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Silicon Pyranometer

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Silicon Pyranometer

    Designed for field measurements in solar, agricultural, meteorological, and hydrological studies
    • Used extensively in solar energy studies for site evaluations and monitoring, passive system analysis, irrigation scheduling and other environmental studies.
    • Patterned after the work of Kerr, Thurtell and Tanner, and calibrated against Eppley PSP under natural daylight conditions
    • Features a silicon photovoltaic detector mounted in a fully cosine-corrected miniature head
    • Can be mounted in any plane without affecting performance
    • In clear unobstructed daylight conditions compares favorably with first class thermopile type pyranometers, but is priced at a fraction of the cost
    • Spectral response does not cover full range of solar spectrum (error induced – <±5% – under most conditions of natural daylight)
    • Includes a millivolt adapter (604 precision resistor) to convert milliamp output to millivolts
    • Includes anodized aluminum base with stainless steel leveling screws and a weatherproof spirit level
    • Should only be used to measure unobstructed daylight (conditions of calibration). Not to be used under vegetation, artificial lights, in green houses, or for reflected solar radiation.
    • Crop management
    • Sky radiation
    • Global radiation
    • Irrigation control

    • Range
    400 to 1100 nm
    • Accuracy
    Calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Error under most of these conditions is < 5%, typical ±5%.
    • Sensitivity
    Typically 90 µA per 1000 W/m2
    • Linearity
    Maximum deviation of 1% up to 3000 W/m2
    • Stability
    < ± 2% change over one-year period
    • Response Time
    10 µs
    • Temperature Dependence
    ± 0.15% per °C maximum
    • Cosine Correction
     Cosine corrected up to 80° angle of incidence
    • Azimuth
     < ±1% error over 360° at 45° elevation
    • Tilt
    No error induced from orientation
    • Operating Temperature
    -40°C to +65°C (-40°F to +149°F)
    • Relative Humidity
    0% to 100% RH
    • Detector
    High stability silicon photovoltaic detector (blue enhanced)
    • Sensor Housing
    Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware
    • Size
    2.38 cm Dia x 2.54 cm H (0.94 in. x 1.0 in.)
    • Weight
    28 g (1 oz)
    • Cable Length
    3m (10ft) standard

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