LI-COR LI-200R Solar Radiation Sensors
Features
- Weather resistant and durable in long-term outdoor deployments
- Cosine corrected to 82° incident angles for accurate measurements
- Detachable sensor simplifies installation and removal of sensor
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
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Overview
The LI-COR LI‑200R measures total solar radiation with an unfiltered silicon photodiode. Although the LI‑200R does not measure the total solar spectrum, its measurements correspond closely to first-class thermopiles under outdoor conditions.
Mechanics
The crown of the sensor rapidly sheds water, reducing pooling around the sensor. It also physically blocks light that is outside the hemisphere of sensitivity, providing a precise cosine response.
Applications
Ideal for agricultural, meteorological, solar energy, and environmental research, it is available with a variety of cable lengths and output signals for compatibility with most data loggers.
- Absolute Calibration: Calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Absolute uncertainty under these conditions is ±3% typical; ±5% maximum.
- Sensitivity: Typically 90 μA per 1,000 W m-2
- Linearity: Maximum deviation of 1% up to 3,000 W m-2
- Response Time: Less than 1μs (2 m cable terminated into a 147 Ohm load)
- Temperature Dependence: ± 0.15% per °C maximum
- Cosine Correction: Cosine corrected up to 82° angle of incidence
- Azimuth: < ± 1% error over 360° at 45° elevation
- Tilt: No error induced from orientation
- Detector: High stability silicon photovoltaic detector (blue enhanced)
- Sensor Housing: Weatherproof anodized aluminum body with acrylic diffuser and stainless steel hardware; O-ring seal on the sensor base
- Size: 2.36 cm diameter × 3.63 cm (0.93” × 1.43”)
- Weight: 24 g head; 60 g base and cable (2 m) with screws
- Cable Length: 2 m, 5 m, 15 m, 50 m (6.5’, 16.4’, 49.2’, 164’)
In The News
With A Modular Update, LI-COR Terrestrial Light Sensors Shine
For environmental professionals looking to measure light, the sun’s energy or photosynthetically active radiation, there is no better choice than LI-COR’s all-new line of terrestrial light sensors. The series, including the LI-190R, LI-200R and LI-210R, has been redesigned from the ground up and is more convenient, reliable and durable than ever before. 
 
The new design centers on a modular setup that lets users detach the sensor head from the base. This makes it possible to swap out sensor heads for calibration or to measure different light parameters. In addition, it adds to project flexibility, saving users time and money.
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A helicopter touches down in the small town of Sicuani, Peru, at an elevation of 11,644 feet. Earlier that day, a boxcar brought fuel, drills, food, and other equipment for a glacial expedition. The year is 1979, and glaciologist Lonnie Thompson is preparing to lead a team to the Quelccaya ice cap in hopes of becoming the first scientists to drill an ice core sample from this glacier. 
 
 The only problem? The glacier is located at 19,000 feet in one of the most remote areas of the world. The helicopter takes off from the town, but the thin atmosphere at that elevation does not allow it to safely touch down on the ice– due to the aircraft’s weight, and it becomes unstable when the air is less dense.
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Our writers sought out environmental professionals dedicated to protecting human health , minimizing the impacts of natural disasters and creating monitoring systems.
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