LI190R-L Quantum (PAR) Sensor

Accurate, versatile, compatible with most Campbell Scientific data loggers

The LI190R Quantum Sensor, manufactured by LI-COR, 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. It uses 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 these sensors to be measured directly by a Campbell Scientific data logger.

Category:

The LI190R 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 LI190R to be measured directly by a Campbell Scientific data logger. The LI190R 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 LI190R is ideal for growth chambers and greenhouses.

Benefits and Features

    • Ideal for growth chambers and greenhouses
    • Measures photosynthetic photon flux density (PPFD) in both natural and artificial light
    • Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
Sensor Silicon photovoltaic detector mounted in a cosine-corrected head
Measurement Description Measures photosynthetic photon flux density (PPFD) in both natural and artificial light
Spectral Range 400 to 700 nm
Calibration ±5% traceable to the U.S. National Institute of Standards Technology (NIST)
Sensitivity Typically 5 to 10 μA per 1000 μmoles s-1 m-2
Linearity Maximum deviation of 1% (up to 10,000 μmole s-1 m-2)
Shunt Resistor 604 Ω, 0.1%, 25 ppm
Long-Term Stability < ±2% change over a 1 year period
Response Time < 1 μs
Temperature Dependence 0.15% per °C (maximum)
Cosine Correction Cosine corrected up to 82° angle of incidence
Operating Temperature Range -40° to +65°C
Relative Humidity Range 0 to 100% (non-condensing)
Detector Description High-stability silicon photovoltaic (blue enhanced)
Sensor Housing Description Weatherproof anodized aluminum case with acrylic diffuser and stainless-steel hardware; O-ring seal on the removable base and cable assembly
Diameter 2.36 cm (0.93 in.)
Height 3.63 cm (1.43 in.)
Weight 84 g (2.96 oz)

Brochures: LI190R Quantum Sensor

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Manuals: LI190R Quantum Sensor

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