Universal Micro RFID Tag


  • Micro RFID tag with extremely small footprint and thin profile while still achieving excellent read range
  • Custom engineered foam core designed specifically to obtain optimum read distances
  • Patented micro RFID inlay design provides excellent read ranges regardless of surface material–metal, plastic, glass, even wood
  • Subsurface printing on durable polyester protects printed copy against moderate solvents and caustics/acids
  • Compatible with RFID Tracking Software

The Universal Micro RFID Tag measuring 1 7/8” x 5/8” is a great solution to your identification projects that require a small RFID tag with great read range. With a tiny footprint and low profile, the Universal Micro RFID Tag easily fits where other tags are too big and obtrusive.

Achieving up to 9 ft read range on metal and 4-5 ft on plastic, wood, and glass, the Universal Micro RFID Tag provides incredible read ranges compared to other tags in its class. It’s non-rigid, durable, foam core and polyester construction sets the Universal RFID Micro apart from molded RFID tags allowing for greater flexibility in tag placement.

Developed using the same premise as our original Universal RFID Asset Tag, the Universal Micro RFID Tag is a surface-independent using a patent inlay design and passive RFID technology to obtain excellent read ranges regardless of mounting surface.

Along with the Universal RFID Asset Tag, Universal RFID Hard Tag, and Universal Mini RFID Tag, these products make a revolutionary product line that allows you to use only one RFID tag for your asset tracking applications.

Subsurface printing the Universal Micro RFID Tag protects any copy, logo, and/or barcode against moderate solvents and caustics. Additionally, our four-color processing capabilities allow you to promote your company with a label that shows off your company’s logo and style.

What are Micro RFID Tags?

Micro RFID tags are small RFID device with a chip and antenna that communicates with an RFID reader through radio waves. They typically have a small footprint, like the 1 7/8" x 5/8" Universal Micro RFID Tag from Metalcraft, and is often used in applications where space is limited or where the RFID tag must be unobtrusive.

Potential Applications for Universal Micro RFID Tags

Asset Tracking – the barcode and human readable ID number on Universal Micro RFID Tags can be used to track information about the metal asset the RFID tag is adhered to, i.e., laptops, furniture, containers, equipment and more.

Work-in-Process – the barcode and/or identification number on Universal Micro RFID Tags can identify a “batch” OR “lot” of product or just simply identify each product as it travels through the production process.

Specifications Data
Material Inlay wrapped around 39 mils custom engineered foam.
Serialization Barcode and human-readable equivalent are produced using the latest high-resolution digital technology available, which provides excellent clarity and easy scanning. Code 39 is the standard symbology with a range of 2.7 to 9.4 CPI (characters per inch). Optional linear and 2D symbologies available.
Label Copy The label copy may include block type, stylized type, logos or other designs
Colors Standard colors include black, red, yellow, green, dark blue, purple, orange or blue. Custom spot colors are also available at no additional charge. Due to contrast needed for the bar code scanner, all bar codes are black.
Standard Adhesive Pressure-sensitive acrylic adhesive
Frequency Range Custom designed UHF inlay optimized for use at 915 MHZ. ( UHF, Class I Gen 2 )
Sizes 1.875" x .625"
Packaging Produced and shipped in roll form.
Destructive Test Summary
Impact resistance test - Impact test consisted of 10 pound cylindical weight being dropped vertically from a height of 15.75”. Tag samples were placed on concrete floor. A tag passed the test if the inlay still reads with a handheld reader. All tags tested all were still readable after being subject to impact with a 10 lb. weight dropped from a vertical distance of 15.75”.
Destructive Test Data
Chemical Test Summary
The Universal Micro tags were attached to a sheet of glass submerged in various chemicals. Observations were made at the following intervals: 2 hours, 24 hours, 48 hours. A Motorola handheld RFID reader as well as a handheld bar code reader were used to test the samples.
Chemical Test Data
Length of immersion Water Glas cleaner Bathroom cleaner Isopropyl alcohol 99% Acetone NaOH pH 12.0 HCI pH 1.0 Brake fluid
2 hours no effect no effect no effect adhesive adhesive ooze no effect no effect no effect
24 hours no effect no effect no effect adhesive ooze tag delaminated no effect no effect no effect
48 hours no effect no effect no effect adhesive tag delaminated no effect no effect no effect
Temperature Test Summary
High-temperature resistance test - These tags were attached to a sheet of glass at raised temperatures for 15 minutes. Tags were then removed from the oven and tested for readability immediately.

Low-temperature resistance test - The tags were attached to a sheet of glass and exposed to -40°F for 24 hours. Tags were then checked for readability with a Motorola handheld RFID reader. All samples were readable while at temperature just prior to removal from freezer. No tag construction defects were observed and adhesive still had a strong bond while in the freezer.
Temperature Test Data
Temperature RFID read test (immediately out of oven) Appearance of tags
200°F Reads well No change
300°F Reads well No change
400°F Reads well Slight curling at edge
500°F Reads well Tag destroyed
Read Range Test Summary
In many cases the tags read intermittently for longer distances than those indicated, however, the results reported below were for continuously responding reads.
Read Range Test Data
Universal Micro Anechoic Chamber Results
Sample Metal Wood Glass Plastic Cardboard
Average 9 feet 5 feet 5 feet 4 feet 4 feet
Barcode Readability Test Data
Abrasion Test Data
Label Adhesion Test Data
Pull Test Data

RFID Tracking Software from Grey Trunk

Your Complete RFID Asset Tracking System

Grey Trunk’s cloud-based asset tracking system makes asset tracking fast and simple. Eliminate hours of work using RFID and barcode technology to easily find and catalog your assets. Grey Trunk's asset tracking app has it all - from mobile to web, we have your asset management tracking solution so you can take control of your assets, from anywhere.

Capture Your Fixed Asset Inventory in Minutes

Stop wasting time on inventory management. Harness RFID technology to know which assets are found, missing, misplaced, or new to your system—in minutes, not hours or days. Spend more time running your business instead of running in circles.

Your Turnkey RFID Asset Tracking Solution

We make RFID easy. Grey Trunk gives you an all-in-one system including software, RFID tags, and handheld readers. We’re ready to go from the minute you sign up—meaning transitioning to Grey Trunk couldn’t be easier.

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