The SL-610-SS Downward-Looking Pyrgeometer provides reliable measurement of outgoing longwave radiation using a thermopile detector and thermistor. Its rugged, self-cleaning design and IP68 marine-grade connector ensure durable outdoor performance, making it ideal for agricultural, ecological, hydrological, and renewable energy monitoring applications.
Specifications
| Specification | Details |
|---|---|
| Sensitivity | 0.12 mV per W m⁻² (variable from sensor to sensor, typical value listed) |
| Calibration Factor (Reciprocal of Sensitivity) | 8.5 W m⁻² per mV (variable from sensor to sensor, typical value listed) |
| Calibration Uncertainty | ±5 % |
| Measurement Range | -200 to 200 W m⁻² (net longwave irradiance) |
| Measurement Repeatability | Less than 1 % |
| Long-term Drift | Less than 2 % change in sensitivity per year |
| Non-linearity | Less than 1 % |
| Detector Response Time | Less than 0.5 seconds |
| Field of View | 150° |
| Spectral Range | 5 to 30 µm |
| Temperature Response | Less than 5 % from -15 to 45 °C |
| Window Heating Offset | Less than 10 W m⁻² |
| Zero Offset B | Less than 5 W m⁻² |
| Tilt Error | Less than 0.5 % |
| Uncertainty in Daily Total | ±5 % |
| Temperature Sensor | 30 kΩ thermistor, ±1 °C tolerance at 25 °C |
| Output from Thermistor | 0 to 2500 mV (typical, other voltages can be used) |
| Input Voltage Requirement for Thermistor | 2500 mV excitation (typical, other voltages can be used) |
| Heater | 780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC |
| Dimensions | 27.5 mm height, 23.5 mm diameter |
| Mass | 100 g |
| Warranty | 4 years against defects in materials and workmanship |
| Manufactured | Assembled in the USA |
Hydrological Weather
Agricultural Monitoring
Environmental Monitoring
Ecological Research
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