This product is no longer available and has been replaced by: CS320. Some accessories, replacement parts, or services may still be available.
LI200X-L Silicone Pyranometer with Fixed Daylight Calibration
Services Available
Repair No
Calibration Yes
Free Support No


The LI200X, manufactured by LI-COR, is a pyranometer that monitors sun plus sky radiation. It connects directly to our dataloggers, and is used extensively in solar, agricultural, and meteorological applications.

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Benefits and Features

  • Compatible with most Campbell Scientific data loggers
  • Calibrated for the daylight spectrum (400 to 1100 nm)
  • Completion circuit in its cable standardizes calibration, allowing sensors to be interchanged without altering multiplier and offset values


Detailed Description

The LI200X uses a silicon photovoltaic detector mounted in a cosine-corrected head to provide solar radiation measurements. Calibrated against an Eppley precision spectral pyranometer (PSP), the LI200X accurately measures sun plus sky radiation for the spectral range of 400 to 1100 nm. Sensors calibrated to this spectral range should not be used under vegetation or artificial lights.

The LI200X includes an epoxy-encased completion circuit in its cable. This completion circuit standardizes the sensor's sensor's calibration, allowing individual sensors to be interchanged without altering multiplier and offset values.

The standard output is 0.005 mV per W m-2, which provides a signal of 5 mV in full sunlight (1000 W m-2). All of our dataloggers, except the CR200(X) series, can measure this output.


Light Spectrum Waveband 400 to 1100 nm
Accuracy Absolute error in natural daylight is ±5% maximum (±3% typical)
Sensitivity 0.2 kW m-2 mV-1
Linearity Maximum deviation of 1% up to 3000 W m-2
Shunt Resistor Adjustable, 40.2 to 90.2 ohm (factory set to the above sensitivity)
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 Range -40° to +65°C
The overmolding that protects the completion circuit in the cable may crack if the temperature drops below -40°C.
Relative Humidity Range 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)


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired)

Additional Compatibility Information


To ensure accurate measurements, the sensor should be leveled using a LI2003S leveling fixture, which incorporates a bubble level and three adjusting screws. The LI2003S leveling fixture mounts to a tripod or tower using the CM225 mount. For most applications, Campbell Scientific recommends attaching the CM225 to a CM202, CM204, or CM206 crossarm. The CM225 can also be attached to a tripod or tower mast.

Data Logger Considerations

One differential analog input channel per probe is required.

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