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| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SM500 / SM600 |
| Temperature Range | –60 to +80 °C |
| Temp Accuracy | ±0.2 °C |
| Temp Drift | <0.02 °C/year |
| Temp Repeatability | <0.01 °C |
| Temp Response Time | 7 s |
| RH Range | 0–95 %RH |
| RH Accuracy | ±3 % @ 20–80 %RH |
| CO₂ Range | 0–2000 ppm |
| CO₂ Accuracy | ±50 ppm + 2 % of reading |
| CO₂ Response Time | 105 s |
| Barometric Pressure Range | 70–110 kPa |
| Spectral Range (SM500) | 389–692 nm |
| Spectral Range (SM600) | 383–757 nm |
| PAR/ePAR Range | 0–4000 µmol·m⁻²·s⁻¹ |
| Calibration Uncertainty | ±5 % |
| Long-term Instability | <2 %/year |
| Measurement Repeatability | <0.5 % |
| Field of View | 180° |
| Directional Response Error | ±5 % @ 75° zenith angle |
| Azimuthal Error | <0.5 % |
| Tilt Error | <0.5 % |
| Nonlinearity | <1 % |
| Sensor Response Time | 1 ms |
| Temp Coefficient | –0.11 % ±0.04 %/°C |
| Daily Integral Uncertainty | <5 % |
| Power Supply | 5–30 V DC |
| Power Consumption | 1.1–1.5 W |
| Data Storage | 9 months of 1-minute intervals |
| Output Interfaces | Modbus RTU (RS-232 & RS-485) and Bluetooth 5.0 |
| Operating Environment | –40 to +60 °C, 0–100 %RH |
| Enclosure Material | White ASA plastic |
| IP Rating | IP53 |
| Weight | 392 g |
| Dimensions | Ø105 mm × H157 mm |
| Cable Length | 5 m |
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