personnel who require added safety and to better manage high-value...
Website:
http://www.elpas.com
Related topics : active rfid tag in real time location system / active rfid based asset tracking system / active rfid asset tags / active rfid tags locator / active rfid tag applications
Active Passive RFID Tag Reader Proximity - advantidge.com
Contact Us
What's the Difference Between Active and Passive RFID for ID Badges?
Active RFID and Passive RFID are fundamentally different technologies that are often mistaken for one another.� While both use radio frequency energy to communicate between a tag and a reader, the method of powering the tags is different.� Active RFID uses an internal power source (battery) within the tag to...
Website:
https://www.advantidge.com
RFID Device - msdn.microsoft.com
An RFID (radio frequency identification) device is any device that creates an RFID tag, modifies information on an RFID tag, or receives information from an RFID tag. Such devices include printers, writers, readers, handheld or fixed devices, and sensors. An RFID printer is a device that prints data on RFID label tags as they pass through the printer. An RFID writer is a device that writes...
Website:
https://msdn.microsoft.com
Active RFID Technology-Active Tags
Active RFID Technology-Active Tags
The tags for personnel can be worn using standard ID card straps or lanyards. Active tags are available in a variety of form factors, such as Key fob, Vehicle and Personnel. Personnel Tags have a standard ID card footprint (CR80) for attaching a photo ID and are available with Panic Button.
Key Features:
Tags constantly transmit a heart beat radio frequency pulse every 2 seconds
Have on-board Power Source (Battery)
Tags are always awake, due to embedded battery
Long life battery technology - up to 5 years for a tag
High impact resistant UV stabilized PVC case ultrasonically welded and sealed
9 cm to...
Website:
http://www.remotetrackingsystems.com
Related topics : rfid active tag technology / rfid active reader passive tag / active rfid tag battery life / active rfid tag standard / active rfid tag read range
RFID System Hardware, Supplies, & Equipment - Big Sales ...
RFID Software: Inventory, Asset Tracking, Surveillance, Printing & More
Barcode Giant has a full range of RFID Tracking Software , RFID Printing Software , RFID Inventory Software , and RFID File Tracking Software to help manage the items for your business with the latest technology. Our RFID software is designed to collect data using passive UHF RFID technology. Check out our RFID Software...
Website:
barcodegiant.com
The Skinny on RFID - Information Technology Programs
RFID technology is already used in many technologies today. The future of RFID technology seems limitless as new ways to utilize its effectiveness are discovered frequently.
Passive and Active Tags
As stated before, passive RFID tags do not have an internal power supply. There is a minute electrical current induced in the antenna by the radio signal it receives. This small current is enough to...
Website:
https://informationtechnologyprograms.org
RFID enabled wristbands - RFID inlays based silicon and ...
Contact us
RFID Wristbands
Wristband RFID active used the power of RFID (short for radio-frequency identification) technology, in a spectrum of colors, shapes, materials, and custom options to meet your unique RFID application needs.
RFID based bracelet can track data in real time and follow, it applications such as access control, file tracking, race timing, cashless payments, keyless door...
Website:
https://makarfid.com
Flexible UHF Gen 2 Mount-On-Metal RFID Tag
GAO RFID Inc. is offering its flexible UHF Gen 2 mount-on-metal RFID tag which is ideal for both indoor conditions and for basic outdoor use. It is appropriate for multiple applications such as asset tracking and supply chain applications and is especially useful for tagging cylindrical metal objects.
The on metal Gen 2 RFID tag, model 116046, operates over the frequency range of 902 to 928 MHz...
Website:
supplychainmarket.com
RFID handbook : applications, technology, security, and ...
1 online resource (1 volume (various pagings)) : illustrations
Contents:
Chapter 1. Physics and Geometry of RFID --
Chapter 2. EPCglobal Network --
Chapter 3. Design Automation for RFID Tags and Systems --
Chapter 4. Far-Field Tag Antenna Design Methodology --
Chapter 5. Contemporary RFID Reader Architecture --
Chapter 6. Progress in RFID Education --
Section II: Technology --
Chapter 7. RFID...
