What is a Pyranometer?

A pyranometer is a scientific instrument designed to measure solar radiation flux density. It captures sunlight from a full 180-degree field of view, making it essential for applications in meteorology, climatology, and solar energy systems.

How a Pyranometer is Used to Measure Solar Radiation

A pyranometer is used to measure global solar radiation—both direct and diffuse—on a planar surface. It operates based on the thermoelectric effect, where sunlight is absorbed by a blackened surface, generating a voltage proportional to the solar irradiance.

Key Components and Operation

Key components include a glass dome, a blackened thermopile sensor, and a protective housing. The glass dome minimizes weather interference while allowing broadband solar radiation transmission.

Applications and Industries

Pyranometers are vital in solar power plants for efficiency monitoring, agricultural research for crop modeling, and environmental studies assessing climate change impacts.

Frequently Asked Questions

What units does a pyranometer use?
It measures irradiance in watts per square meter (W/m²).

How is it calibrated?
Calibration is traceable to World Radiometric Reference standards ensuring accuracy.

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