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.
The "-L" on a product model indicates that the cable length is specified at the time of order.
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.
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.
One differential analog input channel per probe is required.
Number of FAQs related to LI200X-L: 6
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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.
This depends on the information contained in the calibration sheet:
The information included on a calibration sheet differs with each sensor. For some sensors, the sheet contains coefficients necessary to program a data logger. For other sensors, the calibration sheet is a pass/fail report.
Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places in the Ordering information area of the sensor product page:
If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.
All of the other cable termination options, if available, are listed on the Ordering information area of the sensor product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown in the Ordering information area of the 034B-L product page.
Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model.
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:
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 in the product’s Ordering information. 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.
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
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 Campbell Scientific for assistance.