Table 4.
Comparison table of recent moisture sensors.
| Work | Sensor Type by | Base Material | Advantages | Disadvantages | ||
|---|---|---|---|---|---|---|
| Powered | Sense Location | Sense Mechanism | ||||
| [1] | Active | Local | Resistive | Fabric | Accuracy | Expensive Requires power |
| [2] | Active | Local | Capacitive/Resistive | Diaper Foil | ||
| [3] | Passive | Remote (RF 13.56 MHz) | LC Resonance | Paper/Polyacrylate | Binary detection | |
| [22] | Passive | Remote (RF 14.00 MHz) | LC Resonance | Polyamide | Low cost | Large size |
| [23] | Passive | Remote (RF 35.75 MHz) | LC Resonance | PCB | Low efficiency | |
| [24] | Passive | Remote (RF 177.00 MHz) | LC Resonance | LTCC | Sensitivity | Versatility |
| This work | Passive | Remote (RF 8.20 MHz) | LC Resonance | Polyamide | Low cost | Versatility |