LI190SB-L

Specifications

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Accurate, Versatile
Compatible with most Campbell dataloggers and wireless systems

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Technical Description

The LI190SB measures solar radiation with a silicon photovoltaic detector mounted in a cosine-corrected head. A shunt resistor in the sensor’s cable converts the signal from microamps to millivolts, allowing the LI190SB to be measured directly by a Campbell Scientific datalogger.

LI190SB accurately measures Photosynthetic Photon Flux Density (PPFD), which is the number of photons in the 400 to 700 nm waveband incident per unit time on a unit surface. Because PPFD describes photosynthetic activity, the LI190SB is ideal for growth chambers and greenhouses.

LI190SB-L Specifications

Light Spectrum Waveband: 400 to 700 nm
Calibration:
±5% traceable to the U.S. National Institute of Standards Technology (NIST)
Sensitivity:
Typically 5 μA per 1000 μmoles s^-1 m^-2
Linearity: Maximum deviation of 1%
up to 10,000 μmoles s^-1 m^-2
Shunt Resistor:
±15% over thermal conductivity range from 0.1 to 1.7 W m^-2 K^-1
Stability: < ±2% change over a 1 year period
Response Time: 10 μs
Temperature Dependence: 0.15% per °C maximum
Cosine Correction: Cosine corrected up to 80° angle of incidence
Operating Temperature: -40° to +65°C
Relative Humidity: 0 to 100%
Detector: High stability silicon photovoltaic detector (blue enhanced)
Sensor Housing: Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware
Diameter: 2.38 cm (0.94 in.)
Height: 2.54 cm (1.00 in.)
Weight: 28 g (1 oz)