Table 3.
Comparison among LC type sensor for humidity monitoring. * Distance between reader and tag antennas. Temp. stands for Temperature.
| Reference | Fabrication Technology | Materials | Area (cm2) | Sensitivity (kHz/%RH) | Range RH (%) | Distance * (mm) | Temp. (°C) |
|---|---|---|---|---|---|---|---|
| Deen et al. 2014 [36] | Plasma enhanced Chemical Vapour Deposition | Graphene, Cu | <1 | 5.7 | 1–97 | -- | 23 |
| Zang et al. 2014 [37] | Spin-coating, patterning | Polyimide, Al | <1 | 65 | 10–95 | 0 | 25 |
| Zang et al. 2015 [9] | CMOS technology and standard PCB process | GO, Cu | <1 | −18.75 | 15–95 | -- | 25 |
| Feng et al. 2015 [38] | Inkjet printing | Paper, polyimide, PET | 8 | 370 | 20–90 | -- | 25 |
| Wang et al. 2012 [21] | Dry-phase milling process, screen printing | Polyelectrolyte, Ag, carbon | 100 | −1.06 | 30–90 | 0 | 23 |
| Fernandez-Salmeron et al. 2015 [20] | Screen printing, inkjet printing | Polyimide, Ag | 40 | −3.7 | 15–95 | -- | 10–55 |
| This work | Screen printing, inkjet printing | Polyimide, Ag | 40 | −2.60 to −0.20 | 20–80 | 10–20 | 10–55 |