Pyranometers / LI200X-L
This product is no longer available and has been replaced by: CS320. Some accessories, replacement parts, or services may still be available.
LI200X-L Silicon 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


Technical 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)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (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.

Related FAQs

Number of FAQs related to LI200X-L: 5

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  1. The information included on a calibration sheet differs with each sensor. For some sensors, the sheet contains coefficients necessary to program a datalogger. For other sensors, the calibration sheet is a pass/fail report.

  2. The LI190SB-L measures photosynthetically active radiation (PAR), a spectral range of solar radiation from 400 to 700 nm.  This is the energy that plants use during photosynthesis.  Measurements with the LI190SB-L are reported as photosynthetic photon flux density (PPFD). 

    The LI200X-L measures total solar radiation from 400 to 1100 nm. Measurements are usually reported in units of W/m2.  

  3. This depends on the information contained in the calibration sheet:

    • If the calibration sheet contains coefficient information, Campbell Scientific keeps a copy, and a replacement copy can be requested.
    • If the calibration sheet does not contain coefficients, Campbell Scientific does not keep a copy. It may be possible to contact the original manufacturer for a replacement copy.
  4. Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:

    • An –LC model has a user-specified cable length for connection to an ET107, CS110, or retired Metdata1.
    • An –LQ model has a user-specified cable length for connection to a RAWS-P weather station.

    If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field on the product’s Ordering tab. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.

    If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.

    • –ET models terminate with the connector for an ET107 weather station.
    • –ETM models terminate with the connector for an ET107 weather station, but they also include a special system mounting, which is often convenient when purchasing a replacement part.
    • –QD models terminate with the connector for a RAWS-F Quick Deployment Station.
    • –PW models terminate with the connector for a PWENC or pre-wired system.
  5. Many Campbell Scientific sensors are available with different cable termination options. These options include the following:

    • The –PT (–PT w/Tinned Wires) option is the default option and does not display on the product line as the other options do. The cable terminates in pigtails that connect directly to a datalogger.
    • In the –C (–C w/ET/CS110 Connector) option, the cable terminates in a connector that attaches to a CS110 Electric Field Meter or an ET-series weather station.
    • In the –CWS (–CWS w/CWS900 Connector) option, the cable terminates in a connector that attaches to a CWS900-series interface. Connection to a CWS900-series interface allows the sensor to be used in a wireless sensor network.
    • In the –PW (–PW w/Pre-Wire Connector) option, the cable terminates in a connector that attaches to a prewired enclosure.
    • In the –RQ (–RQ w/RAWS Connector) option, the cable terminates in a connector that attaches to a RAWS-P Permanent Remote Automated Weather Station.

    Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact an application engineer at Campbell Scientific for assistance.

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