HID InLine Tag™ Ultra RFID Tags

  • Extreme durability – resistant to outdoor elements as well as blunt and sharp impact
  • Multiple mounting options – glue or weld
  • Enhanced reliability – read-write on any material, up to 26 ft (8 m)
  • Broadband frequency – for worldwide use, including Europe, the United States and Japan

Related products


HID Global Partner

HID Global’s InLine Tag™ Ultra passive UHF Tags are HID’s most advanced general-purpose UHF tags available in the market. Choose from options that mount on any material while enabling read ranges of up to 26 ft (8 m).

InLine Tag devices improve data collection speed and accuracy for logistics applications, while making tracking more cost-effective. These tags enable complete accuracy of asset identification. For example, it is possible to track hundreds of metal kegs containing liquid loaded on a truck as it moves slowly through RFID reader enabled gates placed at points of distribution and delivery.

UHF technology enables anti-collision functionality, fast data-rate communication and password data protection for precise, reliable reading and updating of each tag’s 512-bit read-write memory. All InLine Tag RFID tags are compliant with EPC global-certified UHF Class 1 Gen 2 readers and modules, with broadband capability for international operations.

Additional information

Model Number

WF-SM-HID-6A7981 HID InLine Tag Ultra Weld


Identification Labeling, Metal Mount, Pharmaceuticals, Container Tagging, Gas, Harsh Environments, Manufacturing, Oil, Outdoor Use, Pedestal Labeling, Pedigree Tracking, Product Marking, Utility Labeling, Vehicle/Fleet Marking, Warehouse, Water Pipelines


PC/ABS high impact, stainless steel ring


4." × 1.4" × 0.6"

Temperature Service Range

-40°F to 185°F

Water Resistance

IP68, 68° F (20° C), 1 m × 24 h

Withstands Exposure to

Mineral Oil, Petroleum, Salt Mist, Vegetable Oil, Up to 80% humidity at 158°F

Solvents Resistance


Abrasion Resistance


Environmental Test Conditions

68°F (20°C), 100 h


IEC 68.2.6 (10 g, 10 to 2000 Hz, 3 axis, 2.5 h)


IEC 68.2.29 (40 g, 18 ms, 6 axis, 2000 times)


IEC 62262-IK09

Axial/Radial Force

1000 N, 10 sec

Shelf Life

2 Years, Stored at 70F and 50% Relative Humidity

RFID Performance

RFID Protocol EPC Class 1 Gen 2; ISO 18000-6C ISO 17364
Frequency Range 865 – 956 MHz (Global)
User Memory 512 bits
EPC Memory 128 bits
IC Monza 4QT

*Other single record and dual record chips available.

Tested Polarization:

Tag performance was experimentally measured in an anechoic chamber with a known set of experimental variables. The antenna used for measurements was linearly polarized and of monostatic configuration. The direction of tested polarization is as follows.

HID InLine Tag Ultra Weld Polarization Image

Optimal Read Range* on Different Material Surfaces:

HID InLine Tag Ultra Weld Read Range Graph

*Tag performance was measured free of material influence. Actual read ranges may differ depending on conditions such as environment, tag placements, hardware, etc.