Table 3.
Comparison with published works.
| Reference | Sensor Type | Tag Size | Response Time | Substrate | Integrated with Antenna | Identification Capability |
|---|---|---|---|---|---|---|
| [10] | Humidity, Resistive type | 2.9 mm × 0.6 mm | More than 60 min | Paper | No | No |
| [11] | Humidity, Resistive type | 188 mm × 9 mm | 20–100 min | Paper | Yes | No |
| [12] | Gas (Ammonia & Nitrogen Oxide), Resistive type | 118 mm × 27 mm | - | Paper | Yes | No |
| [13] | Gas (Hydrogen Sulfide), Resistive type | 20 mm × 11 mm | Approx. 20 min | Paper | No | No |
| [14] | Humidity, Capacitive type | Sensor area is 200 mm2 | 4–11 min | Polyimide and Polyethersulphone | No | No |
| [15] | Humidity, Capacitive type | 12 mm × 8 mm | Approx. 24 s | PET | No | No |
| [16] | Humidity, Capacitive type | 6.3 mm × 1.85 mm | 5–6 min | Polyimide | No | No |
| [17] | Humidity, With both resistive and capacitive measurements | 5.4 mm × 5.4 mm | Less than 20 s | Polyimide | No | No |
| [18] | Humidity, Capacitive type | 12 mm × 12 mm | Approx. 20 min | PET | No | No |
| This work | Dual functionality Humidity & Gas (Hydrogen Sulfide), Resistive type | 45.75 mm × 20 mm | 3 min | Paper | Yes | Yes |