Features & Applications:

This Radiometer UVB Sensor is a waterproof device, and can be safely submerged up to 100 meters. Designed with a rugged, easy to handle housing, the sensor has two #10-32 taped holes on the bottom of the detector housing that allow for the attachment of lowering cables or handles to the detector so its position can be established and maintained.

The detector provides accurate measurements of the biologically weighted ultraviolet radiation from sunlight, also called sunburning UV radiation (SUV). Its spectral response follows closely the erythema action spectrum [1].

Measurements taken with the PMA2104 are comparable to those made by submersible spectroradiometers. The damaging effects of UV-B in the marine environment has been shown for phytoplankton [2], algae, and fish [3].

The biologic effectiveness of the UV radiation can be measured in terms of effective irradiance in radiometric units, for example [µW/cm2]. It is often related to the sensitivity of the human skin to sunburn and expressed in Minimal Erythemal Doses per Hour [MED/Hr]. One MED/Hr is the effective irradiance capable of causing minimum redness (erythema) in an average number 2 skin. Based on a study [4], the relationship between MED/Hr and radiometric units was determined to be:

1 [MED/Hr] = 5.833 [µW/cm2]

The integrated effective dose can be expressed in [mJoules/cm2] or MED. It takes 1/2 hour to accumulate 1 MED when the subject is exposed to an irradiance of 2 MED/Hr.

Sea level solar radiation under 3mm total ozone column, clear sky:

overhead sun: approx. 0.32 W/m2 (5.5 MED/Hr)

30° SZA: approx. 0.25 W/m2 (4.3 MED/Hr)

60° SZA: approx. 0.05 W/m2 (0.9 MED/Hr)

Features:

• NIST Certification
• Takes measurement of ultraviolet radiation from sunlight
• Measures UVB penetration into fresh or salt water
• Waterproof, and can be safely submerged up to 100 meters
• Rugged housing
• Needs to be used with radiometer

Spec Summary:

Angular response:	15% for angles <50°
Range:	20 [MED/Hr], 1,17 [µW/cm2]
Display resolution:	0.001 [MED/Hr], 0.01[µW/cm2]
Operating environment:	32 to 120 °F (0 to +50 °C) no precipitation
Temperature coefficient:	1% /°C for solar radiation
Diameter:	5.5" (139.7 mm)
Height:	3.5" (88.9 mm)
Weight:	48 oz. (1360 grams)

Note: This product does not come with a cable. Custom cables can be ordered by the foot, by calling 1-800-334-9291