Table 5.
Humidity sensor characteristics found in literature [75].
| Material | Type | Max. Sensitivity | Max. Hysteresis | Application |
|---|---|---|---|---|
| Wheat gluten (film) [75] | Natural polymer | 162.0 ± 0.6 fF/%RH between 90% and 95% RH | 7% at 90% RH | Agrifood sector-Passive RFID |
| Anodic aluminum oxide [76] | Oxide | 483 fF/%RH | 30% at 92% RH | Humidity sensors |
| Polyethylene-naphthalate and polyimide foils [77] | Synthetic polymer | 21 fF/%RH | - | Intelligent RFID |
| Polyimide [78] | Synthetic polymer | 4.5 fF/%RH | 10% at 50% RH | Humidity sensor for RFID for monitoring environmental humidity |
| Cellulose acetate butyrate [79] | Synthetic polymer | 1.5 ± 0.03 fF/%RH | 20% at 20% RH and 30% RH | Low cost sensor arrays and disposable sensing platforms |
| Porous aluminum oxide [80] | Oxide | 312.5 fF/%RH | - | - |
| Polyphenylacetylene (PPA) [81] | Synthetic polymer | 10 fF/%RH | - | - |
| Anodic Aluminum oxide [82] | Oxide | 4200 fF/%RH | 16.5% at 70% RH | Humidity sensors |
| Cerium(IV) oxide [83] | Oxide | 111 pF/%RH | 1% at 45%RH | Humidity sensors |