This product is not available for new orders. We recommend ordering: LI190R-L.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | Yes |
| Free Support | No |
Overview
The LI190SB, manufactured by LI-COR, is a quantum sensor that accurately monitors Photosynthetic Photon Flux Density (PPFD) in both natural and artificial light. It connects directly to our data loggers and is ideal for growth chambers and greenhouses.
Read MoreBenefits and Features
- 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
Images
Detailed Description
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 data logger.
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.
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Data Loggers
| Compatible | Note | |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000 (retired) | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
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.
Specifications
| 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) |
Related Documents
Product Brochures
Manuals
FAQs for
Number of FAQs related to LI190SB-L: 8
Expand AllCollapse All
-
The CDM-VW300 offers two channels for simultaneous reading of two vibrating wire sensors, whereas the CDM-VW305 offers eight channels for simultaneous measurements. Other than the number of channels supported, both models operate identically.
-
These devices work with vibrating wire strain gages, load cells, pressure transducers, crackmeters, and tiltmeters. Any standard, single-coil circuit vibrating wire sensor should work with these devices.
-
Yes. When more than eight channels are needed in a system, multiple CDM-VW300-series devices can be connected to the same data logger.
- Each CDM-VW300 device provides two terminals.
- Each CDM-VW305 device provides eight terminals.
Any combination of CDM-VW300 and CDM-VW305 devices can be used to achieve the desired number of total terminals.
The list below, ordered by data logger and measurement rate, indicates the maximum number of supported terminals:
- CR3000, 100 Hz: 8 terminals
- CR3000, 50 Hz: 24 terminals
- CR3000, 20 Hz: 48 terminals
- CR1000, 100 Hz: not supported
- CR1000, 50 Hz: 8 terminals
- CR1000, 20 Hz: 32 terminals
- CR800-series, 100 Hz: not supported
- CR800-series, 50 Hz: 8 terminals
- CR800-series, 20 Hz: 32 terminals
-
The frequency outputs generated by the CDM-VW300 or CDM-VW305 can be scaled with known sensor response functions, which are provided by the manufacturer of the sensor. These frequency conversions are used to obtain measurement outputs expressed in the desired engineering units.
-
To communicate with CDM devices using the CPI protocol, the CR3000, CR1000, CR850, and CR800 dataloggers require an SC-CPI device. Only one SC-CPI device per data logger is required. It is expected that the design of future Campbell Scientific data logger products will work with CPI-based modules directly.
-
Yes. Specific types of sensor measurements can be examined and evaluated before the system is deployed to a field site. A data logger is not used for this type of evaluation. Connect the CDM-VW300-series device directly to a computer using a USB cable. Using DVWTool software (specialized software included with the CDM-VW300 or CDM-VW305), the outputs of the attached vibrating wire sensors can be observed, and the CDM device can be configured appropriately.
-
CDM-VW300-series devices can measure vibrating wire sensors at the following rates: 1 Hz, 20Hz, 50Hz, 100Hz, 200Hz, and 333.3 Hz. CDM-VW300-series devices are designed for measurement periods of 1 s or less.
-
The communications protocol used by CDM devices is the CAN Peripheral Interface (CPI), which includes methods that are proprietary to Campbell Scientific.