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LI190SB-L Sensor quântico LI-COR
Services Available
Repair Yes
Calibration Yes
Free Support Yes

Visão Geral

LI190SB é um sensor quântico que monitora com precisão Densidade Fotossíntética de Fótons (PPFD), tanto em luz natural quanto artificial. Conecta-se diretamente aos nossos dataloggers e é ideal para câmaras de cultivo e estufas.

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Benefícios e Características

  • Compatible with most Campbell Scientific data loggers
  • 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

The "-L" on a product model indicates that the cable length is specified at the time of order.

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Descrição Técnica

The LI190SB 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 LI190SB to be measured directly by a Campbell Scientific datalogger.

LI190SB 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 LI190SB is ideal for growth chambers and greenhouses.

 

Especificações

Light Spectrum Waveband 400 to 700 nm
Calibration ±5% traceable to the U.S. National Institute of Standards Technology (NIST)
Sensitivity Typically 5 μA per 1000 μmoles s-1 m-2
Linearity Maximum deviation of 1% up to 10,000 μmoles s-1 m-2
Shunt Resistor ±15% over thermal conductivity range (from 0.1 to 1.7 W m-2 K-1)
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 -40° to +65°C
Relative Humidity 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)

Compatibilidade

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

Dataloggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6
CR800
CR850
CR9000 (retired)
CR9000X

Additional Compatibility Information

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 or tower using the CM225 mount. The LI190SB should be mounted away from all obstructions and reflective surfaces that might adversely effect the measurement.

Data Logger Considerations

The LI190SB requires one differential analog input channel per probe.

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Perguntas Frequentes Relacionadas

Number of FAQs related to LI190SB-L: 8

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  1. This version is purchased directly from LI-COR and will not work directly with Campbell Scientific data loggers without modifications.

  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. 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.

  4. 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.
  5. 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 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.

    • –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.
  6. 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:

    • Model number
    • Cable Termination Options list

    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. 

  7. 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 Campbell Scientific for assistance.

  8. To incorporate a sensor that is compatible with wireless sensor interfaces into a wireless network, a CWS900-series wireless sensor interface is needed, as well as an A205 CWS-to-PC interface to configure it.