Epoxy tag / potted tag
Hard tags
What is it?
An epoxy tag (also called a potted tag) encapsulates the RFID transponder in a pour-moulded epoxy resin. This creates a solid, waterproof, chemical-resistant housing that can be produced in custom shapes and sizes. Epoxy tags are a mid-range option between labels and premium ceramic/rugged tags, offering good environmental protection at moderate cost.
How it works
The RFID inlay is placed in a mould and liquid epoxy resin is poured around it, then cured at elevated temperature. The result is a solid block of cured resin with the transponder permanently embedded inside. The epoxy provides waterproofing, chemical resistance, and mechanical protection. The tag can be adhesive-mounted, screw-mounted, or embedded.
Use cases
- Tool tracking
- Metal asset identification
- Outdoor equipment tagging
- Industrial container tracking
- Returnable packaging
- Medical device identification
Pros
- Excellent waterproofing and chemical resistance
- Custom shapes and branding possible
- Good on-metal performance with spacer design
- More impact-resistant than ceramic
- Moderate cost
Cons
- Heavier and bulkier than labels
- Less temperature-resistant than ceramic (typically <150°C)
- Difficult to miniaturise
- Cannot be reused or reprogrammed once potted (some models)
Specifications
| Power type | Passive – powered by reader signal |
|---|---|
| Frequency | UHF (860–960 MHz) or HF (13.56 MHz) |
| Read range | UHF: 1–6 m; HF: up to 30 cm |
| Lifespan | 10–20 years |
| Price range | $2–$12 per unit |
| Environmental rating | IP67–IP68; -40°C to +150°C |