Website:
worldcat.org
RFID handbook : applications, technology, security, and ...
1 online resource (1 volume (various pagings)) : illustrations
Contents:
Chapter 1. Physics and Geometry of RFID --
Chapter 2. EPCglobal Network --
Chapter 3. Design Automation for RFID Tags and Systems --
Chapter 4. Far-Field Tag Antenna Design Methodology --
Chapter 5. Contemporary RFID Reader Architecture --
Chapter 6. Progress in RFID Education --
Section II: Technology --
Chapter 7. RFID...
Website:
worldcat.org
RFID Tag ICs - everything RF
RFID Tag ICs Search Tool
RFID Tag ICs are integrated into each RFID tag. Each tag has an IC that holds the basic information which is used to identify the tag. Once the RFID reader sends out a signal,...
Website:
https://www.everythingrf.com
Related topics : hf rfid tag ic / rfid tag ic / active rfid tag and reader / active rfid tag reader / rfid tag information
RFID Tags - Asset labels, Asset tags & Active RFID Tag ...
RFID Tags & Asset Labels
Save time. We find you the most appropriate system for your budget.
We can source almost any type of asset tag including asset labels and RFID microchips. As well as supplying samples, we can recommend optimum label size, material, and content before submitting artwork to you for approval prior to production.
Labels & Tags
There are two types of tag that are ideal for...
Date: 2015-07-10 14:18:26
Website:
assettrac.co.uk
Related topics : active rfid asset tags / rfid asset tagging system / radio frequency identification tags (rfid) / rfid radio frequency identification tags / rfid tags for asset tracking
RFID System Components | Starport Technologies LLC
Host computer with appropriate application software
RFID Tags
RFID tags are tiny microchips with memory and an antenna coil, thinner than paper and some only .3mm across. RFID tags listen for a radio signal sent by a RFID reader. When a RFID tag receives a query, it responds by transmitting its unique ID code and other data back to the reader. There are two types of RFID tags-passive and active.
RFID Readers
RFID readers, also called interrogators wuery RFID tags in order to obtain identification, location, and other information about the device or product the tag is embedded in. The RF energy from the reader antenna is...
Website:
http://starporttech.com
Active RFID Reader provides read range of up to 100 m.
Active RFID Reader provides read range of up to 100 m.
Press Release Summary:
Jan 05, 2010 - With ability to simultaneously detect multiple tags within 100 m range, 2.4 GHz DL3800 automatically receives information from active tags and can read/write configuration and user data to tag. Plug-and-Play device can interface with computers via TCP/IP or USB cable, and can be mounted on location for...
Website:
https://news.thomasnet.com
Types of RFID Tags - AB&R® (American Barcode and RFID)
Support
Passive RFID Tags
Passive tags are comprised of three elements: an integrated circuit or chip, an antenna, and a substrate.
The RFID chip stores data and performs specific tasks. Depending on its design, the chip may be read-only (RO), write-once, read-many (WORM), or read-write (RW). Typically, RFID chips carry 96 bits of memory but can range from 2-1000 bits.
Attached to the chip is the...
Website:
http://www.abr.com
Related topics : difference between active rfid tag and passive rfid tag / difference between passive and active rfid tags technology / rfid active reader passive tag / active and passive rfid tags / difference between active and passive rfid tags
RFID News: Should the DoD Tag its RFID Tags?
RFID News: Should the DoD Tag its RFID Tags?
GAO report says government could save millions by re-using active tags; Is there a battlefield issue?
SCDigest editorial staff
The News: A report from the Government Accountability Office (GAO) suggests the Department of Defense could be wasting millions by not re-using expensive active RFID tags.
The Impact: Not much in practice, although it has...
Website:
http://www.scdigest.com
Related topics : active rfid tag uses / dod active rfid tags / how much do active rfid tags cost / active rfid tag design / active rfid tag components
Meenakiran Enterprises,RFID Tags, RFID Tag Manufacturers ...
