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PMA 2111 UVA Detector for Outdoor Installation

 

The PMA2111 UVA detector provides fast and accurate irradiance measurement in the UVA region. Its spectral response covers the 320 to 400nm range. The detector’s enclosure is hermetically sealed and suitable for permanent outdoor operation.

Features:

  • High sensitivity
  • Wide dynamic range
  • Excellent long term stability
  • Cosine corrected
  • NIST traceable calibration
  • Radiometric units
  • Weatherproof

 

> 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:

  • high pressure mercury and metal halide lamps
  • high pressure xenon lamps
  • sunlight
  • Source of UV
  • low pressure florescent lamps

The Teflon diffuser assures an angular response close to a cosine function (Lambertian response) making the detector suitable for measuring diffused radiation or radiation from extended sources.

The PMA2111 detector is ideal for measuring mercury, xenon, metal halide or fluorescent lamps, commonly used for studies in the UVA region, as well as sunlight.
The measured irradiance is displayed in mW/cm2 or W/m2, user selectable. Consequently, the integrated dose is shown in Joules/cm2 or kJoules/m2. The PMA2111 has a resolution of 0.001 mW/cm2 and a full scale of 200mW/cm2 allowing measurement of very week and very strong signals with the same detector. The effect of stray light is negligible.

UVA is less biologically effective than UV-B (280-320nm). However, because of its much greater intensity in sunlight and many artificial sources and the greater period of the day in which sunlight UVA remains at high intensities, UVA can have significant biological effect. The UV-A radiation can also penetrate deeply into
human living tissue through the skin. Commonly known effects of UV-A include: photosensitization of various chemicals, pigmentation of the skin, induction of polymerization. The UVA can also cause erythema or DNA damage in humans or animals, however large doses of UV-A are needed and the damage mechanisms are different than these of UV-B.

Several biologic action spectra, functions relating wavelength of the radiation and its biologic effect, are shown in Figure 3. While they all show strong dominance of UV-B effectiveness there is still fair UVA response.

Figure 3: Selected Biologic Action Spectra

Specifications:

  • Spectral response 320-400nm, figure 1
  • Angular response 5% for angles <50°
  • Range 200 [mW/cm2] or 2000 [W/m2]
  • Display resolution 0.001 [mW/cm2], 0.01[W/m2]
  • Operating environment -40 to 120 °F (-40 to +50 °C) outdoors
  • Temperature coefficient <0.1%/°C
  • Cable 50ft
  • 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 PMA1101

> Return to Detector Selection Guide 

 

Application Notes & Technical Papers:

Interfacing PMA detectors to a Campbell data logger - app111.pdf

PMA Series capabilities and applications - app112.pdf

PMA detector integration - app120.pdf

 

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