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SSR11 Pyranometer ISO First Class

The SSR11 pyranometer is suitable for measuring global short-wave solar irradiance incidenting a plane surface, offering a full 180 field of view (FOV). Capable of measuring up to two suns, 2000 W/m2, the SSR11 is also well suited for higher intensity indoors artificial lamp measurement applications. Employing entirely passive thermopile-based sensing technology, the SSR11 generates a low level DC millivolt output signal proportional to the solar short-wave flux received at the detector surface. The instrument design serves to reduce the possibility of wind related signal noise and thermal offset related error effects by employing a set (two) of precision ground and polished glass domes, resulting in improved measurement accuracy. Determining short-wave solar irradiance requires connection to either a data logger or digital voltmeter with a measurement resolution of ten micro-volts or better; simply divide the SSR11 millivolt output signal by the factory supplied calibration factor to arrive at irradiance in W/m2 units. Typical SSR11 measurement applications include scientific meteorological observations, building physics, climate and solar collector/PV panel efficiency testing. For conventional horizontal plane mounting applications requiring accurate leveling, the SSR11 is equipped standard with adjustable leveling feet and a bulls-eye bubble level. The SSR11 signal cable can be easily installed and replaced by the user, thus minimizing down-time and expense otherwise associated with instrument re-cabling by the manufacturer.


  • Agrometeorology
  • Climatology/Meteorology
  • Industrial Light Measurement and Process Control
  • Material Testing
  • Solar Collector and PV Panel Efficiency Validation         

ISO Classification
First Class

Spectral Range
305 to 2800nm

Sensitivity (nominal)

Response Time (95%)
013 sec.

Directional Error (1000 W/m2 beam)
20 W/m2

0 to 2000 W/m2

Non-linearity (to 1000 W/m2)

Temperature Range
-40 to +80C

Temperature Dependence
< 0.1%/C

Calibration Traceability

Non Stability (drift)
< 1% per year

Cable Length
5 meter standard (longer lengths optional)