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 2800 nm
Sensitivity (nominal) 15µV/W/m2
Response Time (95%) 013 sec.
Directional Error (1000 W/m2 beam) ±20 W/m2
Range 0 to 2000 W/m2
Non-linearity (to 1000 W/m2) ±1%
Temperature Range -40 to +80° C
Temperature Dependence < ±0.1%/° C
Calibration Traceability WRR
Non Stability (drift) < ±1% per year
Cable Length 5 meter standard (longer lengths optional)