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Silicon-Cell Pyranometers

Accurate and stable global shortwave radiation measurement

Apogee Instruments' silicon-cell pyranometers are accurate, stable, durable, and cost-effective, the results of continual refinement of design.

Accurate, Stable Measurements
Calibration in controlled laboratory conditions is traceable to the World Radiometeric Reference in Davos, Switzerland. Pyranometers are cosine-corrected with directional errors less than ± 5 % at a solar zenith angle of 75°. Long-term non-stability determined from multiple replicate pyranometers in accelerated aging tests and field conditions is less than 2 % per year.
  Rugged, Self-cleaning Housing
Patented domed shaped sensor head (diffuser and body) facilitate runoff of dew and rain to keep the diffuser clean and minimize errors caused by dust blocking the radiation path. Sensors are housed in a rugged anodize aluminum body and electronics are fully potted.
Pyranometer from Apogee Instruments
Heated Option
A heated pyranometer (SP-230 All-season) is available with a 0.2 W heater to keep water (liquid and frozen) off the sensor and minimize errors caused by dew, frost, rain, or snow blocking the optical path.
  Typical Applications
Applications include shortwave radiation measurement in agricultural, ecological, and hydrological weather networks and solar panel arrays.
Output Options
Multiple analog output options are available including: 0 to 350 mV, 0 to 2.5 V, 0 to 5.0 V, and 4 to 20 mA ranges. The silicon-cell pyranometer is also available attached to a hand-held meter with digital readout.
  Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.


Additional Information
Applications  Pyranometer Applications / Apogee Featured Projects Technical information Apogee Instruments Pyranometer Technical Information
Instructions Using Your Apogee Instruments Pyranometer Owner’s Manuals Spec Sheets
Owner's Manuals


Application Information
1. Reference Pyranometer Traceability and Recalibrations
2. Amplified Sensors Explained
3. Apogee Meter Tips and Troubleshooting
4. When to Recalibrate: Clear Sky Calculator
5. Using the Clear Sky Calculator
6. Sample datalogger programs
Visit our knowledge base for more information