| SU-100-SS | SU-420 | SU-200-SS | SU-202-SS | SU-205-SS | |
|---|---|---|---|---|---|
| Power Supply | — | — | — | 3.3 to 24 V DC | 5.5 to 24 V DC |
| Output (Sensitivity) | 0.20 mV per µmol m-2 s-1, 0.61 mV per W m-2 | — | 0.01 mV per W m-2 | 25 mV per W m-2 | 50 mV per W m-2 |
| Resolution | — | 0.1 W m-2 | — | — | — |
| Calibration Factor (Reciprocal of Output) | 5.0 µmol m-2 s-1 per mV, 1.65 W-2 per mV | Custom for each sensor and stored in firmware | 100 W m-2 per mV | 0.04 W m-2 per mV | 0.02 W m-2 per mV |
| Calibration Uncertainty | ± 10 % | ± 10 % | ± 5 % | ± 5 % | ± 5 % |
| Current Draw | — | 61 mA (when logging) | — | Maximum of 10 µA | Maximum of 10 µA |
| Output Range | — | — | 0 to 1 mV | 0 to 2500 mV | 0 to 5000 mV |
| Measurement Range | — | — | 0 to 100 W m-2 | 0 to 100 W m-2 | 0 to 100 W m-2 |
| Measurement Repeatability | Less than 1 % | Less than 1 % | Less than 0.5 % | Less than 0.5 % | Less than 0.5 % |
| Long-term Drift (Non-stability) | Less than 3 % per year | Less than 3 % per year | Less than 2 % per year | Less than 2 % per year | Less than 2 % per year |
| Non-linearity | Less than 1 % (up to 300 µmol m-2 s-1) | Less than 1 % (up to 300 µmol m-2 s-1) | Less than 1 % | Less than 1 % | Less than 1 % |
| Response Time | Less than 1 ms | Software updates every second | Less than 1 ms | Less than 1 ms | Less than 1 ms |
| Field of View | 180° | 180° | 180° | 180° | 180° |
| Spectral Range | 250 to 400 nm | 250 to 400 nm | 310 nm to 400 nm | 310 nm to 400 nm | 310 nm to 400 nm |
| Directional (Cosine) Response | ± 10 % at 75 ° zenith angle | ± 10 % at 75 ° zenith angle | ± 2 % at 45°, ± 5 % at 75° | ± 2 % at 45°, ± 5 % at 75° | ± 2 % at 45°, ± 5 % at 75° |
| Temperature Response | Approximately 0.1 % per C | Approximately 0.1 % per C | Less than -0.1 % per C | Less than -0.1 % per C | Less than -0.1 % per C |
| Operating Environment | -40 to 70 C, 0 to 100 % relative humidity | -40 to 70 C, 0 to 100 % relative humidity | -40 to 70 C, 0 to 100 % relative humidity | -40 to 70 C, 0 to 100 % relative humidity | -40 to 70 C, 0 to 100 % relative humidity |
| Dimensions | — | — | 24 mm diameter, 37 mm height | 24 mm diameter, 37 mm height | 24 mm diameter, 37 mm height |
| Mass (with 5 m of cable) | 75 g | 90 g | 100 g | 100 g | 100 g |
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