Custom made tags to suit your needs. Smart, Simple and Efficient.
Welcome to MEENAKIRAN Enterprises
MEENAKIRAN ENTERPRISES is a premium supplier of high-quality passive RFID tags. The purpose of our existence is to enable customers to maximize value through the implementation of an efficient and economical RFID Systems. MEENAKIRAN ENTERPRISES is promoted by visionary technocrats and supported...
Date: 2018-08-07 04:32:48
Website:
http://meenakiran.com
Product - Ramp RFID
Ramp is a premium preferred supplier of an extensive range of passive and active RFID tags, readers and antennas to suit a multitude of specific requirements. Our team of experienced professionals will work with you to determine the most suitable components for your requirements.
RFID TAGS
RFID tags are typically placed on objects such as assets, inventory, vehicles or people in order to uniquely...
Website:
ramprfid.com
Active RFID Tags & Readers - LJ RFID Card
There are many kinds of RFID TAGS,�RFID INLAYS, RFID�READERS�including�full range of RFID product frequency in UHF (900MHz),HF (13.56Mhz) and LF (125KHz) and 2.4GHz active RFID�for sale here, such as RFID wristbads,�and so on. But these various kinds of RFID tags, inlays, RFID cards and readers...
Website:
http://www.lj-rfidcard.com
SAG RFID - RFID Transponder | RFID TAG | PROXIMITY CARD ...
Active RFID Tag uses an internal power source, such as a battery, within the tag to continuously power the tag and its RF communication circuitry. Active RFID tag allows extremely low-level RF signals to be received by the tag (since the reader/interrogator does not power the tag), and the tag can generate high-level signals back to the reader/interrogator. Active RFID transponders are...
Website:
http://www.sag.com.tw
Related topics : passive rfid tag and reader / semi passive rfid tag range / difference between active rfid tag and passive rfid tag / passive rfid transponder tags / difference between passive and active rfid tags technology
Using the memory of the RFID chip - Centre National RFID
Home > RFID for all > Various functions of the RFID
Using the memory of the RFID chip
As seen with the unique identifier, information can be stored in the RFID chip's memory. Due to the cost of tags and the communication throughput permitted by most standards, RFID chip memories are rarely larger than ten kilobits.
This is a long way off the storage capacity currently offered by the smallest...
Website:
http://www.centrenational-rfid.com
Related topics : difference between passive and active rfid tags technology / difference between active rfid tag and passive rfid tag / difference between active and passive rfid tags / radio frequency identification tags (rfid) / rfid radio frequency identification tags
What is Active RFID Tag: Features and Applications of ...
Written By:
Shurvi Sisodiya
The active RFID tags have their own source of power. They can transmit stronger signals over long distances and can operate in rugged environment for many years. Because of the on-board source of power they are larger in size and expensive. Then too Active RFID and Real-Time Location solutions (RTLS) are saving millions of dollars for enterprises around the world....
Website:
https://www.engineersgarage.com
Range of RFID products - Cisper
Home
Products
At Cisper you will find the most comprehensive range of best performing UHF RFID products from world leading manufacturers.
RFID Readers:
RFID readers collect tag data and provide the connection between tag data and enterprise system software solution that need the information. RFID readers communicate with tags that are within the RF-field, this way a number of tasks including...
Website:
cisper.nl
Related topics : uhf rfid tag reader / uhf passive rfid tag reader / lf hf uhf rfid tags / uhf near field rfid reader antenna / uhf rfid tag antenna
Active RFID Tags in Data Center Asset Management: A Quick ...
Active RFID Tags in Data Center Asset Management: A Quick Overview
August 29, 2013
Active RFID Tags in Data Center Asset Management: A Quick Overview
Posted by RF Code | Thu, Aug 29, 2013
Tweet
Data centers, with their countless racks and cabinets, may seem static at first glance, but these dynamic, unpredictable environments require precise and efficient asset management. Due to the high...
