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RFID Button - 16mm (125kHz)
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Price: $7.94
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Sparkfun Item #: SEN-09417 -

This is a simple, thumbnail-size RFID tag. These tags are great for sensing presence, identification, etc., and they're small, so they can be easily sewn into clothing or inserted into enclosures. Each tag comes with a unique 32-bit ID code and is not reprogrammable. The carrier frequency of this tag is 125kHz, so it works great with our ID-2, ID-12 and ID-20 RFID readers. We tested this RFID tag with one of our ID-12 readers and measured a maximum read distance of about 32mm. Features: 32-bit...

RFID Glass Capsule (125kHz)
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Price: $10.59
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Sparkfun Item #: SEN-09416 -

This is a glass, cylindrical RFID tag; it's very similar to those implanted into pets for identification purposes. But really guys, it's not for use inside your body. Please don't implant this thing into yourselves. Each tag comes with a unique 32-bit ID code and is not reprogrammable. The carrier frequency of this tag is 125kHz, so it works great with our ID-3LA, ID-12LA and ID-20LA RFID readers. We tested this RFID tag with one of our ID-12LA readers and measured a maximum read distance of...

RFID Tag (125kHz)
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Price: $3.44
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Sparkfun Item #: COM-14325 -

You might know RFID as the technology that Big Brother uses to track your every move. Quickly, don the tinfoil hats!! Only kidding. RFID is useful for sensing and identifying tagged people and objects for access control, automation and a whole range of different applications. This basic RFID tag works in the 125kHz RF range and comes with a unique 40-bit ID. It is not reprogrammable. This blank, smooth, mildly flexible RFID tag is ready for your logo (or hand-drawn scribble). Features: EM4001...

UHF RFID Tag (Set of 5)
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Price: $3.44
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Sparkfun Item #: WRL-14147 -

Ever wanted to play with those newfangled RFID tags? Although it's been around for a while, the technology has been extremely cost-prohibitive and difficult to implement without being an RF engineer. This affordable product opens the door for using RFID in your own projects! These paper-thin EPCglobal Gen2 tags work with our Simultaneous RFID reader. The tags can read and be written to --- and also have a kill feature. Each tag comes with a TID (Truly Unique ID) that can't be changed, but...

UHF RFID Tag - Adhesive (Set of 5)
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Price: $3.44
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Sparkfun Item #: WRL-14151 -

Ever wanted to play with those newfangled RFID tags? Although it's been around for a while, the technology has been extremely cost-prohibitive and difficult to implement without being an RF engineer. This affordable product opens the door for using RFID in your own projects! These paper-thin, adhesive EPCglobal Gen2 tags work with our Simultaneous RFID reader and can be stuck to practically anything you can imagine. The tags can read and be written to --- and also have a kill feature. Each tag...

Ultra-Small UHF RFID Tag Rain - 10 Pack
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Price: $35.22
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Sparkfun Item #: KIT-16464 -

The 'Rain' ultra-small UHF RFID tags from Murata are really exciting because of their fantastically small size -- they're just a 1.25 mm square with a height of 0.55 mm! The tag's tiny composure makes it really well suited to attaching to small or organically-shaped objects with a little bit of glue or epoxy. So what can you do with a small RFID tag? Strapping one to the tip of a Nerf dart to tell if you've hit the target or sounding the alarm if someone removes a trinket from your desk is...