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Pyrheliometer
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MS-54
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The MS-54 Pyrheliometer is designed for unattended normal incidence direct solar radiation measurement research, from 0.2 to 4.0 µm. The MS-54 is intended for use with STR series EKO Sun Tracker. The MS-54 fully complies with the most current ISO and WMO performance criteria, for that of a First Class Normal Incidence Pyrheliometer. Every MS-54 is calibrated upon manufacture, and is supplied standard with a WRR (World Radiometric Reference) traceable calibration certificate. |
| Specificastions | |
ISO classification |
First Class |
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Maximum irradiance |
4000 W/m² |
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Spectral range |
200 - 4000 nm (50% points) |
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Sensitivity (nominal) |
5±0.25 µV/W/m² |
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Impedance (nominal) |
50 to 200 Ω |
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Response time (95%) |
7 sec. |
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Non-linearity |
±0.2% (0-1000 W/m²) |
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Temp. dependence |
±1.0% (-20 to +50°C) |
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Zero-offset due to temp. changes |
±3 W/m² at 5 K/h temp. change |
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Full opening view angle |
5° ±0.2° (acc. to WMO) |
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Slope angle |
1° ±0.2° (acc. to WMO) |
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Required tracking accuracy |
±0.5° from ideal |
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Operating temperature |
-40°C to +80°C |
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Traceability |
WRR |
MS-54 with STR-21
