Apogee Instruments SU-300 UV-B Instrukcja obsługi - Strona 5
Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Akcesoria Apogee Instruments SU-300 UV-B. Apogee Instruments SU-300 UV-B 19 stron. Ultraviolet index & ultraviolet-b sensor
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INTRODUCTION
Ultraviolet (UV) radiation constitutes a portion of the electromagnetic spectrum from 100 to 400 nm and is further
subdivided into three wavelength ranges: UV-A (315 to 400 nm), UV-B (280 to 315 nm), and UV-C (100 to 280 nm).
Much of the UV-B and all the UV-C wavelengths from the sun are absorbed by Earth's atmosphere. There are also
multiple artificial UV light sources available.
Most UV sensors designed for sunlight measurements are sensitive to UV radiation in the UV-A or UV-B ranges.
Apogee Instruments SU-300 series UV-I/UV-B sensors detect UV radiation from 270 to 315 nm and are calibrated
to output UV Index measurements. UV Index is a relative metric that scales linearly with the intensity of UV
radiation that causes sunburn in humans. Measured UV Index can be converted to energy flux density units of
-2
watts per square meter (W m
, equal to Joules per second per square meter) or photon flux density units of
-2
-1
micromoles per square meter per second (µmol m
s
).
Typical applications of UV-I/UV-B sensors include incoming UV radiation measurement in outdoor environments,
aimed at informing people of potential for UV exposure and sunburn, or in laboratory use with artificial light
sources (e.g., germicidal lamps).
Apogee Instruments SU-300 series UV-I/UV-B sensors consist of a sintered quartz diffuser, photodiode, and signal
processing circuitry mounted in an anodized aluminum housing and a cable to connect the sensor to a
measurement device. SU-300 sensors are designed for continuous UV-I/UV-B radiation measurement in indoor or
outdoor environments. The SU-300 series outputs an analog voltage that is directly proportional to UV-I/UV-B
radiation incident on a planar surface (does not have to be horizontal) where the radiation emanates from all
angles of a hemisphere.