Environmental
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LI-210 Photometric SensorMeasures Illuminance as Related to the CIE Standard Observer Curve
Some of the applications for the LI-210 Photometric Sensor include interior and industrial lighting, outdoor illuminance, passive solar energy, architecture and lighting models, illumination engineering, and biological sciences that require illuminance measurements. The LI-210 is a research grade photometric sensor that is very reasonably priced.
Photometry refers to the measurement of visible radiation (light) with a sensor having a spectral responsivity curve equal to the average human eye. This curve is known as the CIE Standard Observer Curve (photopic curve). Photometric sensors are used to measure lighting conditions where the eye is the primary receiver, such as illumination of work areas, interior lighting, television screens, etc. Although photometric measurements have been used in the past in plant science, PPFD and irradiance are the preferred measurements. Absolute Calibration: ± 5% traceable to NIST. Sensitivity: Typically 30 µA per 100 klux. Linearity: Maximum deviation of 1% up to 100 klux. 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. Azimuth: < ± 1% error over 360° at 45° elevation. Tilt: No error induced from orientation. Operating Temperature: -20 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. Size: 2.38 Dia.x 2.54 cm H (0.94”x 1.0”). Weight: 28 g (1 oz.). Cable Length: 3.0 m (10 ft.) standard. There are two different terminations available for the LI-210 Photometric Sensor: The LI-210SA Photometric Sensor has a cable that terminates with a BNC connector. This allows for easy and direct connection to the LI-250A Light Meter or LI-1400 DataLogger. The LI-210SA connected to the 2290 Millivolt Adapter can be used to connect to a data acquisition device or data logger that requires a millivolt signal. The LI-210SL is an LI-210SA and a standardized output millivolt adapter. The LI-210SL produces a standardized 10 mV/100 Klux output that eliminates the need to change calibration constants or multipliers when type SL sensors are exchanged in the field. The LI-210 Photometric Sensor comes with a standard 10 feet (approximately 3 m) of cable. 50-foot and 100-foot extension cables are also available. The 2003S Mounting and Leveling Fixture is recommended for each sensor unless other provisions for mounting are made. Additional accessories are available. LI-210SA Photometric Sensor (with BNC connector) LI-210SL Photometric Sensor (LI-210SA and standardized millivolt adapter) 2003S Mounting and Leveling Fixture 2290 Millivolt Adapter 2222SB-50 Extension Cable (50 ft.) for the LI-210SA and LI-210SL 2222SB-100 Extension Cable (100 ft.) for the LI-210SA and LI-210SL
Additional literature related to the LI-210 is also available:
If you have any questions about the LI-210 please feel free to contact us and discuss with our Applications Analysts and Scientists (or your local LI-COR Distributor) how the LI-210 can help you with your research. Selected Links
Please submit your published papers or links to your websites to be featured here by contacting the Product Manager, Mr. Brent Claassen. Journal ReferencesUse the academic search engines below to find references to the LI-210 in many peer reviewed scientific publications. For best results, start with the search terms provided below or use the forms to customize a search. Results open in a new window. References from HighWire Press - Internet Imprint of the Stanford University Libraries
References from Google Scholar™Common Internet searches can be performed with Google, and many articles can be found with Google Scholar: The LI-210 includes a printed copy of the Instruction Manual. You can download future updates of the LI-210 manual on this page.
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The
LI-210 Photometric Sensor utilizes a filtered silicon
photodiode to provide a spectral response that matches
the CIE curve within ± 5% with most light sources.
This photodiode and filter combination is placed within
a fully cosine-corrected sensor head to provide the proper
response to radiation at various angles of incidence.
