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Solar Radiation Sensor


Solar Radiation Sensor,a precision pyranometer,measures global radiation, total solar radiation, direct beam and diffuse, incident on a horizontal surface is defined as global shortwave radiation, or shortwave irradiance (incident radiant flux), and is expressed in Watts per square meter .

The sensor’s transducer, which converts incident radiation to electrical current, is a silicon photodiode with wide spectral response. From the sensor’s output voltage, the console calculates and displays solar irradiance. It also integrates the irradiance values and displays total incident energy over a set period of time.

ISR01 Solar Radiation Sensor is a precision instrument that detects radiation at wavelengths of 300 to 1100 nanometers. The spectral response of the silicon photodiode detector is a good match to the spectrum of solar radiance.

Product Description

The outer shell shields the sensor body from thermal radiation and provides an airflow path for convection cooling of the body, minimizing heating of the sensor interior. It includes a cutoff ring for cosine response, a level indicator, and fins to aid in aligning the sensor with the sun’s rays. The space between the shield and the body also provides a run-off path for water, greatly reducing the possibility of rain- or irrigation-water entrapment. The diffuser is welded to the body for a weather-tight seal.It provides an excellent cosine response with spectral response of 400 to 1100 nm. The transducer is an hermetically-sealed silicon photodiode, included amplifier converts the transducer current into 0 to +2.5 VDC. Spring-loaded mounting screws, in conjunction with the level indicator, enable rapid and accurate levelling of the sensor. ISR01 measures total solar radiation by both direct and diffused sun irradiance Silicon photo detector provides accurate measurement of solar radiation .Diffuser element is used for accurate cosine response. Each sensor is calibrated against swissteco pyranometer. With spectral response of 400 to 1100 nm ISR01 is suitable for meteorological, agricultural and hydrological applications.
Inbuilt amplifier converts sensor’s current from 0-2.5VDC.Dome shaped housing protect water logging on top of sensor. ISR01 provides rapid deployment because of its small size and rugged design.
ISR01 is compatible with IDL-A and with other third party data loggers having analog input option.

Product Highlights
  • High stability silicon photovoltaic detector.
  • Excellent cosine response.
  • No routine adjustment or polar alignment.
  • Works at any latitude.
  • Dome-shaped head prevents water from accumulating on the sensor head.


Typical applications of silicon-cell pyranometers include incoming shortwave radiation measurement in agricultural, ecological, and hydrological weather networks, and solar panel arrays.