Table 1 Summary of performance comparison
From: A customizable, low-power, wireless, embedded sensing platform for resistive nanoscale sensors
Specification | ||||||
|---|---|---|---|---|---|---|
This Work | ||||||
System | Supply [V] | 5 | 11 | 5 | 3.6 | 5 |
Connectivity | BLE/serial | I2C /serial | I2C/UART | BLE | BLE | |
Sensor material | CNT | MOS | NDIR for CO2 | MOX for O3 and CO2 | Electrochemical for NO2 | |
Range [ppm] | 0–0.2 | 0-0.2 | 0–50,000 | 0–0.2 | 0.01–50 | |
Response time [min.] | 12 | < 1 | < 3 | < 1 | <1.2 | |
Resolution [ppm] | 0.023a/0.052b (3σ LOD) | 0.001 (LDL) | + /−30 ± 3%ss | O3:0.004;CO2:64ss | ±0.02 | |
Temp./R.H. [°C/%] | 22 °C 0% R.H | 0 to 50 °C 5 to 95% R.H. | −10 to 60 °C 0 to 95% R.H. | −40 to 85 °C 10 to 95% R.H. | −30 to 60 °C 15 to 85% R.H. | |
Area [cm2] | 9.5 × 6.5 | 6 × 7.5 | 0.3 × 1.5 | – | – | |
Power [mW] | Avg. 60 @ 3 SPS | 2500–6000 | Avg. 125 | Avg. 180 | 175 | |
Sensor(s) | Detector type | CNT | Graphene | In2O3-rGO | SnO2-NW | Ag-S-rGO |
Limit of detection [ppb] | 23 (3σ)a | 100 | 50 | 100 | 500 | |
Detection principle | Resistive | Hall bar | FET | resistive | FET | |
Power [µW] | <0.025–0.5c | – | – | 20 | – | |
