Table 3 Comparison with other reported diaper wetness RFID Tags. (ETSI: European telecommunications standards Institute; FCC: federal communications Commission). (Ø: Diameter).
From: Design of a textile-based UHF RFID sensor for high read range and multilevel diaper moisture sensing
Refs. | Dimension (mm3) | Frequency (MHz) | Materials | Flexible | Characteristics | Read Range (m) | Read Sensitivity | Cost | Seamlessly integrates with diaper |
|---|---|---|---|---|---|---|---|---|---|
15 (Ø) × 2 | 13.56 | Tissue paper Aluminium | No | Binary (Dry/Wet) Detection | 0.07 (dry) 0.04 (wet) @EIRP N.A. | N.A. | Low | Yes | |
90 × 20 × 0.9 | FCC: 902–928 ETSI: 865–868 | Denim Copper foil | Yes | Multilevel wetness detection | 6.0 (dry) 1.0 (wet) @EIRP (ETSI = 3.28 W, FCC = 4 W). | -20 dBm | Low | No | |
100 × 80 × 20 | 900 | Hydrogel Copper | Yes | Binary (Dry/Wet) Detection | 1.0 (wet) @EIRP N.A. | N.A. | Low | No | |
105 × 6 × 0.1 | 913 | Paper Aluminium | Yes | Binary (Dry/Wet) Detection | 4.4 (adult) (dry) 3.6 (baby) (dry) @EIRP 4 W | -22.1 dBm | Low | No | |
75.0 × 38.0 × 0.12 | 867 | Polyamide-based taffeta label fabric Silver Ink | Yes | Multilevel wetness detection | 0.5 (wet) @EIRP N.A. | -22.0 dBm | High | Yes | |
This work | 78 × 32 × 0.09 | 915 | Microfiber polyester Copper-nickel coated PET | Yes | Multilevel Wetness Detection | 12.1 (dry) 3.3 (wet) @EIRP 3.28 W | -21.85 dBm | Low | Yes |