Website:
http://www.rfcode.com
My Active RFID - ELA innovation
My Active RFID
My Active RFID
Discover all�ELA Innovation RFID Active products. Do you have identification or location needs? Our tags and badges are made for you!
In addition, our range of wireless sensors adapts to all...
Website:
https://elainnovation.com
Related topics : long range active rfid tags / active rfid tag range / long range active rfid reader / long range active rfid / active rfid tags locator
How do RFID tags work | Passive Active BAP RFID tags
How do RFID tags work?
In addition to the way they are used, RFID tags can also be classified according to the presence or absence of a radio signal transceiver and an embedded power supply:
Active RFID tags: They embed a radio signal transceiver and a battery to power it. Thanks to the integrated power supply, active RFID tags can activate themselves regardless of the presence of a...
Website:
http://www.veryfields.net
RFID Tags, RFID Labels | Express Corp
Radio frequency identification (RFID) tags are smart barcode tags that transmit data through radio frequencies. Radio waves transmit data from the RFID tag to RFID reader, which then transmits the data to an RFID computer program. Industrial RFID tags are used to track automobiles, machines, and inventory throughout harsh industrial environments.
Active vs. Passive RFID Tags
Active RFID tags are...
Website:
expresscorp.com
RFID Transponder - BME Encyclopedia
A RFID Transponder is an ID system that uses small radio frequency identification devices for identification and tracking purposes. An RFID tagging system includes the tag itself, a read/write device, and a host system application for data collection, processing, and transmission. An RFID tag (sometimes called an RFID transponder) consists of a chip, some memory, and an antenna.
RFID tags that contain their own power source are known as active tags....
Date: 2014-08-17 20:59:39
Website:
https://wiki.bme.com
Related topics : active rfid tag uses / passive rfid tag uses / rfid active reader passive tag / radio frequency identification tags (rfid) / rfid radio frequency identification tags
Benefits of active RFID - RFID Discovery | RFID Healthcare ...
Active radio frequency identification (RFID) technology can be used to track the location of medical assets or patients in healthcare environments. It is ideal for high-value asset tracking, wandering patient safety, baby tagging, staff safety and temperature monitoring. Compared to passive RFID it provides longer read ranges and the option to record additional information such as temperature information or emergency call signals.
How active RFID works
In active RFID systems, assets or people are...
Website:
http://rfiddiscovery.com
RFID Tags, Bracelets and Credentials | Stark RFID Wearables
RFID Tags & Wearables
For event/venue management and asset tracking
Stark RFID uses UHF Gen 2 RFID tags for longer read ranges and faster data transfer. This is the industry benchmark and fastest growing market segment in RFID. We deploy millions of RFID tags, tracking people and assets for clients in event and venue management, retail and finished goods, and hospitals.
Our application developers...
Website:
http://www.starkrfid.com
RFID Singapore: RFID Tags,RTLS,Readers,Antenna & Solutions ...
Provider of RFID Hardware,Software,Tags, Readers, Antenna,Sensors, Active RFID and Passive RFID Solutions in Singapore.
Telephone: +65 81575246 | Email: Sale@RFIDSingapore.com.sg
Office at 6 Harper Road, #02-05/06 Leong Huat Building , Singapore 369674
RFID Singapore - About Us
RFID Singapore (SG) is a RFID Solutions Provider in Singapore and boasts many years of experiences specializing in...
Date: 2017-05-03 09:21:24
Website:
http://www.rfidsingapore.com.sg
Active RFID and Passive RFID Systems Described
Active vs Passive RFID
�
There are three basic types of RFID Systems at the time of this writing. The categorization and naming of these systems is based upon the design and operation�of the tags�(Active tags=Active System, etc). All systems rely upon a radio receiver and a radio transmitter. ��
The first system type is� Active RFID �where the� RFID Reader �(radio receiver) is...
Website:
iautomate.com
Related topics : how much do active rfid tags cost / passive rfid tag and reader / active rfid tag and reader / battery assisted passive rfid tag cost / passive rfid tag uses