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PMA 2140 Global Detector
 

The PMA2140 global radiometer measures irradiance within the range of 400 to 1100nm. It is especially useful in cost-sensitive applications where the flat spectral response of thermopile based instruments is not needed.

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Features:

  • Wide spectral range
  • Excellent long term stability
  • Cosine corrected
  • NIST traceable calibration
  • High sensitivity
  • Low cost

> Detectors need to be used with a radiometer

> Analog version of this detector can be used with any 0 to 5 VDC or 4 to 20mA recording device

Applications:

  • Meteorology
  • Agriculture
  • Solar power research and testing
  • Heating and air conditioning
  • Lighting
  • Physics and optical laboratories

The PMA2140 can be used to monitor the global solar irradiance (direct + diffuse). It is factory calibrated to accurately read the global solar irradiance (from 300 to 2800nm) if exposed to the standard sun, even though the detector is not sensitive beyond 1100nm. This is achieved by applying a correction factor during calibration (see the calibration section). The radiant power within the range of 400-1100nm constitutes about 75% of the total solar radiation for an overhead sun under clear sky.

High sensitivity permits measurements of weak sources but caution is advised when measuring artificial sources since the spectral distribution of the source’s irradiance will affect the reading. A correction factor can be calculated to take the spectral
distribution into account.

The detector is equipped with a cosine diffuser that assures an angular response within 5% of the cosine function for incident angles less than 60 degrees. This diffuser makes it suitable for measurements of diffuse radiation and radiation from extended sources.

 

Specifications:

  • Spectral response 400-1100nm Figure 1
  • Angular response 5% for angles <60°
  • Range 2000 [W/m2]
  • Display resolution 0.01 [W/m2]
  • Operating environment 32 to 120 °F (0 to +50 °C) no precipitation
  • Cable  5ft (1.5m)
  • Diameter 1.6" (40.6 mm)
  • Height 1.8" (45.8 mm)
  • Weight 7.1 oz. (200 grams)

Analog versions of this detector are available See PMA1140

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