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| Brand | Apogee Instruments |
|---|---|
| Origin | USA |
| Model | PS-300 |
| Spectral Range | 220–1100 nm |
| Wavelength Resolution | 1.5 nm |
| Detector | 2048-pixel CCD |
| Grating | Holographic, aberration-corrected, 590 g/mm |
| A/D Converter | 16-bit |
| Signal-to-Noise Ratio | 1000:1 |
| Stray Light | ≤0.02% @ 435 nm, ≤0.2% @ 200 nm |
| Measurement Repeatability | <1% |
| Irradiance Calibration Uncertainty | ±10% (300–1000 nm) |
| Cosine Response Error | ±5% up to 80° zenith angle |
| Integration Time | 1 ms – 65 s |
| Interface | USB 2.0 |
| Power | 5 VDC, 100 mA (bus-powered) |
| Operating Temperature | 0–60 °C |
| Fiber Optic Cable | 2 m armored silica fiber |
| Dimensions | 69 × 100 × 150 mm |
| Weight | 900 g |
| Brand | Kipp & Zonen |
|---|---|
| Origin | Netherlands |
| Model | SGR3 |
| Spectral Range | 4.4–50 µm |
| Response Time | <18 s |
| Zero Offset (B) | <5 W/m² |
| Temperature Dependence of Sensitivity (−20 to +50 °C) | <3% |
| Operating Temperature Range | −40 to +80 °C |
| Field of View | 150° |
| Analog Output | 4–20 mA or 0–1 V per W/m² |
| Window Heating Offset | 15 W/m² |
| Power Supply | 5–30 VDC |
| Communication Interface | RS-485 Modbus® |
| Desiccant Replacement Interval | ≥10 years |
| Directional Error | <5 W/m² |
| Temperature Correction Range | −40 to +80 °C |
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