Pyranometer

PULSONIC is offering different technology of pyranometer depending of the client's applications.

  • Photo-diode
  • Thermo-pile

 

Photo-diode Pyranometer

The pyranometer using photo-diode as a narrow frequency spectrum compare to thermo-pile. This pyranometer technology are mainly use in application that has no vocation for research or National Meteorology Network :

Photo-diode characteristics

Parameters Values
Measure range 10-1300 W/m²
Accuracy ±15%
Spectral range 400-1100nm
Measure principle Silicium poly cristallin photo-diode

Thermo-pile pyranometer

The pyranometer using thermo-pile as a larger frequency spectrum and has an overall better accuracy.

The pyranometer are characterized by ISO 9060 Standard :

  • Secondary Standard (Best accuracy)
  • First Class
  • Second Class (Lowest accuracy)

WMO-CIMO Guide is advising to use Secondary Standard pyranometer for research application.

Second class

The second class pyranometer are used in applications where photo-diode doesn't provide wide enough spectral measurement.

Specification

Parameters Values
Spectral range (50% points) 300 to 2800nm
Sensitivity 5 to 20 uV/W/m²
Response time (95%) < 18 sec.
Zero offsets
(a) thermal radiation (at 200 W/m²)
< 15 W/m²
Zero offsets
(b) temperature change (5 K/h)
< 5 W/m²
Non-stability (change/year) < 1%
Non-linearity (100 to 1000 W/m²) < 1.5%
Directional response < 20 W/m²
Spectral selectivity < 3%
Temperature response < 5%
Tilt response (0° to 90° at 1000 W/m²) < 1%

First Class

The first class pyranometer are used in high quality network observation system.

Specification

Parameters Values
Spectral range (50% points) 285 to 2800nm
Sensitivity 5 to 20 uV/W/m²
Response time (95%) < 18 sec.
Zero offsets
(a) thermal radiation (at 200 W/m²)
< 12 W/m²
Zero offsets
(b) temperature change (5 K/h)
< 4 W/m²
Non-stability (change/year) < 1%
Non-linearity (100 to 1000 W/m²) < 1%
Directional response < 20 W/m²
Spectral selectivity < 3%
Temperature response < 4%
Tilt response (0° to 90° at 1000 W/m²) < ±1%

Secondary Standard

The secondary standard pyranometer are mainly used in research field. Some applications require extremely high quality properties.

Specification

Parameters Values
Spectral range (50% points) 285 to 2800nm
Sensitivity 7 to 14 uV/W/m²
Response time (95%) < 5 sec.
Zero offsets
(a) thermal radiation (at 200 W/m²)
< 7 W/m²
Zero offsets
(b) temperature change (5 K/h)
< 2 W/m²
Non-stability (change/year) < 0.5%
Non-linearity (100 to 1000 W/m²) < 0.2%
Directional response < 10 W/m²
Spectral selectivity < 3%
Temperature response < 1%
Tilt response (0° to 90° at 1000 W/m²) < 0.2%

Our Automatic Weather Station (AWS) can easily integrate other types of sun radiation sensors. Please contact us for more offers.