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Radiometer Applications

  • Instruments and analyzers for DNI measurements with a pyrheliometer

    Solar Direct Normal Irradiance (DNI) represents the direct solar component and contains about 80% of the total solar energy budget on earth. Outside the atmosphere (AM0) the solar irradiance is considdered as a constant (1367 W/m2) that slightly fluctuates with a 11 year cycle. The DNI at the earth surface is highly variable due to the atmospheric conditions (clouds, aerosols, water vapor and molecules).

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

  • Instruments and analyzers for accurate solar radiation measurements

    Conducting reliable and accurate solar radiation measurements requires some knowledge and attention: think of environmental influences (wind, rain/snow, soling), re-calibration (bi-annually), not to mention data processing, spectral effects, etc. Essentially, accurate broadband solar radiation measurements are obtained using two components: a suitable set of pyranometers, including an optional pyrheliometer (DNI sensor) with sun tracker, and an adequate data logger.

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

  • Instruments and analyzers for solar radiation measurements in PV applications

    Solar radiation is not only the driving force behind the Earth’s weather phenomena, it also drives photovoltaic energy production. One day of solar energy received by the Earth exceeds the amount of worldwide energy consumption per year. Exploring this merely inexhaustible source of energy - either by direct transformation of radiant energy into electricity or by indirect energy production via wind, waves, etc. - seems to be the obvious way to go. In this context solar radiation measurements are of primary...

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

  • Instruments and analyzers for measuring spectral irradiance

    Spectral irradiance is the irradiance of a surface per unit frequency or wavelength. spectral irradiance of a wavelength spectrum is measured per watts per square metre per nanometre (W·m−2·nm−1). Spectroradiometers are devices designed to measure the spectral power distribution of a source. From the spectral power distribution, the radiometric, photometric, and colorimetric quantities of light can be determined in order to measure, characterize, and calibrate light sources for various...

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

  • Instruments and analyzers for spectral DNI measurements

    Where the pyrheliometer is most suitable to quantify the total DNI of the solar spectrum. The spectroradiometer gives details about the energy distribution which is important for PV or CPV cell research. The solar spectrum wil change with the angle of incidence and its path through the atmosphere. Photons wil be reflected, scattered or absorbed. Big absorbers of infrared irradiance are water vapor, carbon dioxide, and ozon.

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

  • Combined photo-radiometric probe for Museum & Metal Industry

    The combined photo-radiometric probe LP471P-A measures the two parameters of principal interest in the field of lighting, namely the ILLUMINATION (lux) and UVA IRRADIANCE (W/m2). The probe is composed by a luxmeter and an UVA radiometer. The signals of the two sensors are read and processed at the same time to visualize the relation between the two quantities expressed in µW/lumen. The two sensors are equipped with a diffuser for the correct measure according to the cosine law. The probe LP471P-A is particularly...

    By Delta OHM - member of the GHM GROUP based in Caselle di Selvazzano, ITALY.

  • Instruments and analyzers for DNI measurements at CPV sites

    Concentrating Photovoltaics (CPV) is driven by only direct solar radiation. To quantify the energy efficiency of a CPV system the total DNI and direct spectral solar irradiance, called spectral DNI, can be measured. Solar sensors are crucial during the phase of development and operation. Even at high sunny places, the composition and variability of the atmosphere strongly affects the solar spectral distribution and will impact on the energy yield and the decision on which cell type to use. The pyrheliometer in...

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

  • Instruments and analyzers for spectral irradiance portable solutions

    Reflection and transmission measurements on materials, vegetation, water or atmosphere give valuable information about biological, physical and chemical processes. Processes driven by solar radiation, in particular bands of the spectrum through the so called action spectra, can be analysed or quantified with a sensor senitive in the particular spectral band. The MS-720 portable spectroradiometer gives total freedom to be used in different applications and range of the spectrum between 350 - 1050 nm.

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

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