280-SP Series Silicon Cell Pyranometers

Reference: 280-SP

For applications that don't call for the higher accuracy, and higher cost, of a thermopile pyranometer, the 280-SP Series silicon cell pyranometers are an excellent fit. They cost less and respond faster, although their error grows under cloudy skies.

Sensitive to shortwave radiation across 360-1120 nm, they are calibrated to estimate total shortwave radiation over the full solar spectrum. Each sensor combines a cast acrylic diffuser, a photodiode and signal processing circuitry potted solid inside an anodized aluminum housing.

What it measures

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280-SP

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Overview

Design features

Dome-shaped sensor head (diffuser and body) lets dew and rain run off, keeping the diffuser clean
Cosine correction for accurate readings even at low zenith levels
Rugged construction for continuous outdoor use in any climate
Low power draw and quick response
Optional in-line connector, 30 cm from the sensor head, for easier maintenance

Typical applications

Agriculture
Meteorology
Solar energy

Specifications

Spectral range: 360-1120 nm (wavelengths at which response is 10 % of maximum)
Cosine response: ± 5% at a 75° zenith angle
Calibration uncertainty: ± 5%
Non-linearity: under 1 % up to 2000 W m⁻²
Long-term drift: under 2% per year
Operating environment: -40°C to +70°C, 0-100% humidity; can be submerged to 30m in water
Cable: 5 meters (16.4 feet) of shielded twisted-pair wire as standard; extra cable in multiples of 5 m; TPR jacket (high water resistance, high UV stability, flexible in the cold); pigtail lead wires
Size: 28 mm high x 24 mm diameter
Weight: 140g for model 280-SP-214, 90 g for the others