Table 1 Parameters of environmental sensors.
Sensor | Type | Measuring range | Precision | Output signal |
|---|---|---|---|---|
Air temperature and humidity sensor | DB-171 | Temperature: -40 ~ 120℃ Humidity: 0 ~ 100%RH | ± 0.1℃ ± 1.0% RH | 4–20 mA |
CO2 sensor | EE820 | 0 ~ 2000 PPM | ± 50 PPM | 4–20 mA |
Light sensor | TBQ-6 | 0 ~ 200 Klux | ± 0.02 Klux | 4–20 mA |
Soil sensor | 5TE | Temperature: -40 ~ 60℃ Humidity: 0 ~ 80% VWC Electrical conductivity:0 ~ 23 dS/m | ± 0.1℃ ± 0.08%VWC 0.01 dS/m | Digital signal |
