Kompatibel mit fast allen Datenloggern von Campbell Scientific
Überblick
Der LI190R Quantum Sensor, hergestellt von LI-COR, misst die photosynthetisch aktiven Photonen (PPFD), also praktisch die Anzahl von Photonen im Wellenlängenbereich von 400 bis 700 nm, die in einer bestimmten Zeit auf eine definierte Oberfläche treffen. Der Sensor verwendet eine Silicon-Photodiode in einem cosine-corrected Gehäuse verbaut ist. Ein Widerstand im Kabel dees Sensors konvertiert das Signal von Mikroampere zu Millivolt, so dass die Sensoren direkt an einem Campbell Scientific-Datenlogger angeschlossen werden kann.
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Funktionen und Vorteile
- Ideal für Gewächshäuser und
- Misst PAR (PPFD) in natürlichem und künstlichen Licht
Bilder
Technische Beschreibung
The LI190R 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 LI190R to be measured directly by a Campbell Scientific data logger. The LI190R 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 LI190R is ideal for growth chambers and greenhouses.
Spezifikationen
| Light Spectrum Waveband | 400 to 700 nm |
| Calibration | ±5% traceable to the U.S. National Institute of Standards Technology (NIST) |
| Sensitivity Range | Typically 5 to 10 μA per 1000 μmoles s-1 m-2 |
| Linearity | Maximum deviation of 1% (up to 10,000 μmole s-1 m-2) |
| Shunt Resistor | 604 Ω, 0.1%, 25 ppm |
| Long-Term Stability | < ±2% change over a 1 year period |
| Response Time | < 1 μs |
| Temperature Dependence | 0.15% per °C (maximum) |
| Cosine Correction | Cosine corrected up to 82° angle of incidence |
| Operating Temperature Range | -40° to +65°C |
| Relative Humidity Range | 0 to 100% (non-condensing) |
| Detector Description | High-stability silicon photovoltaic (blue enhanced) |
| Sensor Housing Description | Weatherproof anodized aluminum case with acrylic diffuser and stainless-steel hardware; O-ring seal on the removable base and cable assembly |
| Diameter | 2.36 cm (0.93 in.) |
| Height | 3.63 cm (1.43 in.) |
| Weight | 84 g (2.96 oz) |
Kompatibel mit
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Datenlogger
| Product | Compatible | Note |
|---|---|---|
| CR1000 (retired) | ||
| CR1000X | ||
| CR300 (retired) | ||
| CR3000 | ||
| CR310 | ||
| CR350 | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (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 using the 015ARM or to a crossarm using the CM225 mount. These sensors should be mounted away from all obstructions and reflective surfaces that might adversely affect the measurement.
Data Logger Considerations
The LI190R-L requires one differential analog input channel per probe.