The LI-COR LI-200R Pyranometer offers precise and reliable global solar radiation measurements in watts per square meter (W m⁻²), making it an essential tool for agricultural, meteorological, solar energy, and environmental research. Designed for outdoor use, it performs exceptionally well under unobstructed natural daylight conditions, measuring the combined direct and diffuse solar radiation across the 400 to 1100 nm range.

Built to stand up to harsh environments, the LI-200R is weather-resistant and highly durable, ensuring dependable performance in long-term outdoor deployments. Its innovative design features a detachable sensor, simplifying installation and removal, particularly in setups with complex cabling. Available in lead lengths of 2m, 5m, 15m, and 50m, it offers flexible options to suit various research applications and setups.

Pyranometer for Precise Global Solar Radiation Measurement

One of the standout features of the LI-200R is its uniform sensitivity of up to an 82° incident angle, delivering highly accurate measurements you can trust. The sensor also boasts a precise cosine response, enhanced by a crown design that rapidly sheds water and blocks stray light from outside the hemisphere of sensitivity.

Experience seamless compatibility with various data loggers, thanks to customiSable cable lengths and output signals. Whether you’re monitoring solar radiation for crop performance, studying climate patterns, or optimizing renewable energy systems, the LI-200R Pyranometer provides the reliability and precision your research demands.

Key Benefits:

• Accurate measurement of global solar radiation in W m⁻²
• Durable, weatherproof build for rugged, long-term outdoor use
• Uniform sensitivity and exceptional cosine response for precise readings
• Detachable sensor for easy installation and maintenance
• Available in lead lengths of 2m, 5m, 15m, and 50m for flexible configurations
• Seamless integration with most data loggers

Choose the LI-COR LI-200R Pyranometer for dependable, long-lasting performance in your solar radiation research.

Important Information

The LI-200R measures global solar radiation with an unfiltered silicon photodiode. Its measurements correspond closely to first-class thermopiles when used outdoors under unobstructed natural daylight conditions.

The crown of the sensor rapidly sheds water, and also physically blocks light from outside the hemisphere of sensitivity, providing a precise cosine response.

 

Learn More About the Science Behind the Design

 

 

Absolute Calibration	Calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Calibration uncertainty under these conditions is estimated as ± 3% typical, within ± 60° angle of incidence.*
Sensitivity	Typically 75 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 a 45° elevation
Tilt	No error induced from orientation
Operating Temperature Range	−40 °C to 65 °C
Relative Humidity Range	0% to 100% RH, Non-Condensing
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” diameter × 1.43”)
Weight	24 g head; 60 g base/cable (2 m) with screws
Cable Length	2 m, 5 m, 15 m, 50 m 6.5’, 16.4’, 49.2’, 164’)