The MS-802 Secondary Standard Pyranometer is the ultimate reference sensor to measure global solar irradiance with the highest precision. Its robust brass mechanical construction makes it a durable sensor suitable to be used in harsh environments. The MS-802 is used as standard for PV research and climatology studies around the world.
In combination with a Sun tracker (STR-series) or manual shading ring (RSR-01), respectively the Global Normal Incidence (GNI) and Diffuse (DHI) irradiance can be measured. The MS-802F is a MS-802 with integrated ventilator unit to improve the performance under various environmental conditions (prevents or minimizes the effect of dew, rain, snow, ice and dust).
| Specifications (Typical) | MS-802 / MS-802F |
| ISO 9060 classification | Secondary Standard |
| Response time 95% (sec) | < 5 |
| Zero offset - Thermal radiation (200W/m²) | < 6 W/m² |
| Zero offset - Temperature change (5K/hr) | < 2 W/m² |
| Non-stability (change/year) | < 0.5 % |
| Non-linearity (at 1000W/m²) | < 0.2 % |
| Directional response (at 1000W/m²) | < 10 W/m² |
| Spectral selectivity (0.35-1.5µm) | < 1 % |
| Temp. response (for 50°C band) | < 1 % |
| Tilt response (at 1000W/m²) | < 0.2 % |
| Sensitivity (µV/W/m-2) | Approx. 7 |
| Impedance (Ω) | Approx. 500 |
| Operating temperature range (°C) | - 40 to +80 |
| Irradiance range (W/m2) | 0 - 4000 W/m2 |
| Cable length | 10m |
| Wavelength range | 285 to 3000 nm |