The SLP02 pyranometer is suitable for measuring global short-wave solar irradiance incidenting a plane surface, offering a full 180° field of view (FOV). Suitable for both indoor and outdoor applications, the SLP02 has a maximum measurement range of two suns, 2000 W/m<sup>2</sup>. Employing entirely passive thermopile-based sensing technology, the SLP02 generates a low level DC millivolt output signal proportional to the solar short-wave flux received at the detector surface. Contrary to competing low cost photodiode type and 'black & white' model pyranometers that suffer from long-term stability and spectral selectivity related error effects, the SLP02 offers a spectrally flat/non-selective response across the entire solar spectrum for improved measurement accuracy and long-term stability. 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 SLP02 millivolt output signal by the factory supplied calibration factor to arrive at irradiance in W/m2 units. Typical SLP02 measurement applications include meteorological observations, building physics, climate and solar collector/PV panel efficiency testing. For conventional horizontal plane mounting applications requiring accurate leveling, the SLP02 is equipped standard with adjustable leveling screws and a bulls-eye bubble level. The SLP02 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 Second Class
Spectral Range 305 to 2800 nm
Sensitivity (nominal) 15µV/W/m2
Response Time (95%) 18 sec.
Directional Error (1000 W/m2 beam) ±25 W/m2
Range 0 to 2000 W/m2
Non-linearity (to 1000 W/m2) ±2.5%
Temperature Range -40 to +80° C
Temperature Dependence < ±0.1%/° C
Calibration Traceability WRR
Non Stability (drift) < ±1% per year
Heating Power 1.6 Watt, @ 12 VDC
Cable Length 5 meter standard (longer lengths optional)