Pyranometer
PULSONIC is offering different technology of pyranometer depending of the client's applications.
- Photo-diode
- Thermo-pile
Photo-diode Pyranometer
The pyranometer using photo-diode as a narrow frequency spectrum compare to thermo-pile. This pyranometer technology are mainly use in application that has no vocation for research or National Meteorology Network :
Photo-diode characteristics
| Parameters | Values |
|---|---|
| Measure range | 10-1300 W/m² |
| Accuracy | ±15% |
| Spectral range | 400-1100nm |
| Measure principle | Silicium poly cristallin photo-diode |
Thermo-pile pyranometer
The pyranometer using thermo-pile as a larger frequency spectrum and has an overall better accuracy.
The pyranometer are characterized by ISO 9060 Standard :
- Secondary Standard (Best accuracy)
- First Class
- Second Class (Lowest accuracy)
WMO-CIMO Guide is advising to use Secondary Standard pyranometer for research application.
Second class
The second class pyranometer are used in applications where photo-diode doesn't provide wide enough spectral measurement.
Specification
| Parameters | Values |
|---|---|
| Spectral range (50% points) | 300 to 2800nm |
| Sensitivity | 5 to 20 uV/W/m² |
| Response time (95%) | < 18 sec. |
| Zero offsets (a) thermal radiation (at 200 W/m²) | < 15 W/m² |
| Zero offsets (b) temperature change (5 K/h) | < 5 W/m² |
| Non-stability (change/year) | < 1% |
| Non-linearity (100 to 1000 W/m²) | < 1.5% |
| Directional response | < 20 W/m² |
| Spectral selectivity | < 3% |
| Temperature response | < 5% |
| Tilt response (0° to 90° at 1000 W/m²) | < 1% |
First Class
The first class pyranometer are used in high quality network observation system.
Specification
| Parameters | Values |
|---|---|
| Spectral range (50% points) | 285 to 2800nm |
| Sensitivity | 5 to 20 uV/W/m² |
| Response time (95%) | < 18 sec. |
| Zero offsets (a) thermal radiation (at 200 W/m²) | < 12 W/m² |
| Zero offsets (b) temperature change (5 K/h) | < 4 W/m² |
| Non-stability (change/year) | < 1% |
| Non-linearity (100 to 1000 W/m²) | < 1% |
| Directional response | < 20 W/m² |
| Spectral selectivity | < 3% |
| Temperature response | < 4% |
| Tilt response (0° to 90° at 1000 W/m²) | < ±1% |
Secondary Standard
The secondary standard pyranometer are mainly used in research field. Some applications require extremely high quality properties.
Specification
| Parameters | Values |
|---|---|
| Spectral range (50% points) | 285 to 2800nm |
| Sensitivity | 7 to 14 uV/W/m² |
| Response time (95%) | < 5 sec. |
| Zero offsets (a) thermal radiation (at 200 W/m²) | < 7 W/m² |
| Zero offsets (b) temperature change (5 K/h) | < 2 W/m² |
| Non-stability (change/year) | < 0.5% |
| Non-linearity (100 to 1000 W/m²) | < 0.2% |
| Directional response | < 10 W/m² |
| Spectral selectivity | < 3% |
| Temperature response | < 1% |
| Tilt response (0° to 90° at 1000 W/m²) | < 0.2% |
Our Automatic Weather Station (AWS) can easily integrate other types of sun radiation sensors. Please contact us for more offers.