LI190R-L

Name: LI190R-L
Brand: Campbell Scientific
SKU: 31982
Availability: Discontinued

Quantum (PAR) Sensor

LI190R-L

Retired

Quantum (PAR) Sensor

No longer available to order

This product is retained for service, documentation, and compatibility information.

Replaced by

CS310
Quantum Sensor

Model:: LI190R-L
Item Number:: 31982
Warranty:: 1 year

Overview

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.
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Key Advantages

Accurate, Versatile
Compatible with most Campbell Scientific data loggers

Technical Description

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.

Product Notes

requires LI2003S

Benefits

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

Specifications

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)

Accessories

(3)

Common Accessories

(3)

Replacement Parts

(1)

32217
LI190R Replacement Sensor Head
The 32217 Replacement Sensor Head has a different calibration value than what is presently used in the field and what is written on the sensor cable. Remember to update your program with the new multiplier to match the new head. When replacing the sensor head, do not leave the bottom of the sensor assembly uncovered for long periods in the field. If the sensor head cannot be swapped out immediately, cover the sensor base using pn 31977 Sensor Base Cover until a new sensor head can be installed.
Orderable

Services

(1)

16561
LI-COR Sensor Calibration with Data
The response of the LI190R sensor to solar radiation is calibrated at LI-COR. If LI-COR repairs the housing, cable, or photodiode, additional repair charges will apply. All factory calibrations require an RMA (Return Material Authorization).
Orderable

Compatibility

Mounts

To ensure accurate measurements, the sensor should be leveled using an LI2003S leveling fixture, which incorporates a bubble level and three adjusting screws. The LI2003S leveling fixture mounts to a tripod using the 015ARM or to a crossarm using the CM225 mount. These sensors should be mounted away from all obstructions and reflective surfaces that might adversely affect the measurement.