sp-110 pyranometer

SP-110 Pyranometer

The SP-110 is a low cost yet highly accurate self-poweredsensor with a millivolt output and exhibits excellent cosineresponse. The SP-110 is the first choice sensor for scientistswho want to measure global solar radiation.

The SP-110 incorporates a silicon-cell photodiode thatmeasures total shortwave radiation with a sensor housingdesign that features a fully potted, domed-shaped headmaking the sensor fully weatherproof and self-cleaning.

The SP-110 measures radiation between 380 and 1120nm.This shortwave radiation is an important component indetermining evapotranspiration rates, energy balance, netradiation as well as monitoring solar power panels.

The SP-110 is ideally supported by the LSM3 Light SensorMeter for Pyranometers for data logging and long termmonitoring.

Solar radiation at Earth’s surface is typically defined astotal radiation across a wavelength range of 280 to 4000nm (shortwave radiation). Total solar radiation, direct beamand diffuse, incident on a horizontal surface is defined asglobal shortwave radiation, or shortwave irradiance(incident radiant flux), and is expressed in Watts per squaremeter (Wm-2, equal to Joules per second per square meter).Pyranometers are sensors that measure global shortwaveradiation.

Apogee SP series pyranometers are silicon-cellpyranometers, and are only sensitive to a portion of thesolar spectrum, approximately 350 – 1100 nm(approximately 80% of total shortwave radiation is withinthis range). However, silicon-cell pyranometers arecalibrated to estimate total shortwave radiation across theentire solar spectrum. Silicon-cell pyranometerspecifications compare favourably to specifications forWorld Meteorological Organisation (WMO) moderate andgood quality classifications and specifications forInternational Organisation of Standardization (ISO) secondclass and first class classifications, but because of limitedspectral sensitivity, they do not meet the spectralspecification necessary for WMO or ISO certification.

Typical applications of silicon-cell pyranometers includeincoming shortwave radiation measurement in agricultural,ecological, and hydrological weather networks, and solarpanel arrays.

Apogee Instruments SP series pyranometers consist of acast acrylic diffuser (filter), photodiode, and signalprocessing circuitry mounted in an anodised aluminiumhousing, and a cable to connect the sensor to ameasurement device. Sensors are potted solid with nointernal air space and are designed for continuous totalshortwave radiation measurement on a planar surface inoutdoor environments. SP series sensors output an

analogue voltage that is directly proportional to totalshortwave radiation from the sun. The voltage signal fromthe sensor is directly proportional to radiation incident on aplanar surface (does not have to be horizontal), where theradiation emanates from all angles of a hemisphere.

Enabling better global research outcomes in soil, plant & environmental monitoring.www.ictinternational.com : sales@ictinternational.com.au : +612 6772 6770

SP-110 Pyranometer

SpecificationsSensitivity: 0.20 mV per W m-2

Calibration Factor: 5.0 W m-2 per mV (reciprocal of sensitivity)

Calibration Uncertainty: ± 5%

Measurement Repeatability: < 1%

Non-stability (Long-term Drift): < 2% per year

Non-linearity: < 1% (up to 1750 W m-2)

Response Time: < 1 ms

Field of View: 180°

Spectral Range: 360 nm to 1120 nm (wavelengths where response is 10 % ofmaximum)

Directional (Cosine) Response: ± 1% at 45° zenith angle± 5% at 75° zenith angle

Temperature Response: -0.04 ± 0.04% per °C

Operating Environment: -40 to 70°C, 0 to 100% relative humidity

Dimensions: 2.4 cm diameter and 2.8 cm height

Mass: 90g (with 5m of lead wire)

Power Supply: Self powered

Warranty: 4 years

Enabling better global research outcomes in soil, plant & environmental monitoring.www.ictinternational.com : sales@ictinternational.com.au : +612 6772 6770

SP-110 Pyranometer

Accessories

AA-100: Protective Carrying Case

Protective carrying case designed to transport and store Apogee meters, sensors,and accessories.

AL-100 Solar Sensor Leveling Plate

AL-100 Solar Sensor Leveling Plate

AL-120 Solar Mounting Bracket with Levelling Plate

AL-120 Solar Mounting Bracket with Levelling Plate

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Enabling better global research outcomes in soil, plant & environmental monitoring.www.ictinternational.com : sales@ictinternational.com.au : +612 6772 